Physics MCQs for NEET — Practice Questions with Answers

Positive deviation from ideal gas behaviour takes place. because of

Kinetic energy of 2 moles of $ N_2$ at $27 ^\circ$ C is (R = 8.324 $JK ^{-1}mol ^{-1} ) $

The root mean square velocity of one mole mass of amono atomic as having molar mass M is Urms. The relation between average kinetic energy (E) of the gas and Urms is (IIT screening - 2004)

Triple point of water is

The root mean square velocity of an ideal gas at constant pressure varies with density (d) as (IIT- 2001)

Match gases under specified conditions listed in column I with their properties in column II Column I

1. $H_2 $ (g) (P = 200 atm, T = 273 K)
2. $H_2 (g) (P V O ) , T =273 K)
3. $CO_2 (g) ( p = 1 atm , T= 273 K)
4. real gas $SO_2 $ with bigger size of its volume Column II a) z = { PV \over RT } \neq 1 $ b) Attractive forces are dominant c) PV = nRT d) P( V - nb) = nRT

column I

1. If force of attraition among the gaseous molecules are negligible 2)If the volume of the gas molecules are negligible
2. At STP
3. At low pressure and high temperature column II a) $ ( P + { a \over v ^2 } ) ( v - b ) = RT $ b) $ PV = RT - { a \over v } $ c ) PV = RT + PB d) PV = RT .

Which of the following statements is / are correct ? A) At high prssure, all real gases are less compressible than ideal gas. B)$ H_2 $ he gases are more compressible than ideal gas for all values of pressure C) $ compressiblity factor z = ( PV \over nRT) is less than 1 for all real gases at low pressure except H_2 $ and He D)The compressibility factor z of real gases are quite independent of temperature therefore z is not effected with change in temperature.

A gas Undergoes dissociation as $M_{ 4(q ) } \rightarrow 4M (g) $ in a closed rigid container having volume 22.4L at 273K If the initialmoles of $M_4$ taken befor dissoliciation is 1 then. The total pressure (in attm) after 50% completion of the reaction assuning ideal behaviour is

A gas Undergoes dissociation as $M_{ 4(q ) } \rightarrow 4M (g) $ in a closed rigid container having volume 22.4L at 273K If the initialmoles of $M_4$ taken befor dissoliciation is 1 then. If the gases are not ideal at the begining total pressure observed is less than 1 atm then