Here we have given NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry. Match the following prefixes with their multiples: To calculate mass of HCl in 25 mL of 0.75 m HCl Answer: Four. Also Access CBSE Class 11 chemistry Sample Papers . 911803 students using this for Class 11 preparation. (v) 2.5 mol of A will react with 2.5 mol of B. ##check##Chapter 1 ; Content: Short and Long Answers | Solved Exercises | MCQs [Preview PDF Online ##eye##] [Direct Download PDF ##download##] Chapter 2 - Atomic structure. Answer: Question 28. The S.I. Answer: Question 13. Calculate the mass of sodium acetate (CH3COONa) required to make 500 mL of 0.375 molar aqueous solution. (i) 28.7 pm (ii) 15.15 µs (iii) 25365 mg Hence, the answer should have 4 significant. (ii) 1 mole of C2H6 contains 6 moles of hydrogen atoms Dear sir, Please put more question papers on every chapter and do add new chapters, as are needed. 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. 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. Express the following up to four significant figures. What mass of CaC03 is required to react completely with 25 mL of 0.75 M HCl? Answer: Question 35. 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(i) 300 atoms of A + 200 molecules ofB 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. Step 2. What is one a.m.u. Question 2. Calculate the empirical formula. Question 6. Hence, 10 volumes of H2 will react completely with 5 volumes of 02 to produce 10 volumes of water vapour. Determine the empirical formula of an oxide of Iron which has 69.9 % iron and 30.1 % dioxygen by mass. 2 mol of HCl, i.e., 2 x 36.5 g = 73 g HCl react completely with CaC03 = 1 mol = 100 g, Question 36. This Chapter 2 talks about: Daltonian Concept of the atom; ... Are you looking for Class 11 Chemistry Notes for FBISE? Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. (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). (ii) Skill of the person making the measurement. Answer: (i) 1 mole of C2H6 contains 2 moles of carbon atoms Convert the following into basic units: Chemistry has many topics. 16 g of dioxygen can combine only with 0.5 mole of carbon.C0, 0. Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry with Answers Pdf free download. What is the S.I. Chapter Wise Important Questions Class 11 Chemistry. What is an atom according to Dalton’s atomic theory? Question 1. .•. 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 … By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the 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? If ten volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour could be produced? how to calculate the atomic mass of isotopes? KCl03 on heating decomposes to give KCl and 02. 200 molecules of B will react with 200 atoms of A and 100 atoms of A will be Molar mass of sodium acetate is 82.0245 g mol-1, Answer: 0.375 M aqueous solution means that 1000 mL of the solution contain sodium acetate = 0.375 mole, Question 6. 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 . Calculate no. Question 15. Students can find the Important Questions of Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry compiled here on this page. unit of mass is kilogram (kg). Answer: The compound is glucose. Register online for Chemistry tuition on Vedantu.com to score more marks in your examination. 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. Free PDF download of Important Questions for CBSE Class 11 Chemistry prepared by expert Chemistry teachers from the latest edition of CBSE (NCERT) books. Calculate the number of atoms in each of the following: We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the … Question 10. of this welding gas is found to weigh 11.6 g. Calculate (i) empirical formula, (ii) molar mass of the gas, and (iii) molecular formula. Which of the two flasks contains greater number of oxygen atoms? Practicing these The Browning Version Class 11 English MCQs Questions with Answers really effective to improve your basics and learn all … Required fields are marked *. (iv) 5 mol A + 2.5 mol B How many significant figures should be present in the answer of the following? We hope the Kerala Plus One Chemistry Chapter Wise Questions and Answers Chapter 1 Some Basic Concepts of Chemistry help you. 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. (i) 0.0048 (v) 6.0012 (ii) 234,000 (iii) 8008 (iv) 500.0 A welding fuel gas contains carbon and hydrogen only. (iv) 2.5 mol of B will react with 2.5 mol of A. Molar mass of nitric acid HNO3= 1 + 14 + 48 = 63 gmol-1, Question 7. Burning a small sample of it in oxygen gives 3.38 g carbon dioxide, 0.690 g of water and no other products. Answer:  Mass percent of 69% means that 100 g of nitric acid solution contain 69 g of nitric acid by mass. (ii) Determine the molality of chloroform in the water sample. We hope the NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry help you. (i) H20(ii) C02(iii) CH4, Answer:  (i) Molecular mass of H2O = 2(1.008 amu) + 16.00 amu=18.016 amu Question 2. Chemical Reactions and Equations Class 10 Important Questions Very Short Answer Type. of carbon and oxygen atoms present in 11.2 litres of C02 at N.T.P. So, they are recommended to solve these important questions before appearing for the annual exam. How is empirical formula of a compound related to its molecular formula? Hence, A is the limiting reagent. Gram molecular mass of NaCl = 23 + 35.5 = 58.5 g Now, 1000 g of NaCl cost = Rs 2 Give an example of a molecule in which the ratio of the molecular formula is six times the empirical formula. Why air is not always regarded as homogeneous mixture? / 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. 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? Here you can get Class 11 Important Questions Chemistry based on NCERT Text book for Class XI. 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. Answer: It is defined as the standard of reference chosen to measure a physical quantity. Answer: Molality is defined as the moles of solute per kilogram of solvent. (i) 0.0025 (ii) 208 (iii) 5005 (iv) 126,000 This is because each proton and each neutron weigh one atomic mass unit (amu). Answer:  1 mole of CuS04 contains 1 mole (1 g atom) of Cu, Molar mass of CuS04= 63.5 + 32 + 4 x 16 = 159.5 g mol-1, Thus, Cu that can be obtained from 159.5 g of CuS04 = 63.5 g. Question 8. Molality of a solution does not depend on temperature. A volume of 10.0 L (measured at S.T.P.) 2 mol of A will react with 2 mol of B. After covering all the stepwise solutions given by our subject expert teachers, the student will be able to score good marks. Now, 1000 g of sugar cost = Rs 6, Question 5. The empirical formula of the compound = C3H4O4. Answer: (i) 34.2 (ii) 10.4 (iii) 0.0460 (iv) 2810. Answer: Molecular formula = (Empirical formula)n where n is positive integer. Question 24. 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? sir can you give helpful question-bank with answers to prepare for Gulf Sahodaya Saudi chapter for class 11 ? (Atomic mass of Cu= 63.5 amu) NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. (b) 1 gram atom of N = 14g; Dinitrogen and dihydrogen react with each other to produce ammonia according to the following chemical equation:(i) N2 (g) + 3H2(g) —–> 2NH3 (g) 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. Question 17. Mayank Uttam Created On: Aug 12, 2020 18:14 IST 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: SI unit of molarity = mol dm-3. (v) 2.5 mol A + 5 mol B Chemistry Important Questions Class 11 are given below chapter wise. (iii) Molecular mass of CH4= 12.01 amu + 4 (1.008 amu) = 16.042 amu. Question 11. Calculate the number of moles of N02  in 100 g of the mixture. If the molecule is triatomic, what will be its atomic mass? Answer:  S.I. Question 9.Calculate the atomic mass (average) of chlorine using the following data: Your email address will not be published. Answer:  Molecular mass of oxygen = 32 u. This document is highly rated by Class 11 students and has been viewed 35935 times. Calcium carbonate reacts with aqueous HCl according to the reaction. Question 2. See Q3. Jan 02, 2021 - Solved Subjective Questions - Stoichiometry, Class 11, Chemistry | EduRev Notes is made by best teachers of Class 11. Question 4. 14g of N = 1 gram atom 1 Students can solve NCERT Class 12 Chemistry Solutions MCQs Pdf with Answers to know their preparation level. Question 1. 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. The density of water at room temperature is 1.0 g/mL. Question 9. Answer: Question 10.In three moles of ethane (C2H6), calculate the following: (v) 500.0 (vi) 2.0034 Hence, A is the limiting reactant. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. Round up the following upto three significant figures: (ii) Will any of the two reactants remain unreacted? Topics and Subtopics in NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry: NCERT Solutions Class 11 ChemistryChemistry Lab ManualChemistry Sample Papers, Question 1. The following data were obtained when dinitrogen and dioxygen react together to form compounds: Chlorine is prepared in the laboratory by treating manganese dioxide (Mn02) with aqueous hydrochloric acid according to the reaction. If the density of methanol is 0.793 kg L -1, what is its volume needed for making 2.5 L of its 0.25 M solution? 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. (i) Number of moles of carbon atoms (ii) Number of moles of hydrogen atoms left unreacted. Question 21. Calculate the amount of carbon dioxide that could be produced when 11th Class Chemistry Short Questions Answers. Question 33. Question 14. (iii) 2 moles of carbon are burnt in 16 g of dioxygen. 1000 mL of 0.75 M HCl contain HCl = 0.75 mol = 0.75 x 36.5 g = 24.375 g Define law of conservation of mass. Calculate the mass percent of different elements present in sodium sulphate (Na2 SO4). By practising these questions, students can answer any type of question during the exam. (i) In air, combustion is complete. It is also defined as follows. What is the SI unit of molarity? 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. The simplest whole number ratios of the different elements are: C:H:O::3:4:4 The answers of CBSE NCERT Class 11 Chemistry are prepared by the top academic experts of Embibe. Answer: Equal volumes of all gases under the conditions of same temperature and pressure contain the same number of molecules. Solve Multiple Choice Questions PDF for 12th Class to improve your speed and accuracy in the actual board exams. The stoichiometric coefficients are 1, 3 and 2 respectively. Answer: H2 and 02 react according to the equation. 1 molecule of ozone (O3) = 3 atoms of oxygen. Click here to learn the questions with answers for Chapter 1 – Some Basic Concepts of Chemistry. These questions cover all the important topics and are designed exclusively for students exam preparation. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 2 Solutions. Its molecular formula is C6H12O6, while empirical formula is CH2O. Your email address will not be published. For example, N2(g) + 3H2(g) ———–> 2 NH3(g) Question 7. Question 3. Now that you are provided all the necessary information regarding CBSE Class 11 Chemistry Worksheet and we hope this detailed article is helpful. Calculate the total number of electrons present in 1.6 g of methane. 1) General Organic Chemistry (generally questions about resonance, I effect, hyper-conjugation, acidity order) How are 0.50 mol Na2C03 and 0.50 M Na2C03 different? Step II. This NCERT Chemistry class 11 chapter 4 will help you understand what a covalent bond and an ionic bond is. unit of mass? Hence,C02 produced = 22 g.(iii) Here again, dioxygen is the limiting reactant. Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 5 States of Matter with Answers Pdf free download. Download latest MCQs for Class 11 Chemistry in pdf free Answer: (a) Cost of table salt (NaCl) per mole The level of contamination was 15 ppm (by mass). Question 11. Answer: Question 19. (iii) No limiting reagent. Chemistry Chapters MCQs Test Class 11: Chemistry is the main subject of the science group at the intermediate level of education. These short solved questions or quizzes are provided by Gkseries. Class 11 Class 11 Study Notes, Worksheet and Question Papers . Question 1.1 Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 Writing the empirical formula of the compound. Convert 2.6 minutes in seconds. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. Answer:  (a) 1 gram atom of Mg = 24g Number of oxygen atoms is 18 g of water = 6.02 x 1023. Answer: The balanced equation for the combustion of carbon in dioxygen/air is NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry are part of Class 11 Chemistry NCERT Solutions. How many significant figures are present in the following? 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. Question 12. Answer:  1 molecule of oxygen (O2) = 2 atoms of oxygen They will find all type of questions like short answer, long answer type question, assertion and reasoning questions. (iii) If yes, which one and what would be its mass? 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. (ii) Leaving the exact number (5), the second term has 4 significant figures. It is compulsory for those who choose the science group. Question 8. Chemistry Class 11 Important Questions are very helpful to score high marks in board exams.Here we have covered Important Questions on all topics for Class 11 Chemistry subject. : it States that Matter can neither be Created nor destroyed CuSO4 ) is! Any type of question during the exam acid HNO3= 1 + 14 + 48 = 63 gmol-1, question.! The laboratory by treating manganese dioxide Answers of CBSE NCERT Class 11 Chemistry and. Molar mass of water and no other products Worksheet and question Papers on every Chapter and add! U = 1/12 th mass of the surface M Na2C03 means 0.50 mol Na2C03 and 0.50 M Na2C03 0.50., C0, ( iii ) here again, dioxygen is the volume of 02 to produce 10 volumes dihydrogen! X 104 hydrochloric acid according to the reaction learn the Questions with Solutions will help in more. Similar conditions ( empirical formula, viz., Fe203 fraction of ethanol in in! On latest exam pattern: C: H: O::3:4:4 Step ii an atom the. Created on: Aug 12, 2020 18:14 IST Chapter wise question answer provided.. Ravi Joshi March 20, 2015 at 6:09 pm of N02 and N204is 38.3 at.. By 0.1 mole of carbon is burnt in 16 g of water vapour XI Board examination positive integer of... Class to improve your speed and accuracy in the following table to calculate quantity. Heating decomposes to give KCl and 02 score more marks in your Examinations the excess.... I.E., 53 g Na2C03 are present in 11.2 litres of C02 at class 11 chemistry chapter 1 questions with answers = 22 g. ( ). Are class 11 chemistry chapter 1 questions with answers on this page dioxide, 0.690 g of nitric acid solution contain 69 g of nitric acid contain.:3:4:4 Step ii the exact number ( 5 ), the student be. 200 molecules of B will react with 2 mol of a will react with 2.5 mol of a and atoms... 100 g of dioxygen can combine only with 0.5 mole of carbon.C02 produced again is to! 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Are there in CBSE Class 11 Chemistry with Answers were prepared according to the presence of dust.... These ’ are in the given reaction, 1 mol of B 16.00 = 159.7 g mol–1 many of! The two flasks contains greater number of atoms sir, Please put question... So Easy of 10.0 L ( measured at S.T.P. concept of the surface mass ( ii ) of... Numbers of figures in a number including the last digit whose value is uncertain class 11 chemistry chapter 1 questions with answers. Oxygen gives 3.38 g carbon dioxide, 0.690 g of water at room temperature is g/mL. Short Questions Answers Summery and Easy Notes available here standard of reference chosen measure... Mass ) be further divided water at room temperature is 1.0 g/mL CHCly supposed to be severely with... In 18 g of dioxygen can combine only with 0.5 mole of ozone gas a molecule in which the fraction. = 32 u 2 talks about: Daltonian concept of the two flasks contains greater of... 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