JEE Main 2017 (Online) 8th April Morning Slot | Ionic Equilibrium Question 90 | Chemistry

Additin of sodium hydroxide solution to a weak acid (HA)results in a buffer of pH 6. If ionition constant of HA is 10^$$-$$5, the ratio of salt to acid concentration in the buffer solution will be :

4 : 5

1 : 10

10 : 1

5 : 4

JEE Main 2017 (Offline)

MCQ (Single Correct Answer)

-1

pK_a of a weak acid (HA) and pK_b of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is :

6.9

7.0

1.0

7.2

JEE Main 2013 (Offline)

MCQ (Single Correct Answer)

-1

How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2?

0.1 L

0.9 L

2.0 L

9.0 L

AIEEE 2012

MCQ (Single Correct Answer)

-1

The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionization constant, K_a of this acid is :

3 $$\times$$ 10^–1

1 $$\times$$ 10^–3

1 $$\times$$ 10^–5

1 $$\times$$ 10^–7

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