12th Chemistry 2nd Volume Book. We covered all the 12th Chemistry 2nd Volume Book in this post for free so that you can practice well for the exam.
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12th Chemistry 2nd Volume Objective Book for Students
When 25 ml of 0.02 M NH4OH and 25 ml of 0.2 M NH4Cl are mixed to form a buffer solution. The pH of the solution is (pKb = 4.8 for NH4OH)
(A) 5.8
(B) 8.2
(C) 3.8
(D) 4.8
Option b – 8.2
Which of the following aq. the solution is acidic in nature?
(A) NaCl
(B) NaHCO3
(C) CuCl₂
(D) KCI
Option c – CuCl₂
The pKa value of the strongest carboxylic acid is
(A) 4.19
(B) 3.41
(C) 4.76
(D) 0.23
Option d – 0.23
the pH of 0.01 M H₂SO4 solution is
(A) 2
(B) 1.6990
(C) 0.2
(D) 2.6990
Option b – 1.6990
100 ml of 1 M HCl mixed with 200 ml of 0.5 MI NaOH solution. The pH of the resulting mixture is
(A) >7
(B) <7
(C) = 0
(D) =7
Option d – =7
the pH of a strong acid is 2. If 100 ml of strong acid is mixed with 900 ml of water. The resulting solution will have a pH
(A) 10
(B) 1
(C) 0.4
(D) 3
Option d – 3
A solution is 1 M sodium acetate and 10 Macetic acid. If pKa is 4.6. The pH of the solution is
(A) 0.46
(B) 3.6
(C) 4.6
(D) 5.6
Option b – 3.6
A solution containing 2 M each of NH4OH and NH4Cl. If pKa for NH4OH is 4.7. The pH of a solution is
(A) 4.7
(B) 9.3
(C) 7
(D) 9
Option b – 9.3
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