Question

1. A solution of substance “X” is used for whitewashing. identify “X” and write its formula

2. a)What do you observe when Lead Nitrate is heated?
b) write a balanced chemical equation for the above reaction.
c) identify the type of reaction
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Answer 1

Answer:

1.calcium oxide CaO

2.2Pb(No3)2------2Pbo+4No2+o2

a yellow oxide Pbo is formed and a reddish brown gas NO2 is produced

the type of reaction is DECOMPOSITION REACTION