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Valency

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Question

From the formula of water H₂O, work out the valencies of hydrogen and oxygen.

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Solution

Molecular formula, H₂O

Symbol of elements H O

Valency of elements 1 2

Thus, the valency of hydrogen, H is 1 and the valency of oxygen, O is 2.

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Similar questions

Q. Chlorine gas removes hydrogen from water

H_{2} O

giving out oxygen gas.

Q. Name the elements water is made of. What are the valencies of these elements ? Work out the chemical formula for water.

Q. If the valency of hydrogen is 1 and that of nitrogen is 3, work out the formula for ammonia.

Q. Assertion :Molecular formula of water is

(H_{2} O)

. Reason: One molecule of water contains two atoms of hydrogen and one atom of oxygen.

Q. Chlorine gas removes hydrogen from water

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; oxygen gas is liberated.

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