The equation that represents general van't Hoff equation is 

• $\mathrm{\pi }= \frac{\mathrm{n}}{\mathrm{V}}\mathrm{RT}$

• $\mathrm{\pi }= \mathrm{nRT}$

• $\mathrm{\pi }= \frac{\mathrm{V}}{\mathrm{n}}\mathrm{RT}$

• $\mathrm{\pi }= \mathrm{nVRT}$

5.0 g of sodium hydroxide (molar mass 40 g mol^-1) is dissolved in little quantity of water and the solution is diluted upto 100 ml. What is the molarity of the resulting solution?

• 0.1 mol dm^-3

• 1.0 mol dm^-3

• 0.125 mol dm^-3

• 1.25 dm^-3

Which among the following solid is a non-polar solid?

• Hydrogen chloride

• Sulphur dioxide

• Water

• Carbon dioxide

Mathematical equation of first law of thermodynamics for isochoric process is

• ΔU = q_v

• -ΔU = q_v

• q= -W

• ΔU = W

The criterion for a spontaneous process is

• ΔG >0 

• ΔG < 0

• ΔG = 0

• ΔS_total < 0

Identify an extensive property amongst the following.

• Viscosity

• Heat capacity

• Density

• Surface tension

What is the amount of work done when 0.5 mole of methane, CH₄(g), is subjected to combustion at 300 K? (Given, R=8.314JK^-1 mol^-1)

• -2494 J

• -4988 J

• + 4988 J

• + 2494 J

If 'n' represents total number of asymmetric carbon atoms in a compound then the possible number of optical isomers of the compound is 

• 2n

• 2ⁿ

• n²

• 2n+2

9.

Which is the most stable allotrope of sulphur?

• Octahedral sulphur

• Monoclinic sulphur

• Plastic sulphur

• Colloidal sulphur

The compound which is not formed when a mixture of n-butyl bromide and ethyl bromide treated with sodium metal in the presence of dry ether is

• butane

• octane

• hexane

• ethane