Question

Find the odd one out.
i) 2Mg(s) + O2(g) → 2MgO
ii) 2Cu(s) + O2(g) → 2CuO
iii) MgH2 → Mg + H2
iv) H2 + Cl2 → 2HCl​

Answer 1

Answer:

iii) MgH2 --> Mg + H2 is the odd one out.m

Explanation:

Reaction 1 , 2 qnd 4 are all synthesis/combination reactions.

Reaction number 3 is a decomposition reaction

Answer 2

Reaction 3 is odd one .

all except this are Synthesis while it is Decomposition Reaction

Answer 3

Reaction 3 is odd one .

all except this are Synthesis while it is Decomposition Reaction