Simplified ICSE Chemistry Class 9 Solutions by Viraf J Dalal. We covered all the Simplified ICSE Chemistry Class 9 Solutions by Viraf J Dalal in this post for free so that you can practice well for the exam.
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Simplified ICSE Chemistry Class 9 Objective Solutions by Viraf J Dalal for Students
Blood in the human body is highly buffered at pH
(A) 7.4
(B) 7.0
(C) 6.9
(D) 8.1
Option a – 7.4
The pH of the buffer solution is 5. If the pKa of a weak acid is 4. The ratio of acid to salt in the solution is
(A) 1 : 1
(B) 1:10
(C) 10 : 1
(D) 1 : 2
Option b – 1:10
The pH of the buffer solution prepared by adding 10 ml of 0.1 M CH3COOH and 20 ml of 0.1 M sodium acetate will be (pKa of CH3COOH = 4.74)
(A) 4.05
(B) 3.04
(C) 5.04
(D) 3.05
Option c – 5.04
In a mixture of sodium acetate and acetic acid, some amount of water is added, then the pH of the solution
(A) Increases
(B) Decreases
(C) Unchanged
(D) Neutral
Option c – Unchanged
A solution containing an equimolar concentration of CH3COOH and CH3COONa. If the pKa of acetic acid is 4.8. The pH of the solution will be
(A) 4.8
(B) 5.101
(C) 9.2
(D) 5
Option a – 4.8
Which one of the following mixtures will act as an acidic buffer solution?
(A) CH3COOH + CH3COONH4
(B) HCI + NH4Cl
(C) HCOOH + HCOOK
(D) HCI + NaCl
Option c – HCOOH + HCOOK
A solution is 2 M of NH4OH and 2 M NH4Cl for NH4OH pKb = 4.7. The pH of the solution is
(A) 4.7
(B) 9.3
(C) 7
(D) 9
Option b – 9.3
The pH of the mixture of acetic acid and potassium acetate will be
(A) 0
(B) 7
(C) Less than 7
(D) More than 7
Option c – Less than 7
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