Question

c) Mention the type of reactions.
(combination, decomposition, displacement)
i) 2HgO 2Hg + O2
ii) 2CO + O2 - 2002
iii) CuO + H2 – Cu + H2O​

Answer 1

Explanation:

I) 2HgO → 2Hg + O2

----------Decomposition reaction------------

II) 2CO + O2 → 2CO2

------------Combination reaction--------------

III) CuO + H2 → Cu + H2O

------------Displacement reaction------------

If you are facing problems in determining the type of reaction then you should use a trick-:

Combination reaction - A + B → AB

Decomposition reaction- AB → A + B

Displacement reaction - AX + B → BX + A

Double Displacement reaction- AX + BY → AY + BX.

In this way you will not get confused in this type of questions..