set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Tetraethyl Lead (TEL) is added to petrol

a) To increase its anti-knocking rating

b) To prevent it from freezing

c) To increase its flash points

d) To increase its boiling point

Question : 2

Which one of the following is used in the manufacture of soaps?

a) Mobil oil

b) Kerosene oil

c) Vegetable oil

d) Cutting oil

Question : 3

The percentage of nitrogen in urea is

a) 47%

b) 30%

c) 25%

d) 60%

Question : 4

The Pressure gauge is not given in the domestic LPG cylinders because

a) Their use is not safe

b) They are so costly

c) They cannot represent the quantity of gas in LPG cylinders

d) They are choked by LPGs

Question : 5

CNG used in automobiles to check pollution mainly consists of

a) N₂

b) CH₄

c) CO₃

d) H₂

Question : 6

Aspartame is an artificial sweetner sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low calorie sweetening agent in food items. What is the basis of this use?

a) When aspartame is used in food processing, the sweet taste remains, but it becomes resistant to oxidation

b) Aspartame is as sweet as sugar but after ingestion into the body, it is converted into metabolites that yield no calories

c) Aspartame is as sweet as table sugar, but unlike table sugar, it is not readily oxidized in the human body due to lack of requisite enzymes

d) Aspartame is several times sweeter than table sugar, hence food items made with small quantities of aspartame yield fewer calories on oxidation