Chapter 3 - Classification of Elements & Periodicity in Properties 11 videos | 13 docs | 10 tests Test: … The gas is now transferred to another vessel at constant temperature, where pressure becomes half of the original pressure. Atomic weight = (Equivalent weight × Valency) (iv) At constant temperature and pressure 200 mL of hydrogen will combine with 100 mL oxygen to produce 200 mL of water vapour. The molar mass of (d) Four Mole. NA (Avogadros number = 6.022×1023) (c) Atomicity Which of the following solutions have the same concentration? Multiple Choice … Explanation: The empirical formula of the compound would be It is compulsory for those who choose the science group. (a) 26.89 Question 1. Moles = (8/16) = 0.5 mol Some Basic Concepts of Chemistry. (b) Atomic Number FSC students with pre-medical and pre-engineering studies are asked to study chemistry subjects. Multiple Choice Questions (MCQ) for CBSE Class 11-science Chemistry chapters on Topperlearning. (c) 5 CBSE Worksheets for Class 11 Chemistry: One of the best teaching strategies employed in most classrooms today is Worksheets. Explanation: (Number of carbon atoms = moles of compound × number of C atoms per mol × Avogadro number) 6g ethane (C2H6 two atoms of C per mole) = 6.02 × 1023 molecules Consider the combinations AB, AB. The significant figures in 3400 are (b) 0.2 M Which of the following cannot give iodometric titrations These MCQ's are extremely critical for all CBSE students to score better marks. Atom in highest oxidation state can oxidize iodide to liberate I2 which is volumetrically measured by iodometric titration using hypo. (a) 0.1 N = 0.12 The molar mass of Which of the following statements about a compound is incorrect? Which of the following terms are unitless? Now no. Chemistry Class 11 Important Questions are very helpful to score high marks in board exams. https://www.evidyarthi.in › cbse › classxi › chemistry › mcqs-21 Explanation: (1) 45.0 g conc. Volume of a solution changes with change in temperature, then, will the molality of the solution be affected by temperature? Two particles that have different numbers of electrons (the smallest particle in an atom which is negative) start reacting to each other. Explanation: CBSE Class 11 Chemistry Worksheet for students has been used by teachers & students to develop logical, lingual, analytical, and problem-solving capabilities. Another box contains identical blue coloured balls, labelled as B, each weighing 5 grams. (ii) A compound cannot be separated into its constituent elements by physical methods of separation. Question 7. The number of moles present in 6 gms of carbon is: Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below. Number of carbon atoms = 0.5 × 1 × NA = 0.5 NA (c) Give one example related to this law. NEET 2021 Chemistry syllabus. (a) 2 t = 0 40ml 0 Correct reading of mass is 3.0 g. On the basis of given data, mark the correct option out of the following statements. Give reason for your answer. Molecular weight of The reactant which is entirely consumed in reaction is known as limiting reagent. (c) 2.0 N Register online for Chemistry tuition on Vedantu.com to score more marks in your examination. (a) 2 Register online for Chemistry tuition on … MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. (d) 0.25 M, Answer: (b) 0.2 M The total number of ions present in 111 g of CaCl2 is (b) 20 ml We hope the given NCERT MCQ Questions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry with Answers Pdf free download will help you. The number of atoms present in 0.1 moles of a triatomic gas is. (ii) Total mass of reactants = total mass of product; therefore, law of multiple proportions is followed. Importance of Study of Chemistry Science is a bridge to understand the nature. What is the concentration of nitrate ions if equal volumes of 0.1 MAgNO3 and 0.1 M NaCl are mixed together (a) CHO Question 2. Answer: (a) Kelvin (a) One Mole HNO 3 (3) 70.0 g conc. Which of the following statements indicates that law of multiple proportion is being followed. The number of moles present in 6 gms of carbon is: (b) Cu2+ or own an. (c) 0.05 M Chemistry Important Questions Class 11 are given below. (d) Atomic Volume. Ions in one calcium chloride molecule = Ca+2 + 2Cl– = 3 ions (iv) Results of student B are both precise and accurate. (a) Fe3+ CBSE Important Questions Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry. Moles = (6/30) = 0.2 mol Explanation: of NO–2 Explanation: = 3 × 1 = 3. NCERT Exemplar Class 11 Chemistry is very important resource for students preparing for XI Board Examination. What will be the molality of the solution containing 18.25 g of HCl gas in 500 g of water? Instructions:-All the questions are compulsory. (b) 36.3 (b) Cation Download CBSE Class 11 Chemistry Some Basic Concepts of Chemistry MCQs Set B in pdf, Chemistry chapter wise Multiple Choice Questions free, Question: A mixture of sand and iodine can be separated bya) sublimationb) crystallisationc) distillationd) fractionationAnswer: sublimation Here you can get Class 11 Important Questions Chemistry based on NCERT Text book for Class XI. What will this reading be on Celsius scale? NH3(g) + HCl(g)→ NH4Cl(s) This document is highly rated by MBBS students and has been viewed 5175 times. Unit 1 Some Basic Concepts of Chemistry General introduction, Importance and scope of chemistry, Historical approach to particulate nature of matter, Laws of chemical combination, Dalton’s atomic theory, Atomic and molecular masses, Mole concept and molar mass, Stoichiometry and calculations based on stoichiometry. What is the symbol for SI unit of mole? (a) 0.1 M 12C is 12.0 gmol-1. If you have any queries regarding CBSE Class 11 Chemistry Some Basic Concepts of Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon. So number of ions in 111g/mol of CaCl2 (iii) A compound retains the physical properties of its constituent elements. Multiple Choice Questions (MCQ) for Formulation and Calculation - CBSE Class 11-science Chemistry on Topperlearning. What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL? combinations of atoms: their composition, structure, properties, behaviour and the changes they undergo during a reaction with other compounds.. Chemistry Basic Concept MCQs. b) These multiple choice questions for Chemistry Class 11 will help to improve analytical and complex problem decoding skills. (ii) Results of student A are both precise and accurate. Thus (6.0 g)/ (12.0 gmol-1) = 0.50 mol. (iii) Results of student B are neither precise nor accurate. We have provided Organic Chemistry: Some Basic Principles and Techniques Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. Approximate atomic weight of an element is 26.89. Hence % of M= [(m)/ (m+222)] × 100 = 9.87(given) MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. Given that: – 6.0 g. 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. But as the volume is doubled, conc. If 500 mL of a 5M solution is diluted to 1500 mL, what will be the molarity of the solution obtained? Moles = (21/44) =0.48 mol Explanation: The S.I unit of temperature is : H3PO4 is tribasic How many significant figures should be present in the answer of the following calculations? (b) 0.5 Assertion (A) : Significant figures for 0.200 is 3 where as for 200 it is 1. (a) 40.3 The empirical formula and molecular mass of a compound are CH, If the density of a solution is 3.12 g mL. In the following questions two or more options may be correct. HNO 3 The reaction is given below: If two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in whole number ratio. (c) 2.0 N Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject. Assertion (A) : Combustion of 16 g of methane gives 18 g of water. RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. Chemistry Class 11 Important Questions are very helpful to score high marks in board exams. A box contains some identical red coloured balls, labelled as A, each weighing 2 grams. 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 … Class 11 Chemistry Some Basic Concepts of Chemistry have different set of questions. The SI unit of temperature is the Kelvin. = 24.3. (a) One g – atom of nitrogen 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. Question 5. (c) 40 ml of NO–3 = \(\frac { (0.1) }{ (2) } \) (c) 17.8 (d) Ag+, Answer: (c) Pb2+ Which of the following element contains the greatest number of atoms? These are some of the random multiple question answers from Some Basic Concept of Chemistry... 1. (a) Kelvin A measured temperature on Fahrenheit scale is 200 °F. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. What is the concentration of nitrate ions if equal volumes of 0.1 M AgNO3 and 0.1 M NaCl are mixed together NCERT Exemplar Class 11 Chemistry is very important resource for students preparing for XI Board Examination. 28g CO Explanation: At an intermediate level, it is not so easy. The -ve charged particles is called: (b) Two Mole Chemistry Important Questions Class 11 are given below. In the reaction 2A + 4B → 3C + 4D, when 5 moles of A react with 6 moles of B, then, Match the following physical quantities with units. The questions includes 1 mark questions, 2 mark questions, 3 mark questions, 4 mark questions, 5 mark questions and other questions as per the latest CBSE curriculum for the current session. Number of carbon atoms = 0.48 × 3 × NA = 1.44 NA 8g methane (CH4) Calculate the average atomic mass of hydrogen using the following data : Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Explanation: (b) 8.9 (Valency = (26.89)/(8.9) ≈ 3). Its elemental analysis gave C, 38.71% and H, 9.67%. So, they are recommended to solve these important questions before appearing for the annual exam. What is the mass percent of carbon in carbon dioxide? Thus, some water molecules may be evaporated at high temp. (a) 1.806 × 1023. HNO 3 (2) 90.0 g conc. Scientists discovered absolute zero when they figured that as temperature decreases, the volume of a gas also gets smaller. NA (Avogadros number = 6.022 × 1023) (a) Anion To ease the pressure students must go for the textbook solutions as these clear the basics and also explains the entire chapter in the form of question and answers. 100 m = (9.87 m + 222 × 9.87) The number of atoms present in one mole of an element is equal to Avogadro number. 12C atoms have a mass of 12.0 g. Explanation: (d) 3.0 N, Question 18. (a) 2 =(8.9 × 3) = 26.7 Answer: (c) Kg/m² Which of the following reactions is not correct according to the law of conservation of mass. You will be able to view the results only after attempting all the questions. (ii) Both A and R are true but R is not the correct explanation of A. (iv) The ratio of atoms of different elements in a compound is fixed. … What is the difference between molality and molarity? 1. t = t 20ml solid Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject. (a) One g – atom of nitrogen If its equivalent weight is 8.9, the exact atomic weight of element would be By practising these questions, students can answer any type of question during the exam. 0.1M AgNO3 will react with 0.1M NaCl to form 0.1M NaNO3. Question 10. Which of the following weighs the most? (d) 0.25 M, Answer: (c) 0.05 M (d) 1. CBSE Class 11 - Chemistry - CH1 - Mole Concept Q1: Define mole Answer : A mole (or mol) is defined as the amount of substance which contains equal number of particles (atoms / molecules / ions) as there are atoms in exactly 12.000g of carbon-12. (d) 26.7. Question 16. Explanation: One mole of oxygen gas at STP is equal to _______. (b) One mole of water (iii) When magnesium burns in oxygen, the amount of magnesium taken for the reaction is equal to the amount of magnesium in magnesium oxide formed. Given that: – 6.0 g. CBSE 11 Chemistry 01 Some Basic Concepts of Chemistry 28 Topics | 29 Quizzes 01.21 Empirical Formula and Molecular Formula 1.21 Empirical Formula and Molecular Formula. (a) Molality. (i) Both A and R are true but R is not the correct explanation of A. Answer: (c) 24.3 How does this law point to the existance of atoms? Define the law of multiple proportions. (c) One mole of sodium As we know that all non-zero unit are significant number. 2I– →I2 (d) One molecule of H2SO4, Question 19. Which is not a unit of pressure: (c) Mole fraction. As the given sulphate is isomorphous with ZnSO4.7H2O its formula would be MSO4.7H2O.m is the atomic weight of M, molecular weight of MSO4.7H2O There are some basic concepts which help us to understand chemistry better. (b) 0.2 M 20. (b) 0.5 An organic compound contains carbon , hydrogen and oxygen. Assertion (A) : One atomic mass unit is defined as one twelfth of the mass of one carbon-12 atom. Thus (6.0 g)/ (12.0 gmol-1) = 0.50 mol. Number of carbon atoms = 0.2 × 2 × NA = 0.4 NA = 3 × 6.02 × 1023 ions Question 8. (b) 1.0 N Answer: (b) 0.5 Answer: (c) Atomicity (d) 4. (a) 6.0 g Ethane Pb+2 → Lowest oxidation state cannot oxidise iodide to I2, Question 12. (c) 0.05 M Moles of carbon = (6/12) = 0.5 mol (c) Kg/m² We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. These MCQ's are extremely critical for all CBSE students to score better marks. Become our. (ii) Both A and R are true but R is not a correct explanation of A. (b) Molarity. (d) Atom. Answer: (b) 5 MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. 1 CBSE Class 11 Chemistry – Chapter wise Important Questions. They graphed this relationship and found that for each substance tested, zero volume for each substance would hypothetically occur around minus 273 degrees Celsius, the equivalent of absolute zero. (i) Results of both the students are neither accurate nor precise. In the Kelvin scale, the lowest possible temperature is 0 K. This reading is called absolute zero; however, nothing could possibly ever reach this temperature. = (m + 32 + 64 + 126) = (m + 222) Class 11th Chemistry - 1 Some Basic Concepts of Chemistry MCQs 2. Answer: (a) Anion One of the statements of Dalton’s atomic theory is given below: What will be the mass of one atom of C-12 in grams? Number of carbon atoms (d) CH2O, Question 11. (d) 28.0 g CO, Answer: (b) 8.0 g Methane Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. HNO 3 (4) 54.0 g conc. Also Access CBSE Class 11 chemistry Sample Papers. To get fastest exam alerts and government job alerts in India, join our Telegram channel. (d) 1. Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry with Answers Pdf free download. = 3 moles. Some Basic Concepts of Chemistry Class 11 MCQ. Go Back to Chemistry Home Page Physics Maths Biology. (c) One mole of sodium Benefits of CBSE NCERT MCQs for Class 11 Chemistry. a) NCERT CBSE KVS Class 11 Chemistry MCQs will help the kids to strengthen concepts and improve marks in tests and exams. High quality research in physical chemistry, chemical physics and biophysical chemistry. Chemistry is the branch of science which deals with the compounds composed of atoms, i.e. Class 11th Chemistry Video Solution for Some Basic Concepts of Chemistry. Assertion (A) : The empirical mass of ethene is half of its molecular mass. In the definition of mole, the number of elementary entities present in a substance is compared with ____. Question 17. One becomes positive because it lost an electron, and the other negative because it got another electron. JEE Main 2020 & NEET 2020: Check important multiple choice questions (with answers) based on NCERT book of CBSE Class 11 Chemistry (Chapter 1 - Some Basic Concepts of Chemistry). 12C atoms have a mass of 12.0 g. Question 3. (b) 8.0 g Methane Which of the following terms are unitless? You also get idea about the type of questions and method to answer in your Class 11th examination. (b) 5 (d) Mass … How is the mole defined? (c) Fahrenheit The two particles become attracted to each other and mix together, making a new kind of particle. (i) Sample of carbon dioxide taken from any source will always have carbon and oxygen in the ratio 1:2. The particle that has the greater amount of electrons takes the other particles electrons. Under similar conditions of pressure and temperature, 40 ml of slightly moist hydrogen chloride gas is mixed with 20 ml of ammonia gas, the final volume of gas at the same temperature and pressure will be 21g propane (C3H8) Sulphuric acid reacts with sodium hydroxide as follows : Which of the following pairs have the same number of atoms? (d) 60 ml. CaCl2 = 111g/mol Contents. 1 Some Basic Concepts of Chemistry MCQs. (a) 0.5 N Academic Partner. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11. Chemistry Chapters MCQs Test Class 11: Chemistry is the main subject of the science group at the intermediate level of education. elements, and molecules, i.e. (a) Atomic Mass 12C is 12.0 gmol-1. Water boils at 373 Kelvin and freezes at 273 Kelvin. Which of the following weighs the most? Calculate the mass percent of calcium, phosphorus and oxygen in calcium phosphate Ca. = 0.05 M, Question 4. (b) 1.0 N 45.4 L of dinitrogen reacted with 22.7 L of dioxygen and 45.4 L of nitrous oxide was formed. The test consists 30 questions. Or 90.13 m = (222 × 9.87) A vessel contains 1.6 g of dioxygen at STP (273.15K, 1 atm pressure). (a) Bar (c) 24.3 The diameter of an atom is in the order of of molecules in 111g/mol of CaCl2 = Avogadros number 0.1 M AgNOA will react with 0.1 M NaCl to form 0.1 M NaNOA. Structure of Atom. A symbol not only represents the name of the element but also represents (d) 11.3. Question 6. Explanation: What is the normality of a 1 M solution of H3PO4 What is the normality of a 1 M solution of H3PO4 Which of the following statements is correct about the reaction given below: (i) Total mass of iron and oxygen in reactants = total mass of iron and oxygen in product therefore it follows law of conservation of mass. Explanation: (a) 0.5 N (c) Radical These are state of a matter, nature, physical and chemical properties, moles and molar mass, composition and various basic laws like Avogadro’s law, Dalton’s theory, etc. Explanation: Concise Mathematics Class 10 ICSE Solutions 2018, MCQ Questions for Class 11 Chemistry with Answers, CBSE Important Extra Questions for Class 12 Sociology Chapter Wise, MCQ Questions for Class 12 Political Science Chapter 5 Contemporary South Asia with Answers, Geography Class 12 Important Questions Chapter 2 Data Processing, MCQ Questions for Class 12 Political Science Chapter 4 Alternative Centres of Power with Answers, MCQ Questions for Class 12 Political Science Chapter 3 US Hegemony in World Politics with Answers, MCQ Questions for Class 12 Political Science Chapter 2 The End of Bipolarity with Answers, Political Science Class 12 Important Questions Chapter 2 The End of Bipolarity, MCQ Questions for Class 12 Political Science Chapter 1 The Cold War Era with Answers, MCQ Questions for Class 12 Geography Chapter 12 Geographical Perspective on Selected Issues and Problems with Answers, Concise Mathematics Class 10 ICSE Solutions. 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( \frac { ( 0.1 ) } \ ) = 0.05 M, 13! Be present in a substance is compared with ____ free download an atom which is entirely consumed in reaction known... By temperature methods of separation there are Some of the following statements dinitrogen reacted with 22.7 of. Balls, labelled as b, each weighing 2 grams the type of question during the exam element contains greatest... In 200 mL of a compound are CH, if the density of a triatomic gas is now to!: Solid Liquid gas all of the solution obtained twelfth of the choices below. That has the greater amount of electrons ( the smallest particle in an atom is in the 1:2.