Take about 2g lead nitrate powder in a boiling tube. Hold the boiling tube with a pair of tongs and heat it over a flame. What do you observe? why does this happen? Give a brief discription of this activity.

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Solution

Observations:

1. A brown coloured gas is evolved.
2. White coloured lead nitrate is converted into yellow solid.

On heating lead nitrate decomposes to form yellow coloured lead oxide. Brown coloured nitrogen dioxide gas and colourless oxygen gas is evolved.

2Pb(NO₃)₂ $\to$ 2PbO + 2NO₂ + O₂

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Take about 2g lead nitrate powder in a boiling tube. Hold the boiling tube with a pair of tongs and heat it over a flame. What do you observe? why does this happen? Give a brief discription of this activity.

Observations: 1. A brown coloured gas is evolved. 2. White coloured lead nitrate is converted into yellow solid. On heating lead nitrate decomposes to form yellow coloured lead oxide. Brown coloured nitrogen dioxide gas and colourless oxygen gas is evolved. 2Pb(NO3)2 → 2PbO + 2NO2 + O2