MDCAT Past Papers - UHS - Chemistry - Chap No 6 Quiz

Attempt 10 MCQs on MDCAT Past Papers - UHS - Chemistry - Chap No 6 | Quiz 1

1. For an equilibrium reaction: 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) The forward reaction is exothermic, increase in temperature shifts the equilibrium position toward left because:

The concentrations of SO₂ and O₂ decrease and concentration of SO₃ increases as the temperature increases
The concentration of SO₂ and O₂ increases and concentration of SO₃ decreases as the temperature increases
The concentrations of SO₂ and O₂ increase and concentrations of SO₃ stays same as the temperature increases
The concentrations of SO₂, SO₃ and O₂ increase as the temperature increases

2. What is the ultimate fate of reversible reaction?

Completion of reaction
Complete consumption of products
Complete consumption of reactants
A state when there is no net concentration change

3. In reversible reaction, when product is removed, the equilibrium shifts towards the:

Reactant side
Product side
Both side one by one
No effect

4. Formation of NH₃ is a reversible and exothermic process. What will happen on cooling?

More reactant will form
More H₂ will form
More N₂ will form
More Product NH₃ will form

5. The value of equilibrium constant (Kc) for the reaction 2HF ⇌ H₂ + F₂ is 10⁻¹³ at 2000°C. Calculate the value of Kp for this reaction:

2 × 10⁻¹³
10⁻¹³
186 × 10⁻¹³
3.48 × 10⁻⁹

6. The catalyst used for the manufacture of H₂SO₄ by the contact process is:

SO₂
V₂O₅
Fe₂O₃
Pt/Pd

7. One can estimate the direction in which equilibrium will shift with the help of:

Le Chatelier's Principle
Law of Mass Action
Hess's Law
Present in any amount

8. The principle that states that if a stress is applied to a system at equilibrium, the system nullifies the effect of stress is:

Haber's
Le-Chatelier's
Boyle's
Charles'

9. Identify the CORRECT option required for maximum yield of ammonia by Haber's process:

High pressure, low temperature, continual removal of NH₃
Low pressure, low temperature, continual removal of NH₃
High pressure, high temperature, continual removal of NH₃
High pressure, low temperature, continual addition of NH₃

10. Consider the equilibrium: BiCl₃ + H₂O ⇌ BiOCl + 2HCl Addition of which chemical will turn the cloudy solution clear?

BiCl₃
H₂O
BiOCl
HCl

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