Question

A substance X, which is an oxide of an element of atomic number 20, is used intensively in the cement industry. This element is present in bones also. On treatment with water it forms a solution which turns red litmus blue.
Identify X and also write the chemical reactions involved.

Answer 1

Answer:

X---calcium oxide

element 20 calcium

Explanation:

treat with water to forms calcium hydroxide

which turns red litmus to blue

to shows it's alkali nature

Answer 2

CaO (Calcium oxide)” is extensively used in ‘cement industry’, bones also contain calcium. Amount of calcium in the bone determine the strength of the bone calcium and water together forms calcium hydroxide which is alkaline and converts red litmus paper blue.

the

element is calcium and the substance X is Calcium Oxide.

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