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Question

Which of the following methods is adopted for preparing dilute solution of H2SO4?

A
Addition of conc.H2SO4 to water
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B
Addition of water to conc.H2SO4
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C
Dissolution of SO3 in excess water
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D
Dissolution of SO3 in excess H2SO4
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Solution

The correct option is A Addition of conc.H2SO4 to water
The right method to make concentrated acid dilute is to mix acid in water. If we mix water in concentrated acid, it may cause an explosion as the reaction is exothermic.
So, for preparing dilute solution of H2SO4 we proceed by adding Conc. H2SO4 to water.

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