Questions and answers for exam Preparation

MCQs

Total Questions : 10

Match List I and List II and select the correct answer by using the codes given below.
List I                                                                                                  List II
A. Exclusion                                                                                 1. Balmer
B. Uncertainty                                                                             2. Heisenberg principle
C. Atomic spectrum of hydrogen atom in visible region     3. Schrodinger
D. Wave mechanics                                                                   4. Pauli

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

Discuss Question

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

Option: (d)

Question 2.

Which of the following statements is/are true?
(a) The process of oxidation leads to a gain of electrons.
(b) The process of oxidation leads to a loss of electrons.
(c) The process of reduction leads to a gain of electrons.
(d) The process of reduction leads to a loss of electrons.

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

Discuss Question

Answer: Option C. -> (b) and (c)
:
C

Option: (c)

Question 3.

Consider the following statements In nuclear power reactors
(a) Uranium-235 is used as the fission material.
(b) Graphite is used as a moderator.
(c) Rods of lead are used to control the rate of nuclear reaction.
Which of the above statements are correct?

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

Discuss Question

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

Option: (b)

Question 4.

Match List I and List II and select the correct
List I (Nature of solution)                 List II (ph)
A. Weakly acidic                                 1. 1.5
B. Strongly acidic                               2. 12.5
C. Weakly basic                                 3. 6.5
D. Strongly basic                               4. 7.5

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

Discuss Question

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

Option: (c)

Question 5.

Match List I and List II and select the correct answer by using the codes given below.
List I                                                 List II
(Substances)                                      (Use)
A. Zeolite                                   1. Purgative
B. Sodium thiosulphate          2. Safety matches
C. Magnesium sulphate          3. Dry cell
D. Graphite                               4. Purification
                                                    5. Photography

3 5 2 4
4 1 2 3
3 2 1 5
4 5 1 3

Discuss Question

Answer: Option D. -> 4 5 1 3
:
D

Option: (d)

Question 6.

The fresh urine has no smell while after some time it develops a strong odor because

the urea of the fresh urine is converted into uric acid
the uric acid of the fresh urine is converted into urea
conversion of urea to ammonia by bacteria
conversion of uric acid to creatinine by bacteria

Discuss Question

Answer: Option C. -> conversion of urea to ammonia by bacteria
:
C

Option: (c)

Question 7.

Match List I and List II and select the correct answer by using the codes given below.
List I                        List II
A. Water gas       1. CH₄
B. Producer gas 2. CO + H₂
C. Coal gas           3. H₂ + CH₄ + CO₂
D. Gobar gas       4. CO + N₂

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

Discuss Question

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

Option: (d)

Question 8.

Match List I and List II and select the correct answer by using the codes given below.
List I (Process)                 List II (Materials Obtained)
A. Hydrogenation     1. Vanaspati
B. Evaporation           2. Ethyl alcohol
C. Distillation             3.Common salt
D. Polymerisation     4.Nylon

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

Discuss Question

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

Option: (a)

Question 9.

Match List I and List II and select the correct answer by using the codes given below.
List I                                    List II
A. Sodium Palmitate   1. Ore
B. Galena                      2. Fertilizer
C. NPK                           3. Soap
D. Cellulose                  4. Natural polymer

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

Discuss Question

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

Option: (b)

Question 10.

Match List I and List II and select the correct answer by using the codes given below.
List I                           List II
A. Smoke       1. Dispersion of gas in liquid
B. Gel             2. Dispersion of solid in solid
C. Emulsion   3. Dispersion of liquid in liquid
D. Foam         4. Dispersion of liquid in solid
                        5. Dispersion of solid in gas