(i) Both A and R are true and R is the correct explanation of A. (A) 10.0 Assertion (A) : Combustion of 16 g of methane gives 18 g of water. (A) As+ of N/5 H 2 SO 4, 10 c.c. Chemistry Class 11 Important Questions are very helpful to score high marks in board exams. (iv) The ratio of atoms of different elements in a compound is fixed. (iv) Results of student B are both precise and accurate. of N/10 HNO 3 are mixed together. Sulphuric acid reacts with sodium hydroxide as follows : Which of the following pairs have the same number of atoms? Ans: The basic constituents of matter are atoms and molecules 3. (D) 6.02 × 1023, 6. Pressure has the same dimension as ____________ (a) 1.806 × 1023. Which of the following reactions is not correct according to the law of conservation of mass. Choose the correct option out of the choices given below each question. Elements X and Y combine to form two compounds XY and X2Y. 2. (B) energy 45.4 L of dinitrogen reacted with 22.7 L of dioxygen and 45.4 L of nitrous oxide was formed. A measured temperature on Fahrenheit scale is 200 °F. (A) 1.2 × 1023 Find the atomic weight of X and Y, if the weight of 0.1 moles of XY … What is the symbol for SI unit of mole? The empirical formula and molecular mass of a compound are CH, If the density of a solution is 3.12 g mL. (C) 18 grams of water (c) Give one example related to this law. A gas X has Cp and Cv ratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms 35.4 mL of HCl is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject. Define the law of multiple proportions. MCQs on Some Basic Concepts of Chemistry : Your email address will not be published. Which of the following terms are unitless? (B) 1.806 × 1022 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? (i) A molecule of a compound has atoms of different elements. (A) energy per unit volume (ii) A compound cannot be separated into its constituent elements by physical methods of separation. Home » NEET Chemistry Objective Questions » 300+ TOP MCQs on Some Basic Concepts of Chemistry and Answers, NEET Chemistry is the very imporatant paper in the Medical Entrance EXAM. These Topper’s Class typed/scanned notes of Some Basic Concept of Chemistry Handwritten Notes in Pdf will help you to understand all key concepts. Consider the combinations AB, AB. (D) 6.026 × 1022, 4. What are the basic constituents of matter? Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject. Assertion (A) : Significant figures for 0.200 is 3 where as for 200 it is 1. (C) 2.01 × 1023 (A) 18 molecules of water A box contains some identical red coloured balls, labelled as A, each weighing 2 grams. (B) 32 g/mole 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. (C) 6 L 0.97 N. 0.142 N . Mention any two life saving drugs Ans: 1. Which of the following solutions have the same concentration? 1. MCQs on Some Basic Concepts of Chemistry : 1. (A) 1.806 × 1023 What will this reading be on Celsius scale? (iv) At constant temperature and pressure 200 mL of hydrogen will combine with 100 mL oxygen to produce 200 mL of water vapour. Calculate, Calcium carbonate reacts with aqueous HCl to give CaCl. 11th Chemistry chapter 01 Some Basic Concepts of Chemistry have many topics. Which one will have maximum numbers of water molecules? (ii) 0.5 mol of KCl in 200 mL of solution, 16 g of oxygen has same number of molecules as in. One mole of oxygen gas at STP is equal to _______. of N/2 HCl and 30 c.c. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 11. (D) Be+, 7. What is the difference between molality and molarity? Hurry Up! (B) 11.2 The gas is now transferred to another vessel at constant temperature, where pressure becomes half of the original pressure. Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry with Answers Pdf free download. Give reason for your answer. Find out the average atomic weight of boron in the periodic table Which of the following statements indicates that law of multiple proportion is being followed. 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. (B) 8:1:2 Find all the NEET Chemistry important questions from the chapter Some Basic Concept of Chemistry With solutions to perform better in the exam here. (B) 3.01 × 1023 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. Find the atomic weight of X and Y, if the weight of 0.1 moles of XY is 10g and 0.05 moles of X2Y is 9g How many significant figures should be present in the answer of the following calculations?
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