Question

give one examples each of displacement, dicomposion &combination reaction with explaination

Answer 1

Combination Reaction:-

In this type of reaction two or more substances combine to form a single product.

Example:-

i)Burning Of Coal

C + O2 --------- CO2

ii)Reaction between CaO and H2O

CaO + H2O ---------- Ca(OH)2

Calcium Oxide reacts vigorously with water to produce slake lime(Calcium Hydroxide) releasing a large amount of heat.

Decomposition Reaction:-

Those reactions in which a single substance in presence of heat,light or electricity decomposes to give two or more products.

Example:-

i)Decomposition of lead nitrate by heating

Pb(NO3)2 ----------- PbO + NO2 + O2

ii) Electrolytic dissociation of water

H2O(in presence of electricity)------H2+O2

Displacement Reaction :-

Those chemical reactions in which a more reactive metal displaces a less reactive metal from its salt solution is known as Displacement Reaction.

Examples:-

i) Fe + CuSO4 ---------- FeSO4 + Cu

ii) Pb + CuCl2 ----------- PbCl2 + Cu