Question

You mix two colourless solutions and the resulting mixture becomes cloudy. What type of reaction was observed?
a)Physical reaction
b)Redox reaction
c)Precipitation reaction
d)Acid base reaction

Answer 1

The process in which one or more substances, the reactants interact with each other chemically and get converted to one or more different substances, the products.The substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants and thus creates different substances as products.

Complete answer:
When favourable conditions are introduced in a system,the chemical species which are a part of that system which are known as reactants tend to react with each other to form completely new species with different chemical properties known as products.As these chemical reactions take the system might also a change in few of its characteristics.For if the reaction is exothermic than heat is evolved into the system’s immediate surrounding,if the reaction is endothermic than heat is absorbed from the system’s immediate surrounding.Sometimes there might even be a colour change.
Let us try out the chemical reaction mentioned above.We first start by taking two colourless solution into two different beakers.We then pour each of the two separate solutions into one common test tube.It is observed that there is there is a cloudy mixture which has formed in the test tube.This type of reaction are precipitation reaction.

Hence the correct option is (c).

Note:
Precipitation reactions are a type of displacement reaction. One of the best examples of precipitation reaction is the reaction in which silver nitrate and potassium chloride react in aqueous solution.This leads to the formation of silver chloride which is a white precipitate in a solid-state and insoluble in water.
$AgN{O_3}_{(aq)} + KC{l_{(aq)}} \to AgC{l_{(precipitate)}} + KN{O_3}_{(aq)}$