Page 1 LEARNERS HABITAT 1] A spherical balloon of 21 cm diameter and 4.851 L volume is to be filled with hydrogen at NTP from a cylinder containing the gas at 20 atm and 27 0 C. The cylinder can hold 2.82 L of water at NTP. What will be the number of balloons that can be filled up? a) 5 b) 10 c) 15 d) 20 2] An L. P. G. cylinder contains 15 kg of butane gas at 27 0 C and 10 atmospheric pressure. It was leaking and its pressure fell down to 8 atmospheric pressure after one day. The gas leaked in 5 days is a) 10 kg b) 3 kg c) 15 kg d) 12 kg 3] A flask containing air (open to the atmosphere) is heated from 300 K to 500 K. then % of air escaped to the atmosphere is a) 20.0 b) 40 c) 60 d) 80 4] For X g of ideal gas V and V 0 are the volumes at t 0 C and 0 0 C respectively at 1 atm pressure so that V/V0 = (1 + ? t). Here, ? is a) < 1 b) < 0 c) > 1 d) = 0 5] The values of critical temperatures (Tc) and critical pressure (Pc) for some gases are given below. Which of the gases cannot be liquefied at 100 K and 50 atm? Gases A B C D P c(atm) 2.2 14 35 45 Tc(K) 5.1 33 127 140 a) D only b) A only c) A and b d) C and D 6] The compressibility of gas < unity at STP. Therefore a) V m = 22.4 L b) V m < 22.4 L c) V m = 22.4 L d) V m = 44.8 L 7] Open end manometer was connected to gas chamber. The Hg level stood 15 mm higher in the open end as compared to the end connected to gas chamber. If the atmospheric pressure is 101.3 kPa. The gas pressure in kPa is a) 103.3 b) 101.3 c) 94.3 d) 115.3 8] What is wrong about the 50 L vessel that contains dioxygen and dihydrogen in the molar ratio of 1:1, at a pressure 101.3 kPa? a) H2 molecules move faster than oxygen b) Each gas has same number of molecules c) If O2 is removed from the mixture, the pressure will fall to 25.3 kPa d) On the average, the molecular impacts of H 2 on the walls per unit time are larger than those of oxygen 9] 5.0 dm 3 of water is placed in a closed room of volumes 2.5 x 10 4 dm3 at 300 k if vapour pressure of water is 0.036 bars and its density is 0.990 g cm -3 , the volume of water left in liquid state is a) 4.34 dm 3 b) 3.44 dm 3 c) 2.5dm 3 d) 4.5 dm 3 LH Practice Sheet GASEOUS STATE LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 www.learnershabitat.ac.in Page 1Read More

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