GK
ELEMENTS COMPOUNDS SUBSTANCES METALS AND NON METALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Oxygen
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Nitrogen
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Hydrogen
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Carbon dioxide
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Detailed explanation-1: -Hydrogen gas is produced when metals reacts with acids.
Detailed explanation-2: -Metals react with acid to give hydrogen gas and form metal salts.
Detailed explanation-3: -Hydrogen gas is produced as the metal reacts with the acid. A salt solution is also formed. The products of this reaction are a salt solution and hydrogen gas.
Detailed explanation-4: -Metals react with dilute Hydrochloric acid to produce salt and Hydrogen gas.
Detailed explanation-5: -Hydrogen gas is not evolved when there is a reaction between metal and Nitric acid occurs as Nitric acid is a strong oxidizing agent. The Hydrogen gas produced during the reaction with metal gets oxidized to H 2 O, hence no hydrogen gas is produced. Instead, it evolves nitric oxides such as etc.