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Chemistry MCQs Quiz For Entry Test
1. The sum of pH and pOH is:
14 (Answer)
18
10
7
2. The pH of 0.001M NaOH aqueous solution is:
9
8
13
11 (Answer)
3. A chemical reaction A →B is said to be in equilibrium when:
Conversion of A to B is 50% complete.
Complete conversion of A to B has taken place
Rate of transformation of A to B is equal to B to A. (Answer)
50% reactant has been changed to B.
4. A basic buffer solution can be prepared by mixing:
Weak base and its salt with strong acid. (Answer)
Strong acid and its salt with weak base.
Strong base and its salt with weak acid.
Weak acid and its salt with strong base.
5. What happens when a reaction is at equilibrium and more reactant is added:
Forward reaction rate is increased (Answer)
Equilibrium remains unchanged
Forward reaction rate is decreased
Backward reaction rate is increased
6. The rate of reaction:
Increases as reaction proceeds
May decrease or increase as reaction proceeds
Decrease as reaction proceeds (Answer)
Remains same as reaction proceeds
7. pH of pure water is:
14
0
9
7 (Answer)
8. The pH value of 0.001M HCl solution is water is:
Nearly 7
>7
<7 (Answer)
Exactly 7
9. Buffer capacity is maximum when both components have:
High concentration
High and equal concentration (Answer)
Equal concentration
Low concentration
10. Acids and bases when dissolved in water:
May be completely dissociated
None of above
May or may not be completely dissociated (Answer)
May not be completely dissociated
11. The rate of a chemical reaction is directly proportional to product of molar concentration of reacting substance. It is called:
Law of mass action (Answer)
Rate law
Active mass rule
Law of conservation of energy
12. Conjugate base of a very weak acid is:
Relatively very weak base
Relatively strong base
Relatively weak base
Relatively very strong base (Answer)
13. The process in which ionization of an electrolyte is suppressed by the addition of another strong electrolyte containing one same ion is called:
Hydrolysis
Pyrolysis
Common ion effect (Answer)
Electrolysis
14. Human blood has a pH of:
6.35
9.35
7.35 (Answer)
8.35
15. A reaction is reversible because:
Products are stable
Reactants are reactive
Products are reactive (Answer)
Reactants are stable
