MCQs

Q591: NH3 can be a base according to ______?

• A) Arrhenius theory
• B) Bronsted-Lowery theory
• C) Both b and c

Q592: Which of the following is not an Arrhenius acid?

• A) HCl
• B) CO2
• C) HNO3

Q593: Preservatives are used to preserve _______?

• A) Acids
• B) Bases
• C) Food

Q594: The value of Kc increases when ______?

• A) [Product] is less
• B) [Product] is more
• C) [Reactant] is more

Q595: Qc can be defined as _____?

• A) Ratio of product and reactants
• B) Ratio of molar concentration of product and reactant at specific time
• C) Ratio of molar concentration of product and reactant raised to the power of coefficient

Q596: The system is stable in equilibrium when ______?

• A) Qc = Kc
• B) Qc > Kc
• C) Qc < K

Q597: For which system does the equilibrium constant, Kc has units of concentration.

• A) N2(g) + 3H2(g) ⇌ 2NH3(g)
• B) N2(g) + 02(g) ⇌ 2NO
• C) H2(g) +12(g) ⇌ 2HI(g)

Q598: When the magnitude of Kc is small, indicates ______?

• A) Reaction mixture contain most of the reactant
• B) Reaction mixture contain most of the product
• C) Reaction goes to completion

Q599: A reaction which is never goes to completion is known as reversible reaction. Reversible reaction is represented by ______?

• A) Doted lines
• B) Single arrow
• C) Double arrow

Q600: Which one of the following statements is false about dynamic equilibrium?

• A) It takes place in a close container
• B) Concentration of reactant and products are not changed
• C) Equilibrium cannot be disturbed by any external stress