Chemical Equilibrium Test

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Chemical Equilibrium Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

In the equilibrium PCl₅ ⇌ PCl₃ + Cl₂ + 22 kcal, the dissociation of PCl₅ will be more on

A
increasing pressure

B
decreasing temperature

C
increasing temperature

D
increasing the concentration of chlorine

Solution

Since the reaction proceeds with the release of energy, forward reaction is favoured by the decrease in temperature.
Question 2
1 / -0

In which of the following cases is rate of reaction not affected by pressure?

A
PCl₃ (g) + Cl₂ (g) ⇌ PCl₅ (g)

B
N₂ (g) + 3H₂ (g) ⇌ 2NH₃ (g)

C
N₂ (g) + O₂ (g) ⇌ 2NO (g)

D
2SO₂ (g) + O₂ (g) ⇌ 2SO2 (g)

Solution

Since the number of moles of reactants and products are the same, there will not be any effect of pressure on the reaction.
Question 3
1 / -0

Which of the following has negative value for Δ ng?

A
H₂ (g) + I₂ (g) ⇄ 2HI (g)

B
PCl₅ (g) ⇄ PCl₃ (g) + Cl₂ (g)

C
3H₂ (g) + N₂ (g) ⇄ 2NH₃ (g)

D
2 H₂O (g) + 2Cl₂ (g) ⇄ 4HCl (g) + O₂(g)

Solution

Since the number of moles of products is less than the number of moles of reactants, so the value of Δ ng is negative.
Question 4
1 / -0

For a reversible reaction, if the concentration of the reactants is doubled, then the equilibrium constant will

A
also be doubled

B
be halved

C
become one-fourth

D
remain the same

Solution

Equilibrium constant is independent of the concentration of reactants and products.

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Chemical Equilibrium Test - 7

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Chemical Equilibrium Test - 7

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Question 1

increasing pressure

decreasing temperature

increasing temperature

increasing the concentration of chlorine

Solution

Question 2

PCl3 (g) + Cl2 (g) ⇌ PCl5 (g)

N2 (g) + 3H2 (g) ⇌ 2NH3 (g)

N2 (g) + O2 (g) ⇌ 2NO (g)

2SO2 (g) + O2 (g) ⇌ 2SO2 (g)

Solution

Question 3

H2 (g) + I2 (g) ⇄ 2HI (g)

PCl5 (g) ⇄ PCl3 (g) + Cl2 (g)

3H2 (g) + N2 (g) ⇄ 2NH3 (g)

2 H2O (g) + 2Cl2 (g) ⇄ 4HCl (g) + O2 (g)

Solution

Question 4

also be doubled

be halved

become one-fourth

remain the same

Solution

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PCl₃ (g) + Cl₂ (g) ⇌ PCl₅ (g)

N₂ (g) + 3H₂ (g) ⇌ 2NH₃ (g)

N₂ (g) + O₂ (g) ⇌ 2NO (g)

2SO₂ (g) + O₂ (g) ⇌ 2SO2 (g)

H₂ (g) + I₂ (g) ⇄ 2HI (g)

PCl₅ (g) ⇄ PCl₃ (g) + Cl₂ (g)

3H₂ (g) + N₂ (g) ⇄ 2NH₃ (g)

2 H₂O (g) + 2Cl₂ (g) ⇄ 4HCl (g) + O₂(g)