Thermodynamics Test

Result

Thermodynamics Test - 33

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Weekly Quiz Competition

Question 1
4 / -1

A
+ 250 kJ

B
- 250 kJ

C
+ 125 kJ

D
- 125 kJ
Question 2
4 / -1

The decreasing order of bond dissociation energies of C—C, C—H and H—H bonds is

A

B

C

D
Question 3
4 / -1

A
∆E + 2RT

B
∆E - 2RT

C
∆E + RT

D
∆E - RT

Solution
Question 4
4 / -1

A monoatomic ideal gas undergoes a process in which the ratio of P to V at any instant is constant and equals to 1. What is the molar heat capacity of the gas?

A

B

C

D
0
Question 5
4 / -1

A
the dissociation energy of H₂ and enthalpy of sublimation of carbon

B
latent heat of vaporisation of methane

C
the first four ionisation energies of carbon and electron gain enthalpy of hydrogen

D
the dissociation energy of hydrogen molecule, H₂
Question 6
4 / -1

The standard molar heat of formation of ethane, CO₂ and water (l) are - 21.1, - 94.1 and - 68.3 kcal, respectively. The standard molar heat of combustion of ethane will be

A
-372 kcal

B
162 kcal

C
-240 kcal

D
183.5 kcal
Question 7
4 / -1

Heat of neutralisation will be minimum for which of the following combination ?

A
NaOH + H₂ SO₄

B
NH₄ OH + CH₃ COOH

C
NaOH + HCl

D
NaOH + CH₃ COOH
Question 8
4 / -1

When 50 cm³ of 0.2 N H₂ SO₄ is mixed with 50 cm³ of 1 N KOH, the heat liberated is

A
11.46 kJ

B
157.3 kJ

C
573 kJ

D
573 J
Question 9
4 / -1

In which of the following reactions, the heat liberated is known as "heat of combustion" ?

A
H⁺ (aq) + OH ^- (aq) → H₂ O ( l ) + heat

B

C
CH₄ (g) + 2O₂ (g) → CO₂(g) + 2H₂O ( l ) + heat

D
H₂ SO₄ (aq) + H₂O ( l ) → H₂ SO₄ (aq) + heat
Question 10
4 / -1

For the following two reactions,
(i) CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O ; ∆H = - 890.4 kJ
(ii) 2HgO(s) → 2Hg( l ) + O₂ (g); ∆H = + 181.6 kJ
Which one of the following statements is correct ?

A
Both of them are exothermic

B
Both of them are endothermic

C
(i) is exothermic and (ii) is endothermic

D
(i) is endothermic and (ii) is exothermic