Questions and answers for exam Preparation

MCQs

Total Questions : 10

Match List I and List II and select the correct
List I                                           List II
A. Diamond                        1. Fertiliser
B. Ammonium Sulphate 2. Oxidising agent
C. Sodium Periodate        3. Dry cells
D. Manganese dioxide    4. Abrasive

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

Discuss Question

Answer: Option B. -> 4 1 2 3
:
B

Option: (b)

Question 2.

When one of the following statements is correct?

Liquid sodium is employed as a coolant in nuclear reactors
Calcium carbonate is an ingredient of tooth paste
Bordeaux mixture consists of sodium sulphate and lime
Zinc amalgams are used as a dental filling

Discuss Question

Answer: Option A. -> Liquid sodium is employed as a coolant in nuclear reactors
:
A

Option: (a)

Question 3.

Match List I (Fuel) with List II (Energy value) and select the correct answer by using the codes given below the lists.
List I                       List II
A. Wood            1. 30 MJ/kg
B. Petrol            2. 56 MJ/kg
C. Natural gas 3. 50 MJ/kg
D. Coal              4. 15 MJ/kg

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

Discuss Question

Answer: Option C. -> 4 3 2 1
:
C

Option: (c)

Question 4.

Which one of the following statements is not correct?

The presence of NaCI increases the rate of setting of plaster of Paris
Gypsum is added to the cement to slow down its rate of setting
All alkaline earth metals form hydrated salts
Barium and strontium are found free in nature

Discuss Question

Answer: Option D. -> Barium and strontium are found free in nature
:
D

Option: (d)

Question 5.

Assertion (A) : In the periodic table of chemical increase from top to bottom in a group
Reason (R) : In a group, the atomic radii generally increase from top to bottom.

Both A and R are individually true and R is the correct explanation of A
Both A and R are individually true but R is not the correct explanation of A
A is true but R is false
A is false but is true

Discuss Question

Answer: Option D. -> A is false but is true
:
D

Option: (d)

Question 6.

Consider the following chemicals
(a) Benzene
(b) Carbon tetrachloride
(c) Sodium carbonate
(d) Trichloroethylene
Which of the above is/are used as dry cleaning chemical?

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

Discuss Question

Answer: Option C. -> (a), (b) and (d) only
:
C

Option: (c)

Question 7.

Match List I and List II and select the correct answer by using the codes given below the lists.
List I                                  List II
A. Natural gas      1. Protein found in the outer layer of the human skin
B. Mustard gas    2. Solid carbon dioxide
C. Keratin             3. Poisonous liquid used in chemical warfare
D. Dry ice             4. A mixture of gases occurring in pockets below the earth's surface

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

Discuss Question

Answer: Option C. -> 4 3 1 2
:
C

Option: (c)

Question 8.

Arrange the following metals in the decreasing order of their relative abundance in earth's crust after aluminium
(a) Calcium
(b) Iron
(c) Sodium
(d) Magnesium

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

Discuss Question

Answer: Option C. -> (b), (a), (c), (d)
:
C

Option: (c)

Question 9.

Regarding the atom of a chemical element, magnetic quantum number refers to

orientation
shape
size
spin

Discuss Question

Answer: Option A. -> orientation
:
A

Option: (a)

Question 10.

Match List I and List II and select the correct answer by using the codes given below.
List I                                        List II
A. Silver bromide          1. Etching of glass
B. Hydrogen peroxide 2. Purification of air
C. Ozone                         3. Bleaching agent
D. Hydrofluoric acid     4. photography