All the naturally occurring processes proceed spontaneously in a direction which leads to _______________

(a)

decrease in entropy

(b)

increase in enthalpy

(c)

increase in free energy

(d)

decrease in free energy

Heat of combustion is always ____________

(a)

positive

(b)

negative

(c)

zero

(d)

either positive or negative

C(diamond) ) ⟶ C(graphite), ΔH = -ve, this indicates that ___________

(a)

graphite is more stable than diamond

(b)

graphite has more energy than diamond

(c)

both are equally stable

(d)

stability cannot be predicted

Change in internal energy, when 4 kJ of work is done on the system and 1 kJ of heat is given out by the system is ______________

(a)

+1 kJ

(b)

- 5 kJ

(c)

+3 kJ

(d)

- 3 kJ

The value of ΔH for cooling 2 moles of an ideal monatomic gas from 125° C to 25° C at constant pressure will be [given C_p = \(\frac{5}{2}\)R] ____________.

(a)

- 250 R

(b)

- 500 R

(c)

500 R

(d)

+ 250 R

The correct thermodynamic conditions for the spontaneous reaction at all temperature is ______________

(a)

ΔH < 0 and ΔS > 0

(b)

ΔH < 0 and ΔS < 0

(c)

ΔH > 0 and ΔS = 0

(d)

ΔH > 0 and ΔS > 0

ΔS is expected to be maximum for the reaction ____________

(a)

Ca_(S)+ 1/2O_2(g) ⟶ CaO_(S)

(b)

C_(S) + O_2(g) ⟶ CO_2(g)

(c)

N_2(g) + O_2(g) ⟶ 2NO_(g)

(d)

CaCO_3(S) ⟶ CaO_(S) + CO_2(g)

A fundamental goal of thermodynamics is the prediction of __________ of the process.

(a)

reversibility

(b)

rate

(c)

spontaneity

(d)

none of these

________ is an example for closed system.

(a)

Solution ofCuSO₄ in a beaker

(b)

A gas contained in a cylinder fitted with piston

(c)

Hot water contained in a thermos flask

(d)

Tea in a cup

Which among the following is not an extensive property?

(a)

Volume

(b)

internal energy

(c)

Mass

(d)

temperature

For an isothermal process _____

(a)

q = 0

(b)

dV = 0

(c)

dT = 0

(d)

dP = 0

Which among the following is not a state function?

(a)

Pressure

(b)

Volume

(c)

Temperature

(d)

Work

Which among the following is a state function?

(a)

Pressure

(b)

Enthalpy

(c)

Heat

(d)

Both (a) and (b)

The gravitational work done by an object is __________

(a)

Qv

(b)

fx

(c)

PV

(d)

mgh

For a cyclic process involving isothermal expansion of an ideal gas.

(a)

∆U=qV

(b)

∆U=w

(c)

∆U= q + w

(d)

∆U=0

Pick out the true statement(s).
(i) q and ware path functions
(ii) q + w is a state function

(a)

Only (i)

(b)

Only (ii)

(c)

Both (i) and (ii)

(d)

Both are incorrect statements

_________ is an intensive property

(a)

internal energy

(b)

volume

(c)

temperature

(d)

mass

SI unit of molar heat capacity is ___________

(a)

J mol^-1

(b)

KJ mol^-1

(c)

JK^-1 mol^-1

(d)

JK^-1

Heat absorbed at constant volume is measured in ____________ calorimeter.

(a)

Coffee cup

(b)

Differential scanning

(c)

Bomb

(d)

Adiabatic

The heat of neutralisation of strong acid and strong base is __________

(a)

+57.32 KJ

(b)

+75.32 KJ

(c)

-75.32 KJ

(d)

-57.32 KJ