Activity 1.6 Ncert Science class 10

Activity 1.6 Ncert Science class 10

Procedure: The question asks to heat an aqueous solution of lead nitrate into a test tube and see what happens.

Observation: A yellow precipitate of lead oxide form with the evolution of brown nitrogen dioxide gas which has an irritating smell.

Inference: Lead nitrate decomposes to lead oxide which is yellow. Nitrogen dioxide gas is liberated which has a brown colour and irritating smell.

2Pb(NO3)2(s)    ———>  2PbO(s)  + 4NO2(g)  +  O2(g)

Lead nitrate      Heat        Lead oxide   Nitrogen oxide   Oxygen

Next: Decomposition of ferrous sulphate. Activity 1.5.

Read also:

Electrolysis of water. Activity 1.7.

Solved questions and activities of chapter 1 Chemical reactions and equations.

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