Question

Q1) Write a balanced equation for the following.
a) a white solid prepared from two gases

b) decomposition of silver nitrate

c) Reaction involving the production of of two oxides of sulphur from sulphate

Q2) Write the observation for the following reaction.
a) When ammonium dichromate is heated

b) When a rotten egg smell gas is past over a blue aqueous

solution of copper sulphate

c) Water is added to quicklime

Q3) Name the following.
a) A metal oxide yellow when hot and white when cold

b) A metal carbonate stable to heat

Q4) Define.

a) Thermal dissociation

b) Effervescence​

Answer 1

Answer:

Q4) Differentiate between the following:

Thermal decomposition & thermal dissociation

Neutralization reaction & a precipitation reaction

Electrolytic decomposition & photochemical decomposition

A catalyst & a promoter

An acidic oxide & a basic oxide

Explanation:

Solution:

Thermal decomposition & thermal dissociation 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.

Neutralization reaction & a precipitation reaction 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.

Electrolytic decomposition & photochemical decomposition When a substance decomposes into two elements or two compounds when current/electricity is passed through it, it's an electrolytic decomposition. When a substance decomposes into two elements or two compounds in the presence of light, its an electrolytic decomposition.