MCQs on Chemical Equilibrium
1. Find the pH of a solution when 0.01 M HCl and 0.1 M NaOH are mixed in equal volumes
(a) 12.65
(b) 1.04
(c) 7.0
(d) 2.0
Answer:::: (a)
2. Which of the following aqueous solution will be the best conductor of electricity?
(a) NH3
(b) CH3COOH
(c) HCl
(d) C6H12O6
Answer:::: (c)
3. In 0.10 M aqueous solution of pyridine (C5H5N), find the percentage of pyridine that forms pyridinium ion (C5H5N+H) (Kb for C5H5N = 1.7 x 10-9 )
(a) 1.6%
(b) 0.77%
(c) 0.0060%
(d) 0.013%
Answer:::: (d)
5. Highest pH will be recorded for which of the following solutions if they are equimolar
(a) AlCl3
(b) BaCl2
(c) BeCl2
(d) LiCl
Answer:::: (b)
7. What will be the pH of a buffer solution having an equal concentration of B– and HB (Kb = 10-10 for B–)
(a) 7
(b) 4
(c) 10
(d) 6
Answer:::: (b)
8. Find the increase in equilibrium concentration of Fe3+ ions if OH– ions concentration decreases to 1/4th in the following reaction
https://cdn1.byjus.com/wp-content/uploads/2020/01/this-is-the-rendered-form-of-the-equation-you-can16.gif
(a) 8 times
(b) 16 times
(c) 4 times
(d) 64 times
Answer:::: (d)
9. On increasing the concentration of reactants in a reversible reaction, then equilibrium constant will
(a) depend on the concentration
(b) increase
(c) unchanged
(d) decrease
Answer:::: (c)
10. Find the conjugate acid of NH2–
(a) NH3
(b) NH4OH
(c) NH4+
(d) NH2–
Answer:::: (a)
