What is the nature of the oxides formed by s block elements?

Acidic

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Basic

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Both acidic and basic

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Neutral

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Solution

The correct option is B
Basic

The s block elements are mostly metals. The metals form oxides which are basic in nature. This means when the oxides of metals are made to react with water, they form bases. For example, sodium is an s-block element. It reacts with oxygen to form sodium oxide. The reaction takes place as follows:

$4 N a (s) + O_{2} (g) \to 2 N a_{2} O (s)$

Sodium oxide reacts with water to form sodium hydroxide which is basic in nature. The reaction takes place as follows:

$2 N a_{2} O (s) + 2 H_{2} O (l) \to 4 N a O H (a q)$

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Question 10

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