(a) What happens when zinc granules are heated with sodium hydroxide solution? Write equation of the reaction which takes place.
(b) What happens when bases react with non-metal oxides? Explain with the help of an example. What does this reaction tell us about the nature of non-metal oxides?

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Solution

(a) When zinc granules are heated with sodium hydroxide (base), sodium zincate salt is formed with the liberation of hydrogen gas.

$Zn (s) + 2 NaOH (a q) \overset{Heat}{\to} {Na}_{2} {ZnO}_{2} (a q) + H_{2} (g)$

(b) Bases react with non-metal oxides to form a salt and water.
Bases + Non-metal oxides Salt + Water

Example:
$2 NaOH (a q) + {CO}_{2} (g) \to {Na}_{2} {CO}_{3} (a q) + H_{2} O (l)$

Here, sodium hydroxide (base) reacts with carbon dioxide (non-metal oxide) to give sodium carbonate (salt) and water.

This reaction shows that non-metal oxides are acidic in nature.

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(a) What happens when zinc granules are heated with sodium hydroxide solution? Write equation of the reaction which takes place. (b) What happens when bases react with non-metal oxides? Explain with the help of an example. What does this reaction tell us about the nature of non-metal oxides?

(a) What happens when zinc granules are heated with sodium hydroxide solution? Write equation of the reaction which takes place.
(b) What happens when bases react with non-metal oxides? Explain with the help of an example. What does this reaction tell us about the nature of non-metal oxides?