Question

State one characteristic each of the chemical reaction which takes place when
Zn + H2S04 - ZnSO4 + H2
Ca(OH)2 + CO2 CaCO3 + H2O
2 Pb(NO3)2 - 2Pb0 + 4NO2 +02
CH4 +202 - CO2 + 2H2O
2H2 + O2- 2H2O​

Answer 1

Answer:

1)zinc displaces hydrogen thereby it's a displacement reaction

zinc being above hydrogen in the activity series it have the capability to displace hydrogen from its solution

2)calcium carbonate (lime water) co2 turns like water milky

3)colourless lead nitrate becomes yellow lead oxide and reddish brown nitrogen dioxide

there is change of colour taking place In this reaction

5)two non metals react thereby it's a covalent bond.

the volume of oxygen becomes twice during the reaction