Choose the correct option:
$(d)$ Elements which show unique nature in the preparation of hydrogen are

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Solution

Zinc, lead and aluminium are considered to have unique nature because all of these can show amphoteric nature by reacting with acids and hot alkali to form soluble salts and hydrogen.

Hence, option $C$ is correct.

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Standard VIII Chemistry

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Choose the correct option: (d) Elements which show unique nature in the preparation of hydrogen are

Zinc, lead and aluminium are considered to have unique nature because all of these can show amphoteric nature by reacting with acids and hot alkali to form soluble salts and hydrogen. Hence, option C is correct.

Choose the correct option:
$(d)$ Elements which show unique nature in the preparation of hydrogen are

Zinc, lead and aluminium are considered to have unique nature because all of these can show amphoteric nature by reacting with acids and hot alkali to form soluble salts and hydrogen.

Hence, option $C$ is correct.