Chemical Thermodynamics MCQs for NEET — Chemistry Questions with Answers

Which is not a spontaneous process?

All the naturally occurring processes, i.e., spontaneous proceed spontaneously in a direction which leads to:

In which case entropy decreases?

For exothermic reaction to be spontaneous ($∆\mathrm{S}$=negative)

'The free energy change due to a reaction is zero when

An ideal gas expands at a constant external pressure of 2.0 atmosphere by 20 litre and absorbs 10kJ of heat from surrounding. What is the change in internal energy of the system:-

The temperature of an ideal gas expansion increases in an:-

36 ml of pure water takes 100 sec to evaporate from a vessel and heater connected to an electric source which delivers 806 watt. The $∆{\mathrm{H}}_{\mathrm{vaporisation}}$ of H₂O is:-

5 moles of an ideal gas expands isothermally and irreversibly from a pressure of 10 atm to 1 atm against a constant external pressure of 1 atm. find the W_irr at 300 K:-

In the reaction at 300 K

H₂(g) + Cl₂(g)$\to$2HCl(g)       $∆\mathrm{H}°$= -185 kJ

if 2 mol of H₂ completely react with 2 mole of Cl₂ to form HCl. What is $∆\mathrm{U}°$ for this reaction:-