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Q.

Sodium hydroxide gives hydrogen gas and [[1]] when it reacts with zinc metal.

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answer is SODIUM ZINCATE.

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Detailed Solution

Sodium hydroxide is a base and zinc is metal. When an alkali (base) reacts with a  metal, it produces salt and hydrogen gas. That is why sodium hydroxide gives hydrogen gas and sodium zincate when it reacts with the zinc metal.

Sodium Hydroxide + Zinc → Sodium zincate + Hydrogen


 

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