Question

what is reaction of metals,? ​

Answer 1

Answer:

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Base: Base is bitter in taste and feels soapy on touch. A base turns red litmus paper blue.

Sodium hydroxide (caustic soda), calcium hydroxide, sodium carbonate (washing soda), lime (Calcium oxide), potassium hydroxide (caustic potash), etc. are examples of base.

Types of base:

Base can be divided in two types – Water soluble and water insoluble.

The ionic salt of alkali and alkaline earth metals are soluble in water. These are also known as alkali. For example – sodium hydroxide, magnesium hydroxide, calcium hydroxide, etc. Alkali is considered as strong base.

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Then answer is that..

Reaction of Base with Metals:

When alkali (base) reacts with metal, it produces salt and hydrogen gas.

☞ Alkali + Metal ⇨ Salt + Hydrogen

Example: Sodium hydroxide gives hydrogen gas and sodium zincate when reacts with zinc metal.

☞ 2NaOH + Zn ⇨ Na2ZnO2+ H2

Sodium aluminate and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal.

☞ 2NaOH + 2Al + 2H2O ⇨ 2NaAlO2+ 2H2.

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Hope it helps you dear!