set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Scurvy is caused due to the deficiency of vitamin

a) K

b) C

c) B1

d) A

Question : 2

Alkaline hydrolysis of esters is known as

a) dehydration

b) saponification

c) esterification

d) alkalination

Question : 3

By which one among the following mechanisms, soap removes dirt (soil) from cloth?

a) Soap takes away the oily part of the soil and thus separates the soil from the cloth

b) Soap reacts with soil and converts them into soluble silicates

c) Soap dissolves the soil as such

d) The soap molecules bind with the soil, lift the soil and keep it suspended which can then be rinsed away

Question : 4

Washing soap can be prepared by saponification with alkali of which of the following oil

a) Groundnut oil

b) Paraffin oil

c) Rose oil

d) Kerosene oil

Question : 5

Which substance is used to retard the setting action of cement?

a) CaSO₄ , 2H₂O

b) Al₂O₃

c) CaO

d) Na₂O + K₂O

Question : 6

Soft soaps are

a) potassium salt of fatty acids

b) sodium salt of fatty acids

c) sodium and potassium salt

d) potassium salt of sulphonic acids