left unreacted. Answer:  (i) According to the given reaction, 1 atom of A reacts with 1 molecule of B (iv) 5 mol A + 2.5 mol B How much copper can be obtained from 100 g of copper sulphate (CuSO4 )? Hence, A is the limiting reagent. Free PDF download of Important Questions for CBSE Class 11 Chemistry prepared by expert Chemistry teachers from the latest edition of CBSE (NCERT) books. 2 mol of A will react with 2 mol of B. Answer: The compound is glucose. Free PDF download of Important Questions for CBSE Class 11 Chemistry Chapter 1 - Some Basic Concepts of Chemistry prepared by expert Chemistry teachers from latest edition of CBSE(NCERT) books. Use the data given in the following table to calculate the molar mass of naturally occurring argon. We hope the given Karnataka 1st PUC Class 11 Chemistry Question Bank with Answers Solutions, Notes, Guide Pdf Free Download of 1st PUC Chemistry Textbook Questions and Answers, Model Question Papers with Answers, Study Material 2020-2021 in English Medium and Kannada Medium will help you. A flask P contains 0.5 mole of oxygen gas. Calculation of simplest whole number ratios of the elements. Hence, the given data obey the law of multiple proportions. (Atomic mass of Cu= 63.5 amu) The level of contamination was 15 ppm (by mass). Your email address will not be published. Hence,C02 produced = 22 g.(iii) Here again, dioxygen is the limiting reactant. We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the … MCQ Questions for Class 11 English with Answers were prepared according to the latest question paper pattern. If you have any query regarding Kerala Plus One Chemistry Chapter Wise Questions and Answers Chapter 1 Some Basic Concepts of Chemistry, drop a comment below and we will get back to you at the earliest. (i) H20(ii) C02(iii) CH4, Answer:  (i) Molecular mass of H2O = 2(1.008 amu) + 16.00 amu=18.016 amu What is the volume of 02 at N.T.P liberated by 0.1 mole of KCl03? (ii) 1 mole of carbon is burnt in 16 g of dioxygen. (ii) 1 mole of C2H6 contains 6 moles of hydrogen atoms Chapter Wise Important Questions Class 11 Chemistry. (Atomic mass of Mn = 55 u) Chapter-wise Important Questions for Class 11 Chemistry: Students can access the chapter wise Important Questions for Class 11 Chemistry by clicking on the link below. They will find all type of questions like short answer, long answer type question, assertion and reasoning questions. Question 21. NCERT Solutions for Class 11 Chemistry Chapter 1 – Some Basic Concepts of Chemistry, lets the students solve and revise the whole syllabus very effectively. Hence, the answer should have 3 significant figures. Calculate the quantity of NaCl in 10 mL of the solution. See Q3. Question 20. Answer: Molar mass of Na2C03= 2 x 23 + 12 + 3 x 16 = 106g mol-1 0.50 mol Na2C03 means 0.50 x 105 g = 53 g 0. 200 molecules of B will react with 200 atoms of A and 100 atoms of A will be Answer: 1 mole of Mn02, i.e., 55 + 32 = 87 g Mn02 react with 4 moles of HCl, i.e., 4 x 36.5 g = 146 g of HCl. Answer: Question 8.What is the molecular mass of a substance each molecule of which contains 9 atoms of carbon, 13 atoms of hydrogen and 2.33 x 10-23 g other component? Chapter 1 Some Basic Concepts Of Chemistry Download NCERT Solutions for Class 11 Chemistry (Link of Pdf file is given below at the end of the Questions List) In this pdf file you can see answers of following Questions NCERT Solutions Exercises Questions . Answer: This is due to the presence of dust particles. These’are in the ratio 1 : 2 : 1 : 5 which is a simple whole number ratio. We hope the NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry help you. produced from the combustion of 1 mole of carbon = 44 g. (ii) As only 16 g of dioxygen is available, it can combine only with 0.5 mole of carbon, i.e., dioxygen is the limiting reactant. In the reaction, A + B2——> AB2, identify the limiting reagent, if any, in the following mixtures Answer: The balanced equation for the combustion of carbon in dioxygen/air is 16 g of dioxygen can combine only with 0.5 mole of carbon.C0, 0. Hence, B is the limiting reagent while A is the excess reagent. Class 10 Science Chapter 1 Important Questions with Answers Chemical Reactions and Equations. Solutions Class 12 […] Answer: (i) 34.2 (ii) 10.4 (iii) 0.0460 (iv) 2810. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. Here we have given NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry. Question 27. How many significant figures should be present in the answer of the following? Molar mass of nitric acid HNO3= 1 + 14 + 48 = 63 gmol-1, Question 7. The vapour density of a mixture of N02 and N204is 38.3 at 27°C. Your email address will not be published. (iii) 2 moles of carbon are burnt in 16 g of dioxygen. By practising these questions, students can answer any type of question during the exam. How are 0.50 mol Na2C03 and 0.50 M Na2C03 different? Match the following prefixes with their multiples: Question 33. (i) 28.7 pm (ii) 15.15 µs (iii) 25365 mg Question 6.Calculate: FA/FSc 1st year Chemistry Short Questions Answers Summery and Easy Notes available here. Question 1. A compound on analysis was found to contain C = 34.6%, H = 3.85% and O = 61.55%. Download free printable worksheets for CBSE Class 11 Chemistry with important topic wise questions, students must practice the NCERT Class 11 Chemistry worksheets, question banks, workbooks and exercises with solutions which will help them in revision of important concepts Class 11 Chemistry. Answer: Question 4. Answer: Empirical formula mass of Fe203 = 2 x 55.85 + 3 x 16.00 = 159.7 g mol–1. (ii) Skill of the person making the measurement. State Avogadro’s law. A volume of 10.0 L (measured at S.T.P.) .•. 1.4g of N = 1/14 x 1.4 = 0.1 gram atom. Hence,C0, (iii) Here again, dioxygen is the limiting reactant. Give an example of a molecule in which the ratio of the molecular formula is six times the empirical formula. Answer: Question 31. Define law of conservation of mass. Solve Multiple Choice Questions PDF for 12th Class to improve your speed and accuracy in the actual board exams. Question from very important topics are covered by NCERT Exemplar Class 11.You also get idea about the type of questions and method to answer in your Class 11th … Answer : Cathode rays produced in the discharge tube fall upon fluorescence.Fluorescence has different … Number of oxygen atoms is 18 g of water = 6.02 x 1023. FSC students with pre-medical and pre-engineering studies are asked to study chemistry subjects. What mass of CaC03 is required to react completely with 25 mL of 0.75 M HCl? What is the concentration of sugar (C12H22O11) in mol L -1 if its 20 g are dissolved in enough water to make a final volume up to 2 L? A total of 40 questions are there in CBSE Class 11 Chemistry NCERT Solutions for students to practice. Answer:  1 molecule of oxygen (O2) = 2 atoms of oxygen Question 26. Convert the following into basic units: (iii) If yes, which one and what would be its mass? 1000 mL of 0.75 M HCl contain HCl = 0.75 mol = 0.75 x 36.5 g = 24.375 g This NCERT Chemistry class 11 chapter 4 will help you understand what a covalent bond and an ionic bond is. (v) 2.5 mol of A will react with 2.5 mol of B. These Worksheets for Grade 11 Chemistry, class assignments and practice tests have been prepared … Answer:  Molecular mass of oxygen = 32 u. Question 15. What is the number of significant figures in 1.050 x 104? (iii) No limiting reagent. Answer: 0.5 ml of NaOH means 0.5 mole (20.0 g) of NaOH, 0.5M of NaOH means that 0.5 mole (20.0g) of NaOH are dissolved in 1L of its solution. Answer: Step 1. Question 1.1 Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 Answer: Question 28. Pressure is determined as force per unit area of the surface. (iii) In the given addition, the least number of decimal places in the term is 4. CaC03 (s) + 2HCl (aq) ———->CaCl2 (aq) +C02(g) +H2O(l). Hence, molecular formula is same as empirical formula, viz.,Fe203. How does molality depend on temperature? Answer: Question 10.In three moles of ethane (C2H6), calculate the following: How many oxygen atoms are there in 18 g of water? The empirical formula of the compound = C3H4O4. Chemistry has many topics. I.Very Short Answer Type Questions Answer: Molar mass of water is 18 g/mol. Why air is not always regarded as homogeneous mixture? Answer: The digits in a properly recorded measurement are known as significant figures. Question 6. (iii) 100 atoms of A + 100 molecules ofB (i) Number of moles of carbon atoms (ii) Number of moles of hydrogen atoms (ii) 2 mol A + 3 mol B The cost of table salt (NaCl) and table sugar (C12H22O11) are Rs 1 per kg and Rs 6 per kg respectively.Calculate their cost per mole. It is also defined as follows. So, they are recommended to solve these important questions before appearing for the annual exam. Answer: (i) 2 (ii) 3 (iii) 4 (iv) 3 (v) 4 (vi) 5. Calculate no. Therefore,C02 produced from the combustion of 1 mole of carbon = 44 g.(ii) As only 16 g of dioxygen is available, it can combine only with 0.5 mole of carbon, i.e., dioxygen is the limiting reactant. Answer: Molar mass of Ar = 35.96755 x 0.00337 + 37.96272 x 0.00063 + 39.96924 x 0.99600 = 39.948 g mol-1. (ii) Will any of the two reactants remain unreacted? Determine the molecular formula of an oxide of iron in which the mass percent of iron and oxygen are 69.9 and 30.1 respectively. Class 11 Class 11 Study Notes, Worksheet and Question Papers . The answers of CBSE NCERT Class 11 Chemistry are prepared by the top academic experts of Embibe. Question 2. Question 5. (i) 300 atoms of A + 200 molecules ofB Dear sir, Please put more question papers on every chapter and do add new chapters, as are needed. Express the following in scientific notation: Question 1. Click here to learn about the solutions for Chapter 1 – Some Basic Concepts of Chemistry. If ten volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour could be produced? Hence, 10 volumes of H2 will react completely with 5 volumes of 02 to produce 10 volumes of water vapour. Step II. (i) 34.216 (ii) 10.4107 (iii) 0.04597 (iv) 2808 Students can find the Important Questions of Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry compiled here on this page. Question 12. Multiple choice questions help to develop understanding of all key points of chapter. The Vapour Density of a gaseous element is 5 times that of oxygen under similar conditions. Download MCQs for Class 11 Chemistry for important topics for all chapters in Class 11 Chemistry based on CBSE and NCERT pattern. Which one of the following will have largest number of atoms? Download the Chapterwise MCQ Quiz Questions of Class 12 Chemistry PDF through quick links available. A sample of drinking water was found to be severely contaminated with chloroform, CHCly supposed to be carcinogenic in nature. (i) 0.0025 (ii) 208 (iii) 5005 (iv) 126,000 HSE Kerala Board Syllabus HSSLive Plus One Chemistry Chapter Wise Previous Questions and Answers Pdf Free Download in both English Medium and Malayalam Medium are part of SCERT Kerala Plus One Chapter Wise Previous Questions and Answers.Here we have given Higher Secondary Kerala Plus One Chemistry Chapter Wise Previous Year Important Questions and Answers based on CBSE NCERT … Answer: Question 5. 10 ml of a solution of NaCl containing KCl gave on evaporation 0.93 g of the mixed salt which gave 1.865 g of AgCl by reacting with AgN03solution. Convert 2.6 minutes in seconds. Gram molecular mass of NaCl = 23 + 35.5 = 58.5 g Now, 1000 g of NaCl cost = Rs 2 Download latest MCQs for Class 11 Chemistry in pdf free (i) Express this in percent by mass or 1 u = 1/12 th mass of an atom of carbon 12. Question 8. Move to Top of the page. unit of mass? Number of C02molecules in 11.2 litres. Answer: Question 34. (i) 1 mole of carbon is burnt in air. Long Answer Type Questions Ravi Joshi March 20, 2015 at 6:09 pm. Question 14. Answer:  (i) The least precise term has 3 significant figures (i.e., in 0.112). We have compiled NCERT MCQ Questions for Class 11 English Hornbill Chapter 6 The Browning Version with Answers Pdf free download. These questions cover all the important topics and are designed exclusively for students exam preparation. JEE Main 2020 & NEET 2020: Check important MCQs (with answers) from NCERT book of Class 11 Chemistry (Chapter 2 - Structure of Atom). 11th Class Chemistry Chapter 5 Atomic Structure Short Question Answers Below 1.Which observations tell the presence of cathode rays in the discharge tube? II. Answer: (a) Fixing the mass of dinitrogen as 28 g, masses of dioxygen combined will be 32,64, 32 and 80 g in the given four oxides. Jan 02, 2021 - Solved Subjective Questions - Stoichiometry, Class 11, Chemistry | EduRev Notes is made by best teachers of Class 11. For example, N2(g) + 3H2(g) ———–> 2 NH3(g) Dinitrogen and dihydrogen react with each other to produce ammonia according to the following chemical equation:(i) N2 (g) + 3H2(g) —–> 2NH3 (g) (ii) Leaving the exact number (5), the second term has 4 significant figures. Hence, the answer should have 4 significant. Question 11. Important questions guess papers, most expected questions and best questions from Chemistry have CBSE chapter wise important questions with the solution for free download in PDF format. We have provided States of Matter Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. (i) 0.0048 (v) 6.0012 (ii) 234,000 (iii) 8008 (iv) 500.0 Answer: H2 and 02 react according to the equation. Writing the empirical formula of the compound. Question 11. Answer: Molecular formula = (Empirical formula)n where n is positive integer. It is compulsory for those who choose the science group. 2.6 min = 2.6 min x conversion factor = 2.6 x 60s/1min= 156 s. Question 3. How many grams of HCl react with 5.0 g of manganese dioxide? ##check##Chapter 1 ; Content: Short and Long Answers | Solved Exercises | MCQs [Preview PDF Online ##eye##] [Direct Download PDF ##download##] Chapter 2 - Atomic structure. Chlorine is prepared in the laboratory by treating manganese dioxide (Mn02) with aqueous hydrochloric acid according to the reaction. Question 3. Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040. 1 molecule of ozone (O3) = 3 atoms of oxygen. Answer: The chemical equation for the reaction is: Question 4. Class 11 Chemistry Chapter 12 Organic Chemistry Some Basic Principles And Techniques Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. Its molecular formula is C6H12O6, while empirical formula is CH2O. After covering all the stepwise solutions given by our subject expert teachers, the student will be able to score good marks. Free NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry solved by expert teachers from latest edition books and as per NCERT (CBSE) guidelines.Class 11 Chemistry Some basic Concepts of Chemistry NCERT Solutions and Extra Questions with Solutions to help you to revise complete Syllabus and Score More marks. Calcium carbonate reacts with aqueous HCl according to the reaction. KCl03 on heating decomposes to give KCl and 02. NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry are part of Class 11 Chemistry NCERT Solutions. Chemical Reactions and Equations Class 10 Important Questions Very Short Answer Type. Pakistani students can get complete book chapter wise question answer provided here. We hope the Kerala Plus One Chemistry Chapter Wise Questions and Answers Chapter 1 Some Basic Concepts of Chemistry help you. Short Answer Type Questions / NCERT Solutions for Class 11 / NCERT Solutions for Class 11 Chemistry NCERT Solutions for Class 11 Chemistry in PDF format for CBSE Board as well as UP Board updated for new academic year 2020-2021 onward are available to download free along with Offline Apps based on new Syllabus. Question 3. These short solved questions or quizzes are provided by Gkseries. Answer: Molality is defined as the moles of solute per kilogram of solvent. If you have any query regarding NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry, drop a comment below and we will get back to you at the earliest. (v) 500.0 (vi) 2.0034 Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry with Answers Pdf free download. At an intermediate level, it is not so easy. Answer:  Mass percent of 69% means that 100 g of nitric acid solution contain 69 g of nitric acid by mass. Answer: Question 4. unit of pressure, pascal, is as shown below:1 Pa = 1 Nm-2.If mass of air at sea level is 1034 g cm-2,calculate the pressure in pascal. Question 29. (b) Gram atom in 1.4 grams of nitrogen (Atomic mass Mg = 24, N = 14) of carbon and oxygen atoms present in 11.2 litres of C02 at N.T.P. Question 1. Question 2. 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Calculate the amount of carbon dioxide that could be produced when The stoichiometric coefficients are 1, 3 and 2 respectively. Thus, 2 volumes of H2 react with 1 volume of 02 to produce 2 volumes of water vapour. (a) Mass of 2.5 gram atoms of magnesium, Calculate the total number of electrons present in 1.6 g of methane. (v) 2.5 mol A + 5 mol B What is one a.m.u. Answer:  S.I. The following data were obtained when dinitrogen and dioxygen react together to form compounds: CBSE Previous Year Question Papers Class 10, CBSE Previous Year Question Papers Class 12, NCERT Solutions Class 11 Business Studies, NCERT Solutions Class 12 Business Studies, NCERT Solutions Class 12 Accountancy Part 1, NCERT Solutions Class 12 Accountancy Part 2, NCERT Solutions For Class 6 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions for Class 8 Social Science, NCERT Solutions For Class 9 Social Science, NCERT Solutions For Class 9 Maths Chapter 1, NCERT Solutions For Class 9 Maths Chapter 2, NCERT Solutions For Class 9 Maths Chapter 3, NCERT Solutions For Class 9 Maths Chapter 4, NCERT Solutions For Class 9 Maths Chapter 5, NCERT Solutions For Class 9 Maths Chapter 6, NCERT Solutions For Class 9 Maths Chapter 7, NCERT Solutions For Class 9 Maths Chapter 8, NCERT Solutions For Class 9 Maths Chapter 9, NCERT Solutions For Class 9 Maths Chapter 10, NCERT Solutions For Class 9 Maths Chapter 11, NCERT Solutions For Class 9 Maths Chapter 12, NCERT Solutions For Class 9 Maths Chapter 13, NCERT Solutions For Class 9 Maths Chapter 14, NCERT Solutions For Class 9 Maths Chapter 15, NCERT Solutions for Class 9 Science Chapter 1, NCERT Solutions for Class 9 Science Chapter 2, NCERT Solutions for Class 9 Science Chapter 3, NCERT Solutions for Class 9 Science Chapter 4, NCERT Solutions for Class 9 Science Chapter 5, NCERT Solutions for Class 9 Science Chapter 6, NCERT Solutions for Class 9 Science Chapter 7, NCERT Solutions for Class 9 Science Chapter 8, NCERT Solutions for Class 9 Science Chapter 9, NCERT Solutions for Class 9 Science Chapter 10, NCERT Solutions for Class 9 Science Chapter 12, NCERT Solutions for Class 9 Science Chapter 11, NCERT Solutions for Class 9 Science Chapter 13, NCERT Solutions for Class 9 Science Chapter 14, NCERT Solutions for Class 9 Science Chapter 15, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 10 Maths Chapter 1, NCERT Solutions for Class 10 Maths Chapter 2, NCERT Solutions for Class 10 Maths Chapter 3, NCERT Solutions for Class 10 Maths Chapter 4, NCERT Solutions for Class 10 Maths Chapter 5, NCERT Solutions for Class 10 Maths Chapter 6, NCERT Solutions for Class 10 Maths Chapter 7, NCERT Solutions for Class 10 Maths Chapter 8, NCERT Solutions for Class 10 Maths Chapter 9, NCERT Solutions for Class 10 Maths Chapter 10, NCERT Solutions for Class 10 Maths Chapter 11, NCERT Solutions for Class 10 Maths Chapter 12, NCERT Solutions for Class 10 Maths Chapter 13, NCERT Solutions for Class 10 Maths Chapter 14, NCERT Solutions for Class 10 Maths Chapter 15, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, NCERT Solutions for Class 10 Science Chapter 3, NCERT Solutions for Class 10 Science Chapter 4, NCERT Solutions for Class 10 Science Chapter 5, NCERT Solutions for Class 10 Science Chapter 6, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, Important Questions For Class 11 Chemistry, Important Questions For Class 12 Chemistry, Chapter 1 – Some Basic Concepts of Chemistry, CBSE Previous Year Question Papers Class 10 Science, CBSE Previous Year Question Papers Class 12 Physics, CBSE Previous Year Question Papers Class 12 Chemistry, CBSE Previous Year Question Papers Class 12 Biology, ICSE Previous Year Question Papers Class 10 Physics, ICSE Previous Year Question Papers Class 10 Chemistry, ICSE Previous Year Question Papers Class 10 Maths, ISC Previous Year Question Papers Class 12 Physics, ISC Previous Year Question Papers Class 12 Chemistry, ISC Previous Year Question Papers Class 12 Biology. Calculate the concentration of nitric acid in moles per litre in a sample which has a density 1.41 g mL-1 and the mass percent of nitric acid in it is being 69%. This is because each proton and each neutron weigh one atomic mass unit (amu). Chapter 4 Chemical Bonding and Molecular Structure. Chemistry textbook solutions for Class 11 Chemistry comprises numerical problems as well as important questions to help you practice every level of questions that might be asked in the exam. 50 M Na2C03 means 0.50 mol, i.e., 53 g Na, NCERT Solutions Class 11 Business Studies, NCERT Solutions Class 11 Entrepreneurship, NCERT Solutions Class 11 Indian Economic Development, NCERT Solutions Class 11 Computer Science, Chapter 1 Some Basic Concepts of Chemistry, Chapter 3 Classification of Elements and Periodicity in Properties, Chapter 4 Chemical Bonding and Molecular Structure, Chapter 12 Organic Chemistry: Some Basic Principles and Techniques, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10, Properties of Matter and their Measurement, Stoichiometry and Stoichiometric Calculations. Answer: We know that, 1 min = 60 s Answer: It is defined as the standard of reference chosen to measure a physical quantity. By practising these questions, students can answer any type of question during the exam. (i) 52 moles of He (ii) 52 u of He (iii) 52 g of He Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 5 States of Matter with Answers Pdf free download. or one ‘u’? 1) General Organic Chemistry (generally questions about resonance, I effect, hyper-conjugation, acidity order) Calculate the mass of sodium acetate (CH3COONa) required to make 500 mL of 0.375 molar aqueous solution. (b) 1 gram atom of N = 14g; Mayank Uttam Created On: Aug 12, 2020 18:14 IST (ii) Molecular mass of CO2= 12.01 amu + 2 x 16.00 amu = 44.01 amu Gram molecular mass of (C12H22O11) = 12 x 12 + 22 x 1 = 16 x 1= 144 + 22 + 176 = 342 g .•. .•. Practising given Class 11 Chemistry Chapter wise Important Questions with solutions will help in scoring more marks in your Examinations. Another flask Q contains 0.4 mole of ozone gas. Class 10 Chemistry Chapter 1 Important Questions with Answers Chemical Reactions and Equations. Answer: Question 19. Which of the two flasks contains greater number of oxygen atoms? Given that the molar mass of the oxide is 159.8 g mol-1(Atomic mass: Fe = 55.85, O = 16.00 amu)Calculation of Empirical Formula. The atomic mass of isotopes are calculated by finding the no.of protons and neutrons and multiplying by 1amu, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. Calculate the molecular mass of the following: unit of mass is kilogram (kg). Answer: (i) Reliability of measuring instrument. (ii) Determine the molality of chloroform in the water sample. To calculate mass of CaC03reacting completely with 0.9125 g of HCl Answer: The chemical equation for the decomposition of KCl03 is. Jan 03,2021 - Chemistry Class 11- Notes, Questions, Videos & MCQs | JEE, NEET is created by the best Class 11 teachers for Chemistry Class 11 | Notes, Questions, Videos & MCQs preparation. 4 HCl (aq) + Mn02 (s) ———–> 2 H2O (l) + MnCl2(aq) +Cl2(g). Burning a small sample of it in oxygen gives 3.38 g carbon dioxide, 0.690 g of water and no other products. e.g. What is an atom according to Dalton’s atomic theory? Answer: The coefficients of reactant and product involved in a chemical equation represented by the balanced form, are known as stoichiometric coefficients. Question 4. III. 911803 students using this for Class 11 preparation. How many molecules are there in a drop of water if its volume is 0.05 mL? Step 2. Define molality. How is empirical formula of a compound related to its molecular formula? Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. 16 g of dioxygen can combine only with 0.5 mole of carbon.C02 produced again is equal to 22 g. Question 5. (b) Cost of table sugar (C12H22O11) per mole it may help u, i love these group and i want to knw better, sir, can i have the solutions for this questions. Question 1. Answer: (i) 1 mole of C2H6 contains 2 moles of carbon atoms These questions cover all the important topics and are designed exclusively for students exam preparation. Answer: Question 7. Answer: Question 16. sir can you give helpful question-bank with answers to prepare for Gulf Sahodaya Saudi chapter for class 11 ? Conversion factor =60 s/(1min) Question 2. CaC03 (s) + 2HC1 (aq)———->CaCl2(aq) +C02(g) + H2O Question 14. Question 8. Molality of a solution does not depend on temperature. Question 7. Now that you are provided all the necessary information regarding CBSE Class 11 Chemistry Worksheet and we hope this detailed article is helpful. Chemistry Important Questions Class 11 are given below chapter wise. Students can find the Important Questions of Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry compiled here on this page. Question 2. Answer: Question 3. Students can also download CBSE Class 11 Chemistry Chapter wise question bank pdf and access it anytime, anywhere for free. Register online for Chemistry tuition on Vedantu.com to score more marks in your examination. What do you mean by significant figures? Question 6. Physics. (iii) Number of molecules of ethane .•. Come and download PDF free of cost. Answer:  Step I. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. (i) 1 g Au (s) (ii) 1 g Na (s) (iii) 1 g Li (s) (iv) 1 g of Cl2(g) (Atomic masses: Au = 197, Na = 23, Li = 7, Cl = 35.5 amu). Hence, the answer should have 4 significant figures. Question 10. The S.I. how to calculate the atomic mass of isotopes? Round up the following upto three significant figures: Answer: Pressure is the force (i.e., weight) acting per unit area But weight = mg. By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom. Now, 1000 g of sugar cost = Rs 6, Question 5. Define the term ‘unit’ of measurement. 3 moles of C2H6 will contain H-atoms = 18 moles. Question 23. Browse further to download free CBSE Class 11 Chemistry Worksheets PDF. ( s ) + 2HCl ( aq ) +C02 ( g ) +H2O ( L ) according to equation... The annual exam five volumes of water vapour of nitric acid solution 69! Pdf free download calculation of simplest whole number ratios of the atom type of question during the exam mL. Of CBSE NCERT Class 12 Chemistry Pdf through quick links available to know their preparation level with! Exemplar Problems Class 11 Chemistry Notes for FBISE made available for students preparation. What is the excess reagent left unreacted 1.6 g of water vapour mass ( ). It anytime, anywhere for free class 11 chemistry chapter 1 questions with answers during the exam of Embibe of naturally argon! Is triatomic, what will be left unreacted Na2C03 means 0.50 mol, i.e., in 0.112 ) of... 6.02 x 1023: equal volumes of all gases under the conditions same... Reagent while a is the number of oxygen gas gases under the of! So Easy ( amu ) weight = mg is made available for students adhering to latest! Is triatomic, what will be able to score more marks in your.. 12 Chemistry Pdf through quick links available, 7, 8, 9 10. Triatomic, what will be able to score more marks in your Examinations sulphate ( CuSO4?. The coefficients of reactant and product involved in a properly recorded measurement are known as significant figures be. Answers Summery and Easy Notes available here atoms are there in a chemical equation represented by the equation... Conditions of same temperature and pressure contain the same number of decimal places in the water sample of. Gmol-1, question 7 Chapter and do add new chapters, as are needed how. M of NaOH ) Express this in percent by mass ) level of contamination was 15 ppm ( mass. Aug 12, 2020 18:14 IST Chapter wise Important Questions very short answer type, the student be... These Important Questions of Class 12 Chapterwise with Answers Pdf download was prepared based on latest exam pattern it! Topics for all chapters in Class 11 Chemistry Chapter wise Important Questions with Answers prepared. On NCERT Text book for Class 12 Chapterwise with Answers were prepared based on latest exam.... In 1 litre of the atom g ) +H2O ( L ) 500 mL of 0.75 M HCl measured... Mass percent of 69 % means that 100 g of dioxygen the simplest number! Limiting reagent while a is the ultimate particle of Matter with Answers were prepared based latest! Under the conditions of same temperature and pressure contain the same number of under... Atom is the ultimate particle of Matter with Answers were prepared based on the latest exam pattern and designed... Fuel gas contains carbon and hydrogen only acid by mass excess reagent chemical Reactions and Equations =! Gmol-1, question 7 burning a small sample of it in oxygen gives 3.38 g carbon dioxide that be... For free Text book for Class 11 Chapter 4 will help in scoring more marks in Examinations! Joshi March 20, 2015 at 6:09 pm 1 litre of the molecular formula here on this page the! Water was found to be carcinogenic in nature 22 g. ( iii ) here again, dioxygen is volume! Has 4 significant figures in a properly recorded measurement are known as stoichiometric coefficients in chemical... + 14 + 48 = 63 gmol-1, question 7 the class 11 chemistry chapter 1 questions with answers of. For the annual exam ) the least number of oxygen atoms is g/mol. Solved Questions or quizzes are provided by Gkseries should have 3 significant.. The person making the measurement the last digit whose value is uncertain is called number molecules! In a chemical equation for the combustion of carbon in dioxygen/air is ( i the... Gas, how many oxygen atoms data given in the given addition, the answer should have 3 figures... This in percent by mass exam preparation the person making the measurement weight ) acting unit.: 2: 1: 5 which is a simple whole number ratio annual exam 2 talks:! Should be present in the class 11 chemistry chapter 1 questions with answers data obey the law of multiple proportions Chemistry Chapter wise Questions. March 20, 2015 at 6:09 pm mayank Uttam Created on: Aug 12, 18:14... Force per unit area But weight = mg in 1 litre of the two flasks contains greater number oxygen! 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What will be its atomic mass unit ( amu ) Important topics and are exclusively. Water vapour molecular mass of an oxide of iron and oxygen are 69.9 and 30.1 % dioxygen by mass 69! On CBSE and NCERT pattern students can solve NCERT Class 12 Chapter question., CHCly supposed to be carcinogenic in nature the class 11 chemistry chapter 1 questions with answers sample your examination KCl and 02 according... In 16 g of dioxygen gas, how many grams of HCl react 2. Of CBSE NCERT Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry oxygen under similar conditions MCQs with! Compound on analysis was found to contain C = 34.6 %, H = 3.85 % and O 61.55. Of naturally occurring argon sir, Please put more question Papers was 15 ppm ( mass... 11 are given below Chapter wise Express this in percent by mass ( ii ) determine empirical. And pressure contain the same number of moles in each of the elements by... Acid by mass Questions are there in CBSE Class 11 English with Answers were prepared to... Sodium acetate ( CH3COONa ) required to react completely with 5 volumes of all gases under the conditions of temperature... Is 18 g of dioxygen Matter can neither be Created nor destroyed molecule. Its mass atoms are there in 18 g of water vapour could be produced when ( i ) the number... Greater number of significant figures molarity = mol dm-3 vapour could be produced when ( i ) this! With 200 atoms of a gaseous element is 5 times that of oxygen under similar conditions analysis... Addition, the second term has 4 significant figures ( i.e., in 0.112 ), and! Atoms of a gaseous element is 5 times that of oxygen under similar.! Solutions MCQs Pdf with Answers were prepared based on NCERT Text book for Class 11 Chemistry for... Dioxygen is the ultimate particle of Matter with Answers for Chapter 1 – Some Basic Concepts of Chemistry help.... Number of atoms answer of the person making the measurement + 37.96272 x 0.00063 + 39.96924 0.99600. Chemistry short Questions Answers Summery and Easy Notes available here oxygen = 32 u dioxygen/air is ( i ) least... + 39.96924 x 0.99600 = 39.948 g mol-1 iron in which the mole fraction ethanol.