Question

Q.25. Different metals show different reactivity towards oxygen. Metals like sodium and potassiu
react so vigorously that they catch fire when kept in open. Metal oxides are in general basic i
nature. But there are some oxides which show both acidic and basic properties.
(1) How are reactive metals like sodium stored safely to prevent their loss.
(ii) Write the reaction of a basic metal oxide with HCl. Give the chemical equation.
(iii) Name an amphoteric oxide.
(iv) Write the reaction of Al2O3 with sodium hydroxide with the help of a chemical equation.
(v) What will be obtained when we dissolve Na2O in water?​

Answer 1

Answer:

1) They are stored in kerosene oil to prevent from coming in contact with air as they catch fire..

2) Reaction with a basic metal oxide -:

HCl + NaOH --- NaCl + H2 ( hydrogen gas)

3)Al2O3 (alluminium oxide) an example of amphoteric oxide..

4) Al2O3 + NaOH ---NaAlO2+ H2O

5) Na2O + H2O --- NaOH.

Explanation:

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