(a) Explain, with example, how the physical states of the reactants and products can be shown in a chemical equation.
(b) Balance the following equation and add state symbols:
Zn + HCl ------> ZnCl₂ + H₂
(c) Convey the following information in the form of a balanced chemical equation:
An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution.""

Academic Chemistry NCERT Class 10

(a) The physical states of the reactants and products are shown by putting the state symbols in an equation.

For example: $Zn\ ( s) \ +\ H_{2} SO_{4} \ ( aq) \ \rightarrow \ ZnSO_{4} \ ( aq) \ +\ H_{2} \ ( g) +Heat$

(b) The balanced equation is given below:

$Zn\ ( s) \ +\ 2HCl\ ( aq) \ \rightarrow \ ZnCl_{2} \ ( aq) \ +\ H_{2} \ ( g)$

(c) An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in the solution.

$FeSO_{4}( aq) \ +\ 2NaOH\ ( aq) \ \rightarrow \ Fe( OH)_{2} \ ( s) \ +\ Na_{2} SO_{4} \ ( aq)$

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Updated on: 10-Oct-2022

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