Question

A. Tick the correct option.
1. Decomposition reaction is the reverse of
a) combination reaction
b) oxidation reaction
c) combustion reaction
d) none of these
2. While writing a chemical equation
a) symbol and formula of product is written first
b) symbol and formula of reactant is written first
c) an arrow (--) is placed first
d) a double headed arrow() is written first
3. Burning of carbon in oxygen is an example of
a) decomposition reaction
b) electrolysis
c) displacement reaction
d) combination reaction
4. Among the following reactions, which one is a decomposition reaction?
2MgO
a) 2Mg + O2
b) H + Cl2
2HCI
c) C+02
CO2
d) CaCO, CaO + CO,​

Answer 1

Answer:

1. (c) 2. (d) 3. (c) 4. (b)

Answer 2

Answer:

1.a 2.b 3 b 4.d tqq very much

Explanation:

tqq