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The p-Block Elements
Question
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Bleaching powder loses its bleaching property when kept in an open bottle for a long time. Give reason.

Answer

CaOCl2 +CO2 ----> CaCO3 +Cl2

Chlorine is responsible for the bleaching property.
when bleaching powder bottle kept for a long time it react with CO2 and produce chlorine.
henceloses the property of bleaching.

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Some More Questions From The p-Block Elements Chapter

Why is N2 less reactive at room temperature?

Mention the conditions required to maximise the yield of ammonia.

What is the covalency of nitrogen in N2O5?

Bond angle in PH4+ is higher than that in PH3. Why?

Write a balanced equation for the hydrolytic reactions PCl5 in heavy water.

What is the basicity of H3PO4?

What happens when H3PO3 is heated?