Dalton's law of partial pressure is applicable to which one of the following systems?

• NH₃ + HCl

• NO + O₂

• H₂ + Cl₂

• CO + H₂

122.

A gas deviates from ideal behaviour at a high pressure because its molecules

• attract one another

• show the Tyndall effect

• have kinetic energy

• are bound by covalent bonds

In order to increase the volume of a gas by 10%, the pressure of the gas should be

• increased by 10%

• increased by 1%

• decreased by 10%

• decreased by 1%

The rms velocity of molecules of a gas of density 4 kg m^-3 and pressure 1.2 × 10⁵ Nm^-2 is

• 300 ms^-1

• 900 ms^-1

• 120 ms^-1

• 600 ms^-1

0.5 mole of each of H₂, SO₂ and CH₄ are kept in a container. A hole was made in the container. After 3 h, the order of partial pressures in the container will be

• pSO₂ > pH₂ > pCH₄

• pSO₂ > pCH₄ > pH₂

• pH₂ > pSO₂ > pCH₄ 

• pH₂ > pCH₄ >  pSO₂ 

5 moles of SO₂ and 5 moles of O₂ are allowed to react. At equilibrium, it was found that 60% of SO₂ is used up. If the partial pressure of the equilibrium mixture is one atmosphere, the partial pressure of O₂ is 

• 0.82 atm

• 0.52 atm

• 0.21 atm

• 0.41 atm

For one mole of an ideal gas, increasing the temperature from 10°C to 20°C

• increases the average kinetic energy by two times

• increases the rms velocity by √2 times

• increases the rms velocityby two times

• increases both the average kinetic energy and rms velocity, but not significantly

Out of the given two compounds, the vapour pressure of B at a particular temperature is

• higher than that of A

• lower than that of A

• higher or lower than A depending on the size of the vessel

• same as that of A

25 g of each of the following gasses are taken at 27°C and 600 mm pressure. Which of these will have the least volume?

• HCl

• HBr

• HI

• HF

In which one of the following, does the given amount of chlorine exert the least pressure in a vessel of capacity 1 dm³ at 273 K?

• 0.0355g

• 0.071g

• 6.023 × 10²¹ molecules

• 0.02 mol