(a) Give one example of a chemical reaction.

(b) State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules.

(c) Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.

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Solution

(a)

The chemical reaction between zinc and dilute sulphuric acid is characterized by the evolution of hydrogen gas.

(b)

When Dilute sulphuric acid is poured over zinc granules, we can see the following characteristics:
1. Rise in temperature: Reaction of zinc with diluted Sulphuric acid is exothermic.
2.Evolution of gas: Hydrogen gas is evolved when zinc reacts with Sulphuric acid.

(c)

Chemical Reaction

$2 K I + P b (N O_{3})_{2} ⟶ 2 K N O_{3} + P b I_{2}$

The following are the two characteristics in this chemical Reaction

1. Double displacement reaction takes place between the compounds.

2. A Yellow colour precipitate is formed due to the formation of Lead Iodide

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Similar questions

state 2 characters of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules

(a) State the various characteristics of chemical reactions.

(b) State one characteristic each of the chemical reaction which takes place when :
(i) dilute hydrochloric acid is added to sodium carbonate

(ii) lemon juice is added gradually to potassium permanganate solution

(iii) dilute sulphuric acid is added to barium chlorid solution

(iv) quicklime is treated with water

(v) wax is burned in the form of a candle

H_{2} S O_{4}

H N O_{3}

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