Question

Name the characteristics of the chemical reaction highlighted in the following :

Answer 1

Answer:

Heya ,

Here is your answer ---->

Explanation:

A> FORMATION OF PRECIPITATE

Pb(NO3)2 (aq) + 2KI (aq) ----------> PbI2 (s ) + 2 KNO3 (aq)

It represents the formation of precipitate that is Lead Iodide ( PbI2 ). Hence , it is a precipitation reaction, in which lead nitrate and potassium iodide in their aqueous form reacts to form a precipitation, like substance.

B> CHANGE IN COLOR

In second reaction, clearly citric acid ( purple in Color ) reacts with potassium permanganate to form a colourless solution.

C> EVOLUTION OF GAS

Sodium reacts with water to form Sodium hydroxide with evolution of hydrogen gas.

D> EXOTHERMIC REACTION ( EVOLUTION OF HEAT)

Calcium oxide reacts with water to form calcium hydroxide with a lot of heat . The reactions in which heat is evolved are called exothermic reactions. Hence,this reaction represents an exothermic reaction.

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