Question

how is a base prepared from metals?give example.​

Answer 1

Answer:

Reaction of Base with Metals:

When alkali (base) reacts with metal, it produces salt and hydrogen gas. Example: Sodium hydroxide gives hydrogen gas and sodium zincate when reacts with zinc metal. Sodium aluminate and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal.

Potassium hydroxide (KOH)

Sodium hydroxide (NaOH)

Barium hydroxide (Ba(OH)2)

Caesium hydroxide (CsOH)

Strontium hydroxide (Sr(OH)2)

Calcium hydroxide (Ca(OH)2)

Lithium hydroxide (LiOH)

Rubidium hydroxide (RbOH

Answer 2

By the action of water or steam on some active metals Some active metals like sodium and potassium react with cold water to form hydroxides with the evolution of hydrogen gas. ... By heating carbonates of some metals When calcium carbonate is heated, calcium oxide and carbon dioxide are formed.

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