A salt X is dissolved in water having $p H = 7$ . The resulting solution has a $p H$ more than $7.$ The salt is made by neutralisation of

A strong acid and strong base

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A strong acid and strong weak base

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A weak acid and weak base

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A weak acid and strong base

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Solution

The correct option is D A weak acid and strong base
A weak acid and strong base salt produce weak acid - strong base on dissociation, so its $p H$ will be more than $7.$
A weak base and strong acid salt produce weak base - strong acid on dissociation, so its $p H$ will be less than $7.$
Strong acid and a strong base solution will always be neutral, so its $p H$ will be $7.$

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Similar questions

Question 05.
Sodium carbonate is a basic salt because it is a salt of
(a) strong acid and strong base
(b) weak acid and weak base
(c) strong acid and weak base
(d) weak acid and strong base

Q. Choose the correct from the following:
(i) Salt of a strong acid and a strong base are neutral with pH value of 7.
(ii) Salt of a strong acid and a weak base are basic with pH value more than 7.
(iii) SaIt of a weak acid and a strong base are acidic with pH value less than 7.

Q. Assertion :The

p H

N H_{4} C l

solution in water is less than

7

and pH of

C H_{3} C C O O N a

solution is more than

7

. Reason:

N H_{4} C l

is a salt of weak base

N H_{4} O H

and strong acid

H C l

whereas

C H_{3} C O O N a

is a salt of a weak acid

C H_{3} C O O H

and strong base

N a O H

Q. An example of salt of weak acid and weak base and an ezample for salt of strong acid and strong base

p H

of a salt of strong base with weak acid

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A salt X is dissolved in water having pH=7. The resulting solution has a pH more than 7. The salt is made by neutralisation of

A salt X is dissolved in water having $p H = 7$ . The resulting solution has a $p H$ more than $7.$ The salt is made by neutralisation of