Giving an example list two information which make a chemical equation more useful

Question: Giving an example list two information which make a chemical equation more useful (informative) CBSE Class 10 Paper Solution, Board Paper

Question: Giving an example list two information which make a chemical equation more useful (informative).

Answer: 

(i) Physical state of reactants must be mentioned, e.g.

2H (g) + O₂(g) → 2H₂0 (l)

(ii) Condition in which reaction takes place are written on the arrow head, e.g. 

2H₂ (g) + O (g) (burning) → 2H0 (l)

Consider the following chemical reaction

X + Barium chloride → Y + Sodium chloride

(White ppt)

(a) Identify ‘X’ and ‘Y’

(b) The type of reaction

(a) ‘X’ is Na₂SO₄ and Y is BaSO.

(b) The type of reaction

Na₂SO₄ + BaCl₂ → BaSO + 2NaCl (White ppt)

The reaction is precipitation reaction. It is also called double displacement reaction.


Question: Giving an example list two information which make a chemical equation more useful (informative)