## In van der Waals equation of state of the gas law, the constant ‘b’ is a measure of

a) volume occupied by the molecules b) intermolecular attraction c) intermolecular repulsions d) intermolecular collisions per unit volume Answer: a

## As the temperature is raised from 20ºC to 40ºC, the average kinetic energy of neon atoms changes by a factor of which of the following ?

a) $313\diagup293$ b) $\sqrt{\left(313\diagup293\right)}$ c) $1\diagup2$ d) 2 Answer: a Explanation:

## According to the kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecule travels

a) in a wavy path b) in a straight line path c) with an accelerated velocity d) in a ...

## What volume of hydrogen gas, at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen ?

a) 67.2 L b) 44.8 L c) 22.4 L d) 89.6 L Answer: a Explanation: ...

## The heat required to raise the temperature of body by 1 K is called

a) specific heat b) thermal capacity c) water equivalent d) none of these Answer: b Explanation: The heat rquired ...

## Kinetic theory of gases proves

a) only Boyle’s law b) only Charles’ law c) only Avogadro’s law d) All of these Answer: d Explanation: All ...

## Value of gas constant R is

a) 0.082 litre atm b) $0.987 cal mol^{-}K^{-1}$ c) $8.3 J mol^{-}K^{-1}$ d) $83 erg mol^{-}K^{-1}$ Answer: c Explanation: ...

## For an ideal gas, number of moles per litre in terms of its presure P, gas constant R and temperature T is

a) PT/R b) PRT c) P/RT d) RT/P Answer: c Explanation: PV = nRT (number of moles = n/V) n/V ...

## Maximum deviation from ideal gas is expected from :

a) $N_{2}\left(g\right)$ b) $CH_{4}\left(g\right)$ c) $NH_{3}\left(g\right)$ d) $H_{2}\left(g\right)$ Answer: c Explanation: Higher the critical temperature more easily will ...

## A certain gas takes three times as long to effuse out as helium. Its molecular mass will be

a) 27 u b) 36 u c) 64 u d) 9 u Answer: b Explanation: ...