Question

what happens when a lead nitrate on heating b silver chloride on exposing to sunlight c calcium oxide on mixing with water

Answer 1

Lead nitrate decomposes to PbO + NO2(reddish brown gas with irritating smell) + O2(colourless odourless gas rekindles a burning splinter)

When silver chloride is exposed to sunlight, photolytic decomposition reaction takes place. Ag and Cl2 are products.

calcium oxide on mixing with water, calcium hydroxide (colorless crystal or white powder) produced.

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Answer 2

Here's your answers:

On heating Lead Nitrate it gets decomposed and we get lead oxide, nitrogen dioxide gas and oxygen gas.

2Pb(NO3)2→ 2PbO(s) + 4NO2(g) + O2(g)

Silver chloride on exposing to sunlight gets decomposed into silver and chlorine gas.

2AgCl → 2Ag(s) + Cl2(g)

Clacium oxide on mixing with water gorms calcium hydroxide.

CaO(s) + H2O(l) → Ca(OH)2(aq).