#### 11th Standard Chemistry Thermodynamics English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021

11th Standard

Reg.No. :
•
•
•
•
•
•

Chemistry

Time : 00:20:00 Hrs
Total Marks : 20

Answer all the questions

20 x 1 = 20
1. 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

2. Heat of combustion is always

(a)

positive

(b)

negative

(c)

zero

(d)

either positive or negative

3. 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

4. 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

5. 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 Cp=$\frac{5}{2}$R]

(a)

- 250 R

(b)

- 500 R

(c)

500 R

(d)

+ 250 R

6. 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

7. ΔS is expected to be maximum for the reaction

(a)

Ca(S)+ 1/2O2(g) ⟶ CaO(S)

(b)

C(S)+ O2(g) ⟶ CO2(g)

(c)

N2(g) + O2(g) ⟶ 2NO(g)

(d)

CaCO3(S) ⟶ CaO(S) + CO2(g)

8. A fundamental goal of thermodynamics is the prediction of ------ of the process.

(a)

reversibility

(b)

rate

(c)

spontaneity

(d)

none of these

9. --------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

10. Which among the following is not an extensive property?

(a)

Volume

(b)

internal energy

(c)

Mass

(d)

temperature

11. For an isothermal process.

(a)

q = 0

(b)

dV = 0

(c)

dT = 0

(d)

dP = 0

12. Which among the following is not a state function?

(a)

Pressure

(b)

Volume

(c)

Temperature

(d)

Work

13. Which among the following is a state function?

(a)

Pressure

(b)

Enthalpy

(c)

Heat

(d)

Both (a) and (b)

14. The gravitational work done by an object is -------

(a)

Qv

(b)

fx

(c)

PV

(d)

mgh

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

(a)

∆U=qV

(b)

∆U=w

(c)

∆U= q + w

(d)

∆U=0

16. 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

17. -----is an intensive property

(a)

internal energy

(b)

volume

(c)

temperature

(d)

mass

18. SI unit of molar heat capacity is------

(a)

J mol-1

(b)

KJ mol-1

(c)

JK-1 mol-1

(d)

JK-1

19. Heat absorbed at constant volume is measured in ------- calorimeter.

(a)

Coffee cup

(b)

Differential scanning

(c)

Bomb

(d)

Adiabatic

20. 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