Question

Name the gas which is usually produced when dilute sulphuric acid
reacts with a metal. Illustrate it with an example. How will you test the
evolution of this gas?
While diluting an acid, why is it recommended that acid should be
added to water and not water to the acid?​

Answer 1

Answer:

Hydrogen gas

Explanation:

example

Zn +H2SO4 ->ZnSO4 + H2

SINCE HYDROGEN GAS HAS A HIGH CALORIFIC VALUE , WHEN A MATCHSTICK IS BROUGHT NEAR THE ABOVE REACTION , IT BURNS WITH A POP SOUND

if we add water to the acid , a serious reaction might occur and it may have far reaching consequences and we generally prefer adding acid to water to make it a dilute solution so as to make react with a reactive metal as metal dont react with concentrated acids

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Answer 2

Answer:

The gas which is usually produced when dilute sulphuric acid reacts with a metal is hydrogen.

When this gas is passed through soap solution, soap bubbles are formed containing hydrogen gas and when we bring a burning matchstick near the bubbles, it burns with a pop sound.

While diluting an acid, it is recommended that acid should be added to water slowly with continuous stirring. If we add water to the acid, the mixture may splash out and cause burns because then, exothermic reaction takes place.

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