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Question

Read the statements and select the option that correctly identifies them as true (T)/false (F).
1. Gold and silver do not react with water.
2. Metals produce oxygen when they react with acid as well as base.
3. Phosphorus readily reacts with oxygen to give phosphorus pentoxide, which turns moist blue litmus red.
4. Metal oxides are basic in nature.

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Solution

Metals usually react with water and acids but not bases.
On reaction with water and acid, metals produce hydrogen gas.
Gold and silver are noble metals.
Noble metals are the metals that are unaffected by oxygen, water, acid as well as base.
Non metal reacts with oxygen to form non metal oxides.
Phosphorus is a non-metal which on being exposed to air reacts vigorously with the oxygen present in the air, catches fire and starts burning explosively.
Phosphorus reacts with oxygen to produce phosphorus pentoxide, an acidic oxide, which turns moist blue litmus red.
Metals oxides are generally basic in nature. So, the correct answer is option A.

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