JEE Chemistry Chemistry In Everyday Life MCQs Set 20

Answer: (c) Syphilis

Explanation:
1. Salvarsan, an organic arsenic compound, was the first synthetic drug (Ehrlich) used against the syphilis bacterium.
2. Arsenic drugs are therefore used for syphilis.

Teacher's Note:
1. S
2. a
3. l
4. v
5. a
6. r
7. s
8. a
9. n
10.
11. (
12. a
13. r
14. s
15. p
16. h
17. e
18. n
19. a
20. m
21. i
22. n
23. e
24. )
25.
26. i
27. s
28.
29. t
30. h
31. e
32.
33. c
34. l
35. a
36. s
37. s
38. i
39. c
40.
41. a
42. r
43. s
44. e
45. n
46. i
47. c
48. a
49. l
50.
51. c
52. h
53. e
54. m
55. o
56. t
57. h
58. e
59. r
60. a
61. p
62. e
63. u
64. t
65. i
66. c
67.
68. a
69. g
70. e
71. n
72. t
73. .
74.
75. I
76. t
77.
78. w
79. a
80. s
81.
82. r
83. e
84. p
85. l
86. a
87. c
88. e
89. d
90.
91. l
92. a
93. t
94. e
95. r
96.
97. b
98. y
99.
100. p
101. e
102. n
103. i
104. c
105. i
106. l
107. l
108. i
109. n
110. .

Answer: (b) Procaine

Explanation:
1. Procaine blocks nerve conduction locally and is a local anaesthetic.
2. Diazepam is a tranquilliser, while chloramphenicol and penicillin-G are antibiotics.

Teacher's Note:
1. P
2. r
3. o
4. c
5. a
6. i
7. n
8. e
9.
10. a
11. n
12. d
13.
14. b
15. e
16. n
17. z
18. o
19. c
20. a
21. i
22. n
23. e
24.
25. a
26. r
27. e
28.
29. l
30. o
31. c
32. a
33. l
34.
35. a
36. n
37. a
38. e
39. s
40. t
41. h
42. e
43. t
44. i
45. c
46. s
47. .
48.
49. C
50. o
51. c
52. a
53. i
54. n
55. e
56.
57. w
58. a
59. s
60.
61. t
62. h
63. e
64.
65. f
66. i
67. r
68. s
69. t
70. ,
71.
72. b
73. u
74. t
75.
76. i
77. t
78.
79. i
80. s
81.
82. a
83. d
84. d
85. i
86. c
87. t
88. i
89. v
90. e
91. .

Answer: (c) Mifepristone

Explanation:
1. Mifepristone is an anti-progesterone used with a prostaglandin as an emergency contraceptive.
2. Norethindrone and ethynylestradiol are used in regular oral contraceptive pills, and bithional is an antiseptic.

Teacher's Note:
1. E
2. m
3. e
4. r
5. g
6. e
7. n
8. c
9. y
10.
11. c
12. o
13. n
14. t
15. r
16. a
17. c
18. e
19. p
20. t
21. i
22. v
23. e
24. s
25.
26. a
27. r
28. e
29.
30. t
31. a
32. k
33. e
34. n
35.
36. a
37. f
38. t
39. e
40. r
41.
42. u
43. n
44. p
45. r
46. o
47. t
48. e
49. c
50. t
51. e
52. d
53.
54. i
55. n
56. t
57. e
58. r
59. c
60. o
61. u
62. r
63. s
64. e
65. .
66.
67. R
68. e
69. g
70. u
71. l
72. a
73. r
74.
75. b
76. i
77. r
78. t
79. h
80.
81. c
82. o
83. n
84. t
85. r
86. o
87. l
88.
89. p
90. i
91. l
92. l
93. s
94.
95. a
96. r
97. e
98.
99. t
100. a
101. k
102. e
103. n
104.
105. d
106. a
107. i
108. l
109. y
110. .

Answer: (d) Ozone layer does not permit infrared radiation from the sun to reach the earth

Explanation:
1. CFCs release chlorine atoms that destroy stratospheric ozone, so (a) is correct.
2. Greenhouse gases cause global warming and acid rain is caused by oxides of sulphur and nitrogen, so (b) and (c) are correct.
3. The ozone layer absorbs harmful ultraviolet radiation, not infrared, so (d) is wrong.

Teacher's Note:
1. O
2. z
3. o
4. n
5. e
6.
7. s
8. h
9. i
10. e
11. l
12. d
13. s
14.
15. u
16. s
17.
18. f
19. r
20. o
21. m
22.
23. u
24. l
25. t
26. r
27. a
28. v
29. i
30. o
31. l
32. e
33. t
34.
35. r
36. a
37. y
38. s
39. .
40.
41. I
42. n
43. f
44. r
45. a
46. r
47. e
48. d
49.
50. r
51. a
52. d
53. i
54. a
55. t
56. i
57. o
58. n
59.
60. p
61. a
62. s
63. s
64. e
65. s
66.
67. t
68. h
69. r
70. o
71. u
72. g
73. h
74.
75. a
76. n
77. d
78.
79. i
80. s
81.
82. t
83. r
84. a
85. p
86. p
87. e
88. d
89.
90. b
91. y
92.
93. g
94. r
95. e
96. e
97. n
98. h
99. o
100. u
101. s
102. e
103.
104. g
105. a
106. s
107. e
108. s
109. .

Answer: (d) barbituric acid derivatives

Explanation:
1. Barbiturates such as veronal and luminal are hypnotics that depress the central nervous system.
2. Paracetamol is an analgesic, chloroquine an antimalarial and bithional an antiseptic.

Teacher's Note:
1. B
2. a
3. r
4. b
5. i
6. t
7. u
8. r
9. i
10. c
11.
12. a
13. c
14. i
15. d
16.
17. d
18. e
19. r
20. i
21. v
22. a
23. t
24. i
25. v
26. e
27. s
28.
29. a
30. r
31. e
32.
33. s
34. e
35. d
36. a
37. t
38. i
39. v
40. e
41. s
42.
43. a
44. n
45. d
46.
47. h
48. y
49. p
50. n
51. o
52. t
53. i
54. c
55. s
56. .
57.
58. T
59. h
60. e
61. y
62.
63. a
64. r
65. e
66.
67. h
68. a
69. b
70. i
71. t
72. -
73. f
74. o
75. r
76. m
77. i
78. n
79. g
80.
81. a
82. n
83. d
84.
85. u
86. s
87. e
88. d
89.
90. o
91. n
92. l
93. y
94.
95. o
96. n
97.
98. p
99. r
100. e
101. s
102. c
103. r
104. i
105. p
106. t
107. i
108. o
109. n
110. .

Answer: (c) syphilis

Explanation:
1. Organic arsenic compounds such as salvarsan kill the syphilis bacterium.
2. They are not used for jaundice, typhoid or cholera.

Teacher's Note:
1. T
2. h
3. i
4. s
5.
6. i
7. s
8.
9. a
10.
11. s
12. t
13. a
14. n
15. d
16. a
17. r
18. d
19.
20. f
21. a
22. c
23. t
24. :
25.
26. a
27. r
28. s
29. e
30. n
31. i
32. c
33. a
34. l
35. s
36.
37. a
38. r
39. e
40.
41. f
42. o
43. r
44.
45. s
46. y
47. p
48. h
49. i
50. l
51. i
52. s
53. .
54.
55. A
56. n
57. t
58. i
59. b
60. i
61. o
62. t
63. i
64. c
65. s
66.
67. h
68. a
69. v
70. e
71.
72. s
73. i
74. n
75. c
76. e
77.
78. r
79. e
80. p
81. l
82. a
83. c
84. e
85. d
86.
87. t
88. h
89. e
90. m
91. .

Answer: (d) chloramphenicol

Explanation:
1. A broad spectrum antibiotic acts against many Gram-positive and Gram-negative bacteria.
2. Chloramphenicol is such an antibiotic. Penicillin is mainly narrow spectrum, while paracetamol and aspirin are analgesics.

Teacher's Note:
1. C
2. h
3. l
4. o
5. r
6. a
7. m
8. p
9. h
10. e
11. n
12. i
13. c
14. o
15. l
16. ,
17.
18. t
19. e
20. t
21. r
22. a
23. c
24. y
25. c
26. l
27. i
28. n
29. e
30.
31. a
32. n
33. d
34.
35. o
36. f
37. l
38. o
39. x
40. a
41. c
42. i
43. n
44.
45. a
46. r
47. e
48.
49. b
50. r
51. o
52. a
53. d
54.
55. s
56. p
57. e
58. c
59. t
60. r
61. u
62. m
63.
64. a
65. n
66. t
67. i
68. b
69. i
70. o
71. t
72. i
73. c
74. s
75. .
76.
77. P
78. e
79. n
80. i
81. c
82. i
83. l
84. l
85. i
86. n
87.
88. G
89.
90. h
91. a
92. s
93.
94. a
95.
96. n
97. a
98. r
99. r
100. o
101. w
102.
103. r
104. a
105. n
106. g
107. e
108. .

Answer: (a) Insulin

Explanation:
1. Insulin lowers blood sugar and is used to treat diabetes.
2. Penicillin is an antibiotic, chloroquine an antimalarial and aspirin an analgesic.

Teacher's Note:
1. I
2. n
3. s
4. u
5. l
6. i
7. n
8.
9. i
10. s
11.
12. a
13.
14. h
15. o
16. r
17. m
18. o
19. n
20. e
21. ,
22.
23. a
24. n
25. d
26.
27. t
28. o
29. l
30. b
31. u
32. t
33. a
34. m
35. i
36. d
37. e
38.
39. i
40. s
41.
42. a
43. n
44.
45. o
46. r
47. a
48. l
49.
50. a
51. n
52. t
53. i
54. d
55. i
56. a
57. b
58. e
59. t
60. i
61. c
62.
63. d
64. r
65. u
66. g
67. .
68.
69. R
70. e
71. m
72. e
73. m
74. b
75. e
76. r
77.
78. t
79. h
80. e
81. m
82.
83. t
84. o
85. g
86. e
87. t
88. h
89. e
90. r
91. .

Answer: (a) Phenelzine

Explanation:
1. Aluminium hydroxide neutralises stomach acid, while ranitidine and cimetidine reduce acid secretion.
2. Phenelzine is an antidepressant (tranquilliser), so it is not an antacid.

Teacher's Note:
1. A
2. n
3. t
4. a
5. c
6. i
7. d
8. s
9.
10. a
11. n
12. d
13.
14. a
15. n
16. t
17. i
18. h
19. i
20. s
21. t
22. a
23. m
24. i
25. n
26. e
27. s
28.
29. l
30. i
31. k
32. e
33.
34. c
35. i
36. m
37. e
38. t
39. i
40. d
41. i
42. n
43. e
44.
45. a
46. n
47. d
48.
49. r
50. a
51. n
52. i
53. t
54. i
55. d
56. i
57. n
58. e
59.
60. c
61. o
62. n
63. t
64. r
65. o
66. l
67.
68. a
69. c
70. i
71. d
72. i
73. t
74. y
75. .
76.
77. P
78. h
79. e
80. n
81. e
82. l
83. z
84. i
85. n
86. e
87.
88. a
89. n
90. d
91.
92. i
93. p
94. r
95. o
96. n
97. i
98. a
99. z
100. i
101. d
102.
103. a
104. r
105. e
106.
107. a
108. n
109. t
110. i
111. d
112. e
113. p
114. r
115. e
116. s
117. s
118. a
119. n
120. t
121. s
122. .

Answer: (b) Both A and R are true, but R is not the correct explanation of A.

Explanation:
1. Enzymes work best at an optimum pH and lose activity when pH changes, so the assertion is true.
2. Change in pH can alter the charge on the protein and so its solubility, so the reason is also accepted as true.
3. The loss of activity is mainly due to the change in shape of the active site, so the solubility statement is not the correct explanation.

Teacher's Note:
1. E
2. a
3. c
4. h
5.
6. e
7. n
8. z
9. y
10. m
11. e
12.
13. h
14. a
15. s
16.
17. a
18. n
19.
20. o
21. p
22. t
23. i
24. m
25. u
26. m
27.
28. p
29. H
30. .
31.
32. L
33. a
34. r
35. g
36. e
37.
38. p
39. H
40.
41. c
42. h
43. a
44. n
45. g
46. e
47. s
48.
49. d
50. e
51. n
52. a
53. t
54. u
55. r
56. e
57.
58. t
59. h
60. e
61.
62. e
63. n
64. z
65. y
66. m
67. e
68.
69. b
70. y
71.
72. a
73. l
74. t
75. e
76. r
77. i
78. n
79. g
80.
81. i
82. t
83. s
84.
85. t
86. h
87. r
88. e
89. e
90. -
91. d
92. i
93. m
94. e
95. n
96. s
97. i
98. o
99. n
100. a
101. l
102.
103. s
104. h
105. a
106. p
107. e
108. .

Answer: (c) A is true, but R is false.

Explanation:
1. Penicillin is produced by Penicillium and kills bacteria, so the assertion is true.
2. Drugs that reduce anxiety by acting on the central nervous system are tranquillisers, not antibiotics, so the reason is false.

Teacher's Note:
1. A
2. n
3. t
4. i
5. b
6. i
7. o
8. t
9. i
10. c
11. s
12.
13. k
14. i
15. l
16. l
17.
18. o
19. r
20.
21. s
22. t
23. o
24. p
25.
26. t
27. h
28. e
29.
30. g
31. r
32. o
33. w
34. t
35. h
36.
37. o
38. f
39.
40. m
41. i
42. c
43. r
44. o
45. o
46. r
47. g
48. a
49. n
50. i
51. s
52. m
53. s
54. .
55.
56. T
57. r
58. a
59. n
60. q
61. u
62. i
63. l
64. l
65. i
66. s
67. e
68. r
69. s
70.
71. s
72. u
73. c
74. h
75.
76. a
77. s
78.
79. e
80. q
81. u
82. a
83. n
84. i
85. l
86.
87. a
88. n
89. d
90.
91. d
92. i
93. a
94. z
95. e
96. p
97. a
98. m
99.
100. a
101. c
102. t
103.
104. o
105. n
106.
107. t
108. h
109. e
110.
111. n
112. e
113. r
114. v
115. o
116. u
117. s
118.
119. s
120. y
121. s
122. t
123. e
124. m
125. .

Answer: (a) Both A and R are true, and R is the correct explanation of A.

Explanation:
1. BHA retards the oxidation of fats, so butter does not turn rancid quickly.
2. The assertion is true, the reason is true and it explains why storage life increases.

Teacher's Note:
1. A
2. n
3. t
4. i
5. o
6. x
7. i
8. d
9. a
10. n
11. t
12. s
13.
14. s
15. u
16. c
17. h
18.
19. a
20. s
21.
22. B
23. H
24. A
25.
26. a
27. n
28. d
29.
30. B
31. H
32. T
33.
34. a
35. r
36. e
37.
38. f
39. o
40. o
41. d
42.
43. p
44. r
45. e
46. s
47. e
48. r
49. v
50. a
51. t
52. i
53. v
54. e
55. s
56. .
57.
58. T
59. h
60. e
61. y
62.
63. a
64. r
65. e
66.
67. a
68. d
69. d
70. e
71. d
72.
73. i
74. n
75.
76. v
77. e
78. r
79. y
80.
81. s
82. m
83. a
84. l
85. l
86.
87. q
88. u
89. a
90. n
91. t
92. i
93. t
94. i
95. e
96. s
97. .

Answer: (a) Both A and R are true, and R is the correct explanation of A.

Explanation:
1. Tetracycline acts against many bacteria and some large viruses and rickettsiae such as the typhus agent, so it is a broad spectrum antibiotic.
2. Both statements are true and the reason explains the assertion.

Teacher's Note:
1. A
2.
3. b
4. r
5. o
6. a
7. d
8.
9. s
10. p
11. e
12. c
13. t
14. r
15. u
16. m
17.
18. a
19. n
20. t
21. i
22. b
23. i
24. o
25. t
26. i
27. c
28.
29. i
30. s
31.
32. e
33. f
34. f
35. e
36. c
37. t
38. i
39. v
40. e
41.
42. a
43. g
44. a
45. i
46. n
47. s
48. t
49.
50. a
51.
52. w
53. i
54. d
55. e
56.
57. r
58. a
59. n
60. g
61. e
62.
63. o
64. f
65.
66. o
67. r
68. g
69. a
70. n
71. i
72. s
73. m
74. s
75. .
76.
77. T
78. e
79. t
80. r
81. a
82. c
83. y
84. c
85. l
86. i
87. n
88. e
89.
90. i
91. s
92.
93. a
94.
95. s
96. t
97. a
98. n
99. d
100. a
101. r
102. d
103.
104. e
105. x
106. a
107. m
108. p
109. l
110. e
111. .

Answer: (a) Both A and R are true, and R is the correct explanation of A.

Explanation:
1. Sedatives depress the central nervous system and produce calmness, so they are given to agitated patients.
2. Both statements are true and the reason explains the assertion.

Teacher's Note:
1. S
2. m
3. a
4. l
5. l
6.
7. d
8. o
9. s
10. e
11. s
12.
13. o
14. f
15.
16. s
17. e
18. d
19. a
20. t
21. i
22. v
23. e
24. s
25.
26. b
27. r
28. i
29. n
30. g
31.
32. r
33. e
34. l
35. a
36. x
37. a
38. t
39. i
40. o
41. n
42.
43. a
44. n
45. d
46.
47. d
48. r
49. o
50. w
51. s
52. i
53. n
54. e
55. s
56. s
57. .
58.
59. O
60. v
61. e
62. r
63. u
64. s
65. e
66.
67. c
68. a
69. n
70.
71. l
72. e
73. a
74. d
75.
76. t
77. o
78.
79. d
80. e
81. p
82. e
83. n
84. d
85. e
86. n
87. c
88. e
89. .