Question

(A)A student took 23 g of a substance X in a glass beaker and poured water
over it slowly. He observed bubbles along with hissing noise. The
beaker becomes quite hot. Identify X and write the equation for the
chemical reaction taking place. What type of reaction is it?

(B)Give an example of endothermic reaction taking place in nature. ​

Answer 1

Answer:

X=CaO and Y=Ca(OH)2

it is exothermic reaction

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Answer 2

Explanation:

(A) The substance x is Quick lime or calcium oxide. The chemical equation for this:

CaO(s) + H20(l) = Ca(OH) 2

(B) Example of endothermic reaction takes place in nature is melting of ice.