Question

Which of the following is not a salt?
A.Sodium Chloride
B.Slaked Lime
C.Lead Sulphide
D.Zinc Nitrate

Answer 1

Firstly we should have the basic idea of salts. Then we will look at each of the options one by one. We will look into them in detail and then decide which option to choose. The common name of the salts should also be in mind while solving such questions.

Complete Step by step answer: Step1. Salt is a chemical compound which consists of both cations and anions. They are generally formed with the acid base reactions. They are neutral in nature. They are highly soluble in the water. They are insulators when in solid form but they are great conductors when they are in aqueous form.
Step2. It is the chemical composition of table salt. This type of salt is often used in our blood. It is mixed with iodine to provide the body with the sodium and iodine. Sodium helps in nerve impulses and muscle contractions. While dehydrated it is used to prevent excessive sweating.
Step3.
Lead Sulphide is an inorganic chemical compound whose formula is $PbS$ . It is the semiconductor material. It is formed when the lead ion is reacted with hydrogen Sulphide. It is also an inorganic salt. It is one of the main ore of the lead often found naturally.
Step4.
Zinc Nitrate is also an inorganic salt whose chemical composition is $Zn{\left( {N{O_3}} \right)_2}$ . It is soluble in both water and alcohol. It is prepared by dissolving zinc in nitric acid. It has no big uses but it is used for synthesis of coordination polymers.
Step5.
Slaked lime is also an inorganic base. Its chemical composition is $Ca{\left( {OH} \right)_2}$ . It forms when the quicklime is mixed with water. It is a basic solution so it is not salt.
Step6. We have looked at all the given options and we come at a conclusion that slaked lime is not a salt.

Hence option B is the correct answer.

Note: The slaked lime or as we say the calcium hydroxide is used in the water and sewage treatment. I remove the smaller particles from water, providing us with the clean product. It is a very low cost method of water treatment.