Chemistry – Class 11 Mock Test 5

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Question 1 of 10

1. Which of the following relation is true between Gibbs energy, enthalpy, temperature, and entropy?

G = H -TS

G = H -S

G = -TS

G = H -T

Question 1 of 10

Question 2 of 10

2. If the chemical reaction is: aA + bB → cC + dD and K is the equilibrium constant. Then what is the equilibrium constant of the reaction naA + nbB → ncC + ndD?

K/n

Kⁿ

Question 2 of 10

Question 3 of 10

3. The units of K_P and K_C are equal.

true

false

Question 3 of 10

Question 4 of 10

4. What is a change in energy if 18 grams of water is heated from room temperature to 20 degrees above it?

0.506 KJ

1.50 KJ

1.06 KJ

1.506 KJ

Question 4 of 10

Question 5 of 10

5. The enthalpy of 435 KJ per Mol is obtained from the conversion of hydrogen molecule into two hydrogen atoms.

False

True

Question 5 of 10

Question 6 of 10

6. ΔS(universe) > 0 can also be written as _________

ΔS(system) + ΔS(surroundings) > 0

ΔS(system)

ΔS(surroundings) > 0

ΔS(system) - ΔS(surroundings) > 0

Question 6 of 10

Question 7 of 10

7. Spontaneous reactions that occur or mostly ________in nature.

both endothermic and exothermic

exothermic

endothermic

neither exothermic nor endothermic

Question 7 of 10

Question 8 of 10

8. All the enthalpies of fusion are positive.

false

true

Question 8 of 10

Question 9 of 10

9. If the value of Gibbs free energy for a reaction is 20J/mol, the reaction is ___________

nonspontaneous

spontaneous

may not be spontaneous

may be spontaneous

Question 9 of 10

Question 10 of 10

10. Write pressure in terms of concentration and temperature.

P = nrt

P = CRT

C = PT

p = CT

Question 10 of 10