Question

pls solve this soon who will solve all the three i will mark them as brain list ​

Answer 1

Answer:

II

11) Brown coloured fumes are obtained when lead nitrate is heated, Brown fumes are of Nitrogen dioxide.

the balanced chemical equation :

• 2Pb(NO3)2 -- 2PbO + 4NO2 +O2

type of reaction is decomposition reaction

(Only one question to be asked)

Answer 2

11.when lead nitrate is heated, it decomposes into lead oxide.

Answer:

2Pb(No3)2 (solid)-----》2PbO ( solid) +4No2+ O2

it is thermal decomposition reaction

12 double displacement rxn or double replacement rxn in when on reaction the cation and anion switch their places and hence form a new substance.

BaCl2 (aq) +Na2So4 (aq)----》BaSo4(s) +2NaCl

barium sodium barium sodium

chloride sulphate sulphate chloride

(white ppt)

13. Acc. to ohms law electric current is propotional to voltage and inversely propotional to tesistance i.e.

V=IR

HOPE IT HELPS.. IF STILL ANY DOUBT FEEL FREE TO ASK.

THANX