Title KINETIC THEORY.pdf ✅

CHAPTER KINETIC THEORY 12 Exercise 1: NCERT Based Topic-wise MCQs 12.1 & 12.2 INTRODUCTION, MOLECULAR NATURE OF MATTER 1. According to kinetic theory, the behaviour of gases based on the idea that gas consists of (a) rapidly moving atoms NCERT Page-325 / N-244 (b) rapidly moving elements (c) rapidly moving particles (d) none of these 12.3 BEHAVIOUR OF GASES 2. Kinetic theory of gases provide a base for NCERT Page - 323 / N-248 (a) Charle's law (b) Boyle's law (c) Both Charle's law and Boyle's law (d) None of these 3. When do real gases approach the ideal gas behaviour? NCERT Page-326 / N-247 (a) At low pressure and low temperature (b) At low pressure and high temperature (c) At high pressure and high temperature (d) At high pressure and low temperature 4. The equation which should be satisfied exactly at all pressures and temperatures to be an ideal gas is (a) PV = μRT NCERT Page-325 / N-246 (c) P = kBnT. (b) PV = kBNT (d) All of these 5. The density (ρ) versus pressuure (P) of a given mass of an ideal gas is shown at two temperatures T1 and T2 Then relation between T1 and T2 may be NCERT Page-326 / N-247 (a) T1 > T2 (b) T2 > T1 (c) T1 = T2 (d) All the three are possible 6. For Boyle's law to hold, the gas should be P → NCERT Page-326 / N-247
(a) perfect and of constant mass and temperature (b) real and of constant mass and temperature (c) perfect and constant temperature but variable mass (d) real and constant temperature but variable mass 7. Boyle' law is applicable for an NCERT/ Page-326/ N-247 (a) adiabatic process (c) isobaric process (b) isothermal process (d) isochoric process 8. The deviation of gases from the behaviour of ideal gas is due to NCERT Page-326 / N-247 (a) colourless molecules (b) covalent bonding of molecules (c) attraction of molecules (d) absolute scale of temp. 9. The given P − V curve is predicted by NCERT Page-326/ N-247 (a) Boyle's law (b) Charle's law (c) Avogadro's law (d) Gaylussac's law 10. What will be the ratio of number of molecules of a monoatomic and a diatomic gas in a vessel, if the ratio of their partial pressures is 5: 3 ? NCERT Page-326 / N-247 (a) 5: 1 (b) 3: 1 (c) 5: 3 (d) 3: 5 11. If the pressure and the volume of certain quantity of ideal gas are halved, then its temperature (a) is doubled NCERT Page-326/ N-247 (b) becomes one-fourth (c) remains constant (d) is halved 12. Which of the following graphs represent the behavior of an ideal gas ? Symbols have their usual meaning. NCERT Page-326/ N-247
(a) (b) (c) (d) 13. A gas in a container A is in thermal equilibrium with antoher gas of the same mass in container B. If we denote the corresponding pressures and volumes by the suffixes A and B, then which of the following statement is most likely to be true? NCERT Page-326/ N-247 (a) PA = PB, VA ≠ VB (b) PA ≠ PB, VA = VB (c) PA/VA = PB/VB (d) PAVA = PBVB 14. A vessel contains 16g of hydrogen and 128g of oxygen at standard temperature and pressure. The volume of the vessel in cm3 is : NCERT Page-326 / N-247 (a) 72 × 105 (b) 32 × 105 (c) 27 × 104 (d) 54 × 104 15. A vessel has 6g of hydrogen at pressure P and temperature 500K. A small hole is made in it so that hydrogen leaks out. How much hydrogen leaks out if the final pressure is P/2 and temperature falls to 300K ? (a) 2g NCERT Page-326 / N-247 (b) 3g (c) 4g (d) 1g 16. A mixture of hydrogen and oxygen has volume 2000cm3 , temperature 300K, pressure 100kPa and mass 0.76g. The ratio of number of moles of hydrogen to number of moles of oxygen in the mixture will be : (a) 1 3 NCERT Page-326/ N-247 (b) 2 1 (c) 1 16 (d) 16 1 17. A balloon contains 1500m3 of helium at 27∘C and 4 atmospheric pressure. The volume of helium at −3 ∘C temperature and 2 atmospheric pressure will, NCERT Page-326 / N-247 (a) 1500m3 (b) 1700m3 (c) 1900m3 (d) 2700m3
18. A perfect gas at 27∘C is heated at constant pressure so as to double its volume. The final temperature of the gas will be, close to NCERT Page-326 / N-247 (a) 327∘C (b) 200∘C (c). 54∘C (d) 300∘C 19. A mixture of hydrogen and oxygen has volume 500cm3 , temperature 300K, pressure 400kPa and mass 0.76g. The ratio of masses of oxygen to hydrogen will be :- NCERT Page-326 / N-247 (a) 3: 8 (b) 3: 16 (c) 16: 3 (d) 8: 3 20. Ratio of volume occupied by a gas H2 of mass 22gm at two different pressure p and 2p if temperature remains constant is NCERT Page-326 / N-247 (a) 1: 2 (b) 2: 1 (c) 1: 4 (d) 4: 1 21. P, V, T respectively denote pressure, volume and temperature of two gases. On mixing, new temperature and volume are respectively T and V. Final pressure of the mixture is NCERT Page-326 / N-247 (a) P (b) 2P (c) zero (d) 3P 22. If two vessels A and B contain the same gas but the volume of vessel A is twice that of B and temperature and pressure of gas A is twice that of gas in B, then the ratio of gas molecules in A and B is (a) 1: 2 NCERT Page-326 / N-247 (b) 1: 4 (c) 4: 1 (d) 2: 1 12.4 KINETIC THEORY OF AN IDEAL GAS 23. Molecules of a ideal gas behave like NCERT Page-328 / N-248, 249 (a) inelastic rigid sphere (b) perfectly elastic non-rigid sphere (c) perfectly elastic rigid sphere (d) inelastic non-rigid sphere 24. In kinetic theory of gases, it is assumed that molecules NCERT Page-328 / N-249 (a) have same mass but can have different volume (b) have same volume but mass can be different (c) have different mass as well as volume (d) have same mass but negligible volume. 25. What will be the effect on the root mean square velocity of oxygen molecules if the temperature is doubled and oxygen molecule dissociates into atomic oxygen? NCERT Page-330 / N-250 (a) The velocity of atomic oxygen remains same (b) The velocity of atomic oxygen doubles (c) The velocity of atomic oxygen becomes half