# some basic concepts of chemistry class 11 mcq with answers

(b) Celsius (iii) Amount of Fe 2 O 3 can be increased by taking any one of the reactants (iron or oxygen) in excess. The two particles become attracted to each other and mix together, making a new kind of particle. (c) CH3O Pressure is force per unit area so Kg/m² cannot be a unit of pressure. How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO 3?The concentrated acid is 70% HNO 3. Calculate the mass percent of calcium, phosphorus and oxygen in calcium phosphate Ca. (b) 20 ml Molecular weight of of molecules in 111g/mol of CaCl2 = Avogadros number At an intermediate level, it is not so easy. A measured temperature on Fahrenheit scale is 200 °F. You will be able to view the results only after attempting all the questions. Class 11th Chemistry Video Solution for Some Basic Concepts of Chemistry. Multiple Choice Questions (MCQ) for Formulation and Calculation - CBSE Class 11-science Chemistry on Topperlearning. The density of 3 molal solution of NaOH is 1.110 g mL. Some Basic Concepts of Chemistry. (i) Both A and R are true and R is the correct explanation of A. (Valency = (26.89)/(8.9) ≈ 3). CBSE Important Questions for Class 11 Chemistry, NCERT Important Questions for Class 11 Chemistry, NCERT Solutions for Class 8 Sanskrit Chapter 11 सावित्री बाई फुले, NCERT Solutions for Class 12th Macroeconomics : Chapter 6 – Open Economy Macroeconomics, Class 11 Important Questions for Chemistry - Structure of Atom. Class 11th Chemistry - 1 Some Basic Concepts of Chemistry MCQs 2. Multiple Choice … Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11.. Explanation: Two particles that have different numbers of electrons (the smallest particle in an atom which is negative) start reacting to each other. Correct reading of mass is 3.0 g. On the basis of given data, mark the correct option out of the following statements. Which of the following weighs the most? Chemistry Class 11 Important Questions are very helpful to score high marks in board exams. Some Basic Concepts of Chemistry Class 11 MCQ. https://www.evidyarthi.in › cbse › classxi › chemistry › mcqs-21 (d) CH2O, Question 11. Academic Partner. (c) 17.8 Question 20. Question 3. Although the Celsius temperature scale is also used, it is considered a derived SI unit and is generally used to measure everyday temperatures. 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. Chapter 3 - Classification of Elements & Periodicity in Properties 11 videos | 13 docs | 10 tests Test: … The test consists 30 questions. 6g ethane (C2H6 two atoms of C per mole) (a) 0.1 M Explanation: 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: (b) 1.806 × 1022. There are some basic concepts which help us to understand chemistry better. (b) CH4O 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. Its elemental analysis gave C, 38.71% and H, 9.67%. (a) Bar (a) Fe3+ A symbol not only represents the name of the element but also represents Explanation: b) These multiple choice questions for Chemistry Class 11 will help to improve analytical and complex problem decoding skills. 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. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11. How many significant figures should be present in the answer of the following calculations? 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). (a) One g – atom of nitrogen MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. Assertion (A) : Combustion of 16 g of methane gives 18 g of water. Answer: (a) Anion Here you can get Class 11 Important Questions Chemistry based on NCERT Text book for Class XI. 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. The diameter of an atom is in the order of Thus, some water molecules may be evaporated at high temp. (c) Radical Answer: (c) 24.3 Water boils at 373 Kelvin and freezes at 273 Kelvin. Moles = (8/16) = 0.5 mol NA (Avogadros number = 6.022 × 1023) (i) Results of both the students are neither accurate nor precise. One mole of any substance contains 6.022 × 10. If its equivalent weight is 8.9, the exact atomic weight of element would be (c) 0.05 M (c) Mole fraction. The -ve charged particles is called: 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? (a) Kelvin NEET 2021 Chemistry syllabus. Answer: (c) Three Mole (d) 0.25 M, Answer: (b) 0.2 M Moles = (28/28) =1 mol (c) 5 What is the difference between molality and molarity? (a) 2 Question 1. Give reason for your answer. Question 16. CBSE / NCERT MCQ's for Chemistry Class 11th Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject. 12C is 12.0 gmol-1. (iii) Results of student B are neither precise nor accurate. (a) One g – atom of nitrogen Approximate atomic weight of an element is 26.89. (d) 4. (b) 1.0 N (d) One molecule of H2SO4, Question 9. (c) Atomicity HNO 3 Or (c) 24.3 This document is highly rated by MBBS students and has been viewed 5175 times. (a) 2 One becomes positive because it lost an electron, and the other negative because it got another electron. The particle that has the greater amount of electrons takes the other particles electrons. 6g carbon What is the concentration of nitrate ions if equal volumes of 0.1 M AgNO3 and 0.1 M NaCl are mixed together A charged particle, also called an ion, is an atom with a positive or negative charge. (d) 3.0 N, Question 18. Number of carbon atoms = 0.5 × 1 × NA = 0.5 NA or own an. Sulphuric acid reacts with sodium hydroxide as follows : Which of the following pairs have the same number of atoms? (iv) At constant temperature and pressure 200 mL of hydrogen will combine with 100 mL oxygen to produce 200 mL of water vapour. The significant figures in 3400 are Assertion (A) : Significant figures for 0.200 is 3 where as for 200 it is 1. What will be the molality of the solution containing 18.25 g of HCl gas in 500 g of water? (d) 1. Atom in highest oxidation state can oxidize iodide to liberate I2 which is volumetrically measured by iodometric titration using hypo. (b) Atomic Number CBSE Important Questions Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry. FSC students with pre-medical and pre-engineering studies are asked to study chemistry subjects. Question 2. Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject. (d) Torr. 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. What is the normality of a 1 M solution of H3PO4 The empirical formula and molecular mass of a compound are CH, If the density of a solution is 3.12 g mL. Given that: – 6.0 g. 21g propane (C3H8) NCERT Exemplar Class 11 Chemistry is very important resource for students preparing for XI Board Examination. (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. The molar mass of 2. MCQs of chemistry class 11 chapter 1 Somebasic concepts of chemistry, useful for CBSE, NEET, IIT JEE and CET exam preparation, find more@learnfatafat. (a) 100 ml 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. Question from very important topics are covered by NCERT Exemplar Class 11. These MCQ's are extremely critical for all CBSE students to score better marks. One mole of oxygen gas at STP is equal to _______. So number of ions in 111g/mol of CaCl2 (b) 0.2 M (b) 8.9 Question 5. Moles = (21/44) =0.48 mol of NO–3 = $$\frac { (0.1) }{ (2) }$$ CBSE Worksheets for Class 11 Chemistry: One of the best teaching strategies employed in most classrooms today is Worksheets. 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. H3PO4 is tribasic (1) 45.0 g conc. The number of moles present in 6 gms of carbon is: Following reaction takes place. combinations of atoms: their composition, structure, properties, behaviour and the changes they undergo during a reaction with other compounds.. Chemistry Basic Concept MCQs. (c) 2.0 N = 0.05 M, Question 4. RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. (a) 2 A vessel contains 1.6 g of dioxygen at STP (273.15K, 1 atm pressure). But as the volume doubled, conc. 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. Answer: (c) Kg/m² = 3 moles. Which of the following contains same number of carbon atoms as are in 6.0 g of carbon (C – 12)? Moles of carbon = (6/12) = 0.5 mol t = t 20ml solid (c) 40 ml Answer: (a) Kelvin elements, and molecules, i.e. An organic compound contains carbon , hydrogen and oxygen. (ii) Total mass of reactants = total mass of product; therefore, law of multiple proportions is followed. (iv) Results of student B are both precise and accurate. Explanation: Explanation: (d) 1. Scientists discovered absolute zero when they figured that as temperature decreases, the volume of a gas also gets smaller. 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. The number of moles present in 6 gms of carbon is: Another box contains identical blue coloured balls, labelled as B, each weighing 5 grams. 0.1M AgNO3 will react with 0.1M NaCl to form 0.1M NaNO3. Go Back to Chemistry Home Page Physics Maths Biology. The number of atoms present in 0.1 moles of a triatomic gas is. (c) 0.05 M (d) Atom. (c) Three Mole 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 … These MCQ's are extremely critical for all CBSE students to score better marks. 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. (d) 0.25 M, Answer: (c) 0.05 M (ii) Both A and R are true but R is not the correct explanation of A. Benefits of CBSE NCERT MCQs for Class 11 Chemistry. Question 6. Which of the following statements about a compound is incorrect? Final volume = 20ml. 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 normality of a 1 M solution of H3PO4 Explanation: Chemistry Class 11 Important Questions are very helpful to score high marks in board exams. What is the mass percent of carbon in carbon dioxide? The sulphate of a metal M contains 9.87% of M. This sulphate is isomorphous with ZnSO4.7H2O. (b) 36.3 A box contains some identical red coloured balls, labelled as A, each weighing 2 grams. (b) 0.5 0.1 M AgNOA will react with 0.1 M NaCl to form 0.1 M NaNOA. 45.4 L of dinitrogen reacted with 22.7 L of dioxygen and 45.4 L of nitrous oxide was formed. (a) 40.3 Class 11 Chemistry Some Basic Concepts of Chemistry have different set of questions. (iv) The ratio of atoms of different elements in a compound is fixed. (b) N/m² Which of the following weighs the most? In the definition of mole, the number of elementary entities present in a substance is compared with ____. (A) In Agriculture and Food: (i) It has provided chemical fertilizers such as urea, calcium phosphate, … Explanation: The molar mass of Hence % of M= [(m)/ (m+222)] × 100 = 9.87(given) Assertion (A) : The empirical mass of ethene is half of its molecular mass. (b) One mole of water (c) One mole of sodium Explanation: (iii) A compound retains the physical properties of its constituent elements. (b) 8.0 g Methane (b) 0.5 (c) 21.0 g Propane Atomic weight = (Equivalent weight × Valency) (d) 28.0 g CO, Answer: (b) 8.0 g Methane (iv) Amount of Fe 2 O 3 produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess. We can get the answers of many such questions with the help of basic concepts of chemistry (Chapter 1 of Class 11). How does this law point to the existance of atoms? HNO 3 (4) 54.0 g conc. (a) Anion (a) Molality. (c) Give one example related to this law. 12C atoms have a mass of 12.0 g. Answer: (b) 0.5 (c) 2.0 N 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 Answer: (d) 26.7 MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. (d) 3.0 N. Answer: (d) 3.0 N Free Question Bank for NEET Chemistry Some Basic Concepts of Chemistry Become our. Explanation: Moles = (6/30) = 0.2 mol = 24.3. Explanation: 8g methane (CH4) Question 8. The empirical formula of the compound would be Register online for Chemistry tuition on … We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the concept … The SI unit of temperature is the Kelvin. (b) 0.2 M Answer: (b) 20 ml MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. (b) Two Mole (i) Both A and R are true but R is not the correct explanation of A. Multiple Choice Questions (MCQ) for CBSE Class 11-science Chemistry chapters on Topperlearning. Instructions:-All the questions are compulsory. Explanation: 2I– →I2 20. Which of the following solutions have the same concentration? 1 Some Basic Concepts of Chemistry MCQs. (d) One molecule of H2SO4, Question 19. = 3 × 1 = 3. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Some Basic Concepts of Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. Number of carbon atoms t = 0 40ml 0 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. = 0.05 M, Question 13. Answer: (b) 0.5 Now no. (ii) Results of student A are both precise and accurate. (a) 0.5 N Answer: (b) 5 To get fastest exam alerts and government job alerts in India, join our Telegram channel. Choose the correct option out of the choices given below each question. (d) 26.7. (a) 0.5 N So N = 3M = 0.5 × NA =0.5NA (NA is Avogadro number) a) NCERT CBSE KVS Class 11 Chemistry MCQs will help the kids to strengthen concepts and improve marks in tests and exams. (b) 5 Thus (6.0 g)/ (12.0 gmol-1) = 0.50 mol. Explain it with two examples. 28g CO Contents. The number of atoms present in one mole of an element is equal to Avogadro number. =(8.9 × 3) = 26.7 NH3(g) + HCl(g)→ NH4Cl(s) 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. HNO 3 (3) 70.0 g conc. What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL? of NO–2 (d) Centigrade. Question 17. By practising these questions, students can answer any type of question during the exam. Number of carbon atoms = 1 × 1 × NA = NA, Question 15. (ii) 0.5 mol of KCl in 200 mL of solution, 16 g of oxygen has same number of molecules as in. In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. How is the mole defined? (ii) A compound cannot be separated into its constituent elements by physical methods of separation. CaCl2 = 111g/mol 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. (i) Sample of carbon dioxide taken from any source will always have carbon and oxygen in the ratio 1:2. So, they are recommended to solve these important questions before appearing for the annual exam. The total number of ions present in 111 g of CaCl2 is The atomic weight of M is (b) Cation (d) Mass … Or 90.13 m = (222 × 9.87) Explanation: Chemistry Chapters MCQs Test Class 11: Chemistry is the main subject of the science group at the intermediate level of education. Ions in one calcium chloride molecule = Ca+2 + 2Cl– = 3 ions 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 HNO 3 (2) 90.0 g conc. 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Answer: (c) Atomicity 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. Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry with Answers Pdf free download. These are some of the random multiple question answers from Some Basic Concept of Chemistry... 1. Free PDF download of Important Questions for CBSE Class 11 Chemistry Chapter 12 - Organic Chemistry - Some Basic Principles and Techniques prepared by expert Chemistry teachers from latest edition of CBSE(NCERT) books. Which of the following cannot give iodometric titrations The S.I unit of temperature is : Number of carbon atoms = 0.2 × 2 × NA = 0.4 NA 100 m = (9.87 m + 222 × 9.87) (a) CHO Register online for Chemistry tuition on Vedantu.com to score more marks in your examination. (b) One mole of water You also get idea about the type of questions and method to answer in your Class 11th examination. Number of carbon atoms = 0.48 × 3 × NA = 1.44 NA This happens whenever something called an ionic bond forms. Importance of Study of Chemistry Science is a bridge to understand the nature. (c) One mole of sodium (d) Atomic Volume. Which of the following reactions is not correct according to the law of conservation of mass. Pb+2 → Lowest oxidation state cannot oxidise iodide to I2, Question 12. Question 14. (Number of carbon atoms = moles of compound × number of C atoms per mol × Avogadro number) Absolute zero, according to the Celsius scale, is approximately minus 273 degrees Celsius. = 6.02 × 1023 molecules = 0.12 If 500 mL of a 5M solution is diluted to 1500 mL, what will be the molarity of the solution obtained? As we know that all non-zero unit are significant number. Explanation: It is compulsory for those who choose the science group. Chemistry is the branch of science which deals with the compounds composed of atoms, i.e. (b) Molarity. But as the volume is doubled, conc. Which of the following element contains the greatest number of atoms? What will this reading be on Celsius scale? (a) Atomic Mass Chemistry Important Questions Class 11 are given below. Consider the combinations AB, AB. (a) 1.806 × 1023. Symbol of an element represents the name along with the number of same atoms in room condition, which is its atomicity, of that element. Thus (6.0 g)/ (12.0 gmol-1) = 0.50 mol. (c) 6 12C is 12.0 gmol-1. Given that: – 6.0 g. Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below. (a) One Mole (ii) Both A and R are true but R is not a correct explanation of A. (i) Both A and R are true and R is correct explanation of A. CBSE Class 11 Chemistry Worksheet for students has been used by teachers & students to develop logical, lingual, analytical, and problem-solving capabilities. Define the law of multiple proportions. 1. Which is not a unit of pressure: (c) Fahrenheit The gas is now transferred to another vessel at constant temperature, where pressure becomes half of the original pressure. 12C atoms have a mass of 12.0 g. Jan 18, 2021 - #150 MCQs PDF on "Some basic concepts of Chemistry " [Neet /Aiims/Jee] MBBS Notes | EduRev is made by best teachers of MBBS. Explanation: NA (Avogadros number = 6.022×1023) Chemistry Important Questions Class 11 are given below. Which of the following terms are unitless? (a) 0.1 N (d) Four Mole.