Question

When a white colour powder is heated in test tube, brown furns are observed. Identify the salt and write the chemical reaction involved

Answer 1

Question:

When a white colour powder is heated in test tube, brown furns are observed. Identify the salt and write the chemical reaction involved?

Answer:

◆ When a white colour powder is heated in test tube.

Equation: 2Pb(NO3)2 --heat-- 2PbO + 4NO3 + O2.

◆ It is Thermal Decomposition Reaction.

◆ THERMAL DECOMPOSITION REACTION: The reaction in which decomposition reaction carried by heat is called thermal decomposition reaction.

◆ In these above reaction

● The colourless salt of lead will be : Leadnitrate-Pb(NO3)2

● On heating lead nitrate forms lead oxide and brown coloured nitrogen dioxide gas (NO2).

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