A gas occupied a volume of 250 ml at 700 mm Hg pressure and 25°C. What additional pressure is required to reduce the gas volume to its 4/5^th value at the same temperature

(1) 225 mm Hg

(2) 175 mm Hg

(3) 150 mm Hg

(4) 265 mm Hg

A sealed tube which can withstand a pressure of 3 atmosphere is filled with air at ${27}^{o}C$ and 760 mm pressure. The temperature above which the tube will burst will be

(1) 900°C

(2) 627°C

(3) 726°C

(4) 1173°C

The pressure of 2 moles of an ideal gas at 546 K having volume 44.8 L is

(1) 2 atm

(2) 3 atm

(3) 4 atm

(4) 1 atm

3.2 g of oxygen (At. wt. = 16) and 0.2 g of hydrogen (At. wt. = 1) are placed in a 1.12 litre flask at 0°C. The total pressure of the gas mixture will be [CBSE PMT 1992]

(1) 1 atm

(2) 4 atm

(3) 3 atm

(4) 2 atm

Equal weights of methane and oxygen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by oxygen is 

(1) 1/3

(2) 1/2

(3) 2/3

(4) $1/3\times 273/298$  

The rate of diffusion of methane at a given temperature is twice that of gas X. The molecular weight of X is 

(1) 64.0

(2) 32.0

(3) 4.0

(4) 8.0

The kinetic energy for 14 grams of nitrogen gas at 127°C is nearly (mol. mass of nitrogen = 28 and gas constant = 8.31JK^–1mol^–1) 

(1) 1.0 J

(2) 4.15 J

(3) 2493 J

(4) 3.3 J

If the average velocity of N₂ molecules is 0.3 m/s at 27°C, then the velocity of 0.6 m/s will take place at 

(1) 273 K

(2) 927 K

(3) 1000 K

(4) 1200 K

A gas such as carbon monoxide would be most likely to obey the ideal gas law at

(1) high temperatures and low pressures

(2) low temperatures and high pressures

(3) high temperatures and high pressures

(4) low temperatures and low pressures

A gaseous mixture was prepared by taking equal moles of CO and N₂. If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N₂) in the mixture is

(a) 0.8 atm

(b) 0.9 aim

(c) 1 atm

(d) 0.5 atm