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Answers
1 (i) 2CaCO3 → 2CaO + CO2
(ii) 2CO + O2 → 2CO2
(iii) 2Ca[NO]3 → 2CaO + 4NO2 + O2
(iv) 2Ca[NO]3 → 2CaO + 4NO2 + O2h
2(i)Thermal decomposition is breaking a compound into two or more elements, or into two new compounds with the help of heat. These reactions are irreversible.
Thermal dissociation is breaking a substance into two or simpler substances with the help of heating. These reactions are reversible
(ii) A reaction between an acid and base which results in the formation of salt and water is a neutralization reaction.
A reaction where a semi-solid insoluble product is formed, which is called precipitate is a precipitation reaction.
(iii) A reaction between an acid and base which results in the formation of salt and water is a neutralization reaction.
A reaction where a semi-solid insoluble product is formed, which is called precipitate is a precipitation reaction.
(iv)Catalyst is a substance which increases or decreases the rate of reaction. There are two types of catalyst, positive & negative. A positive catalyst increases the rate and negative catalyst decreases the rate of reactions.
The promoter is a catalyst to catalyst which increases the efficiency of a catalyst.
(v) An oxide which dissolves in water to form acids is an acidic oxide. It's a non-metal oxide.
An oxide which dissolves in water is an alkali, basic oxides are metallic oxides.