Questions and answers for exam Preparation

MCQs

Total Questions : 137 | Page 3 of 14 pages

Question 21. Match List I with List II and select the correct answer by using the codes given below.
List I                                       List II
A. Nitrolime                      1. Rocket fuel
B. Sodium thiosulphate 2. Refrigerant
C. Liquid ammonia          3. Photography
D. Hydrazine                    4. Fertilizer

3 4 1 2
3 2 4 1
4 1 2 3
4 3 2 1

Discuss Question

Answer: Option D. -> 4 3 2 1
:
D
Option:(d)

Question 22. Match List I and List II and select the correct answer by using the codes given below
List I                                                                            List II
A. Best conductor of heat and electricity          1. Gold
B. Most abundant metal                                       2. Lead
C. Most malleable metal                                       3. Aluminium
D. Poorest conductor of heat                               4. Silver

1 3 2 4
2 3 4 1
3 2 4 1
4 3 1 2

Discuss Question

Answer: Option D. -> 4 3 1 2
:
D
Option:(d)

Question 23. Which of the following statements about 'dry ice' are correct?
(a) It is a useful refrigerant.
(b) On heating, it turns into a liquid.
(c) It has acidic properties
(d) It causes burns when pressed against the skin.

(a) and (c)
(a), (b) and (c)
(b) and (d)
(a), (c) and (d)

Discuss Question

Answer: Option D. -> (a), (c) and (d)
:
D
Option:(d)

Question 24. Match List I with List II and select the correct
List I                                               List II
A. Hydrogen    1. The most abundant element on the earth
B. Oxygen         2. The most abundant element in the universe
C. Nitrogen       3. Constituent of plant and animal proteins
                           4. Used as a bleaching agent

1 2 4
3 2 1
2 1 3
4 1 2

Discuss Question

Answer: Option C. -> 2 1 3
:
C
Option:(c)

Question 25. Match List I with List II and select the correct answer by using the codes given below.
List I                               List II
A. Pyrolysis          1. Takes place in the absence of oxygen
B. Gasification     2. Transfer of solid fuel to gaseous energy carrier
C. Biomass           3. Direct transfer of solid organic waste to liquid fuel
D. Combustion    4. Takes place in the presence of oxygen

1 2 3 4
2 3 4 1
1 3 2 4
3 2 1 4

Discuss Question

Answer: Option D. -> 3 2 1 4
:
D
Option:(d)

Question 26. Consider the following statements
Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to
(a) act as the reducing agent
(b) remove silica associated with the iron ore
(c) function as fuel, to supply heat
(d) act as an oxidizing agent Of these statements

(a) and (b) are correct
(b) and (d) are correct
(a) and (c) are correct
(c) and (d) are correct

Discuss Question

Answer: Option C. -> (a) and (c) are correct
:
C
Option:(c)

Question 27. Consider the following statements
(a) Liquified natural gas (LNG) is liquified under extremely cold temperatures and high pressure to facilitate storage or transportation in specially designed vessels.
(b) First LNG terminal in India was built in Hassan.
(c) Natural gas liquids (NGL) are separated from LPG and these include ethane, propane, butane and natural gasoline.
Which of the statements given above is/are correct?

(a) only
(a) and (c)
(b) and (c)
(a), (b) and (c)

Discuss Question

Answer: Option B. -> (a) and (c)
:
B
Option:(b)

Question 28. Assertion (A) : The main constituent of the liquified petroleum gas is methane.
Reason (R): Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.
Codes