NEET Chemical Equilbrium QUIZ AUGUST 10

Chemistry MCQ Test

Chemical Reactions & Chemical Equilibrium

7 Questions • Select the best answer

Q1. All reactions which have chemical disintegration

(1) Is reversible (2) Is reversible and endothermic (3) Is exothermic (4) Is reversible or irreversible and endothermic or exothermic

Q2. 4 g Hydrogen reacts with 9 × 10²³ chlorine molecules and forms HCl gas. If the total pressure of the system after the reaction is 700 mm, what is the partial pressure of HCl?

(1) 300 mm (2) 200 mm (3) 600 mm (4) 350 mm

Q3. The role of catalyst in a chemical reaction is

(1) To help attain equilibrium in a shorter time (2) To lower the activation energy (3) To shift the equilibrium in such a way as to increase the concentration of the product (4) Both (1) and (2)

Q4. Which of the following is at equilibrium?

(1) The boiling of water in an open ice box, temperature of water is constant (2) Freezing of water in an open ice box, temperature of ice is constant (3) Group of ants accept their daily life and population of groups is constant (4) In a balloon, water gas and some drops of water are present. The pressure of the balloon is constant

Q5. The equilibrium constant in a reversible reaction at a given temperature

(1) Depends on initial concentration of the reactants (2) Depends on the concentration of the products at equilibrium (3) Does not depend on the initial concentrations (4) It is not characteristic of the reaction

Q6. Which of the following example shows the effect of catalyst on a reversible reaction?

(1) It gives a new reaction path with low activation energy (2) It shifts equilibrium to the right side (3) It decreases kinetic energy of activated molecules (4) It decreases the rate of backward reaction

Q7. Which of the following statements is/are correct?

(1) Chemical equilibrium does not consider time after equilibrium is established (2) Chemical equilibrium does not show the limit of occurrence of forward and backward reactions (3) Chemical equilibrium does not show the rate of attaining equilibrium by a chemical system (4) All of these

Test Result

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Correct Answers

Q1. (4) Is reversible or irreversible and endothermic or exothermic

Q2. (3) 600 mm

Q3. (4) Both (1) and (2)

Q4. (4) In a balloon, water gas and some drops of water are present. The pressure of the balloon is constant

Q5. (3) Does not depend on the initial concentrations

Q6. (1) It gives a new reaction path with low activation energy

Q7. (3) Chemical equilibrium does not show the rate of attaining equilibrium by a chemical system