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ANSWERS
1. (1)
2. (4)
3. (3)
4. (4)
5. (2)
6. (4)
7. (4)
8. (1)
9. (2)
10. (4)
11. (2)
12. (1)
13. (1)
14. (3)
15. (2)
16. (4)
17. (2)
18. (2)
19. (2)
20. (4)
21. (2)
22. (2)
23. (1)
24. (3)
25. (3)
26. (2)
27. (3)
28. (3)
29. (2)
30. (4)
31. (3)
32. (1)
33. (4)
34. (1)
35. (2)
36. (3)
37. (1)
38. (4)
39. (2)
40. (2)
41. (3)
42. (2)
43. (4)
44. (4)
45. (4)
46. (3)
47. (3)
48. (2)
49. (4)
50. (3)
51. (4)
52. (4)
53. (1)
54. (4)
55. (1)
56. (1)
57. (2)
58. (2)
59. (4)
60. (3)
61. (3)
62. (3)
63. (2)
64. (3)
65. (4)
66. (1)
67. (1)
68. (3)
69. (4)
70. (3)
71. (2)
72. (2)
73. (3)
74. (4)
75. (3)
76. (3)
77. (4)
78. (3)
79. (4)
80. (3)
81. (1)
82. (3)
83. (3)
84. (3)
85. (2)
86. (2)
87. (2)
88. (3)
89. (4)
90. (3)
91. (3)
92. (4)
93. (2)
94. (2)
95. (3)
96. (1)
97. (1)
98. (3)
99. (2)
100. (3)
101. (3)
102. (2)
103. (4)
104. (4)
105. (2)
106. (3)
107. (2)
108. (2)
109. (1)
110. (2)
111. (1)
112. (3)
113. (3)
114. (4)
115. (2)
116. (1)
117. (4)
118. (4)
119. (3)
120. (1)
121. (2)
122. (4)
123. (4)
124. (4)
125. (1)
126. (2)
127. (4)
128. (2)
129. (2)
130. (4)
131. (2)
132. (4)
133. (2)
134. (1)
135. (2)
136. (4)
137. (3)
138. (3)
139. (2)
140. (4)
141. (3)
142. (3)
143. (1)
144. (3)
145. (4)
146. (4)
147. (4)
148. (4)
149. (2)
150. (3)
151. (4)
152. (2)
153. (2)
154. (2)
155. (4)
156. (2)
157. (4)
158. (4)
159. (4)
160. (1)
161. (3)
162. (3)
163. (3)
164. (4)
165. (3)
166. (4)
167. (2)
168. (4)
169. (4)
170. (3)
171. (3)
172. (1)
173. (3)
174. (2)
175. (2)
176. (3)
177. (4)
178. (4)
179. (3)
180. (4)
Regd. Office: Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph. 011-47623456
MM : 720 Mock Test for NEET - 2020 Time : 3 Hrs.
Home Assignment – 8
08/07/2020
(2)
Home Assignment-8 (Answers and Hints) Mock Test for NEET - 2020
Answers and Hints
1. Answer (1)
t sec
–4
6v
3 5
1 12 1 4 2
2 2 S
S = 5m
2. Answer (4)
x
dxv t
dt
3
2
y
dy dy dx tv
dt dx dt
At t = 2
2 4 � � �v i j m/s
3. Answer (3)
Time of flight = 3 + 7
= 10 sec
90 = ucos × 4 ...(i)
R = ucos × 10 ...(ii)
90 4
10
R
R = 225 m
4. Answer (4)
For minimum time swimmer should swinperpendicular to river.
5. Answer (2)
Mg = Fsin + Fcos
sin cos
Mg
F
6. Answer (4)
Area of F – t curve = p
O = p2 – p
1
p2 = p
1 = 20 kg m/s
7. Answer (4)
Work done by gravity is zero during total motion ofprojectile so it average power will also zero.
8. Answer (1)
22
0
1 11.2 25
2 2 K I t
2
0
11500 1.2 625
2 t
t0 = 2 sec
9. Answer (2)
4y – 3x = 2
3 1
4 2 y x
= 37°
37°y
x
5 m/s
13 5cos37
2 L
= 4 1
3 55 2
= 6 kgm2s–1
10. Answer (4)
W = Uf – U
i
=
2 23
32
Gm Gm
a a
=
23
2
Gm
a
11. Answer (2)
Regd. Office: Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph. 011-47623456
MM : 720 Mock Test for NEET - 2020 Time : 3 Hrs.
Home Assignment – 8
08/07/2020
(3)
Mock Test for NEET - 2020 Home Assignment-8 (Answers and Hints)
12. Answer (1)
P
v
CQ
U C
70 7
5
U U = 50 cal
13. Answer (1)
14. Answer (3)
80 60 80 6030
10 2
K
60 6030
10 2
T TK
T = 48°C
15. Answer (2)
1 s l
n l n l
n × 10 = (n – 1)12
10n = 12n – 12
n = 6
16. Answer (4)
y = acos(kx – t) – acos(kx + t)
y = 2asinkxsint
17. Answer (2)
1.21Å2 2
= 1.21 Å
18. Answer (2)
(3f)P (3f)P (3f)S(2f)
19. Answer (2)
1
12
6 I = 2Amp
2
12
12I = 1Amp
2 4AI1
I2
B
39
12 v
VA – 0 = 8
VB – 0 = 3
VA – V
B = 8 – 3 = 5 volt
20. Answer (4)
Current in B4 bulb is maximum so it glow more
brightly.
21. Answer (2)
4 41
100 100
IG I S
24 G
S ohm
22. Answer (2)
2. . �
dBE dl r
dt
E r
23. Answer (1)
110cos100
600 v
10cos6
v
= 5 3 volt
24. Answer (3)
2 2
1 1 1
1 3
R
8
9 h
P Rh
25. Answer (3)
2
2 2
1 132.4 13.6
3 4
z
z = 7
26. Answer (2)
BE = m x 931 Mev
27. Answer (3)
28. Answer (3)
29. Answer (2)
30. Answer (4)
0 0 0aEM L T
t
2 2
0 0 0
a ML T
M L TT
a = (M–1L–2T3) = b
31. Answer (3)
mu
2m mv1
=
2mv2
mu = mv1 + 2mv
2
u = v1 + 2v
2...(i)
v2 – v
1 = u ...(ii)
(i) & (ii)
3v2 = 2u
2 2
2 1,
3 3 v u v u
% k =
2
2
1 8
2 9100 88.8%
1
2
m u
mu
(4)
Home Assignment-8 (Answers and Hints) Mock Test for NEET - 2020
32. Answer (1)
v0
v
mv0r = mvr +
22
5
vmr
r
0
5
7v v
33. Answer (4)
2 2
2
3 3 ml ml
I ml
25
3I ml
34. Answer (1)
80 20 ( 60)
2 3
l l l
KA KA KA
2(80 –) = ( – 20) + 3( – 60)
160 – 2 = – 20 + 3 – 180
= 60°
35. Answer (2)
8 dvE x
dx
8 �
�E i
36. Answer (3)
8 3 11 net
R
4 123
11 11
ABV
1250 0.5
11 100
E eV
37. Answer (1)
0 02.
4 4
IIB
R R
38. Answer (4)
5' 5
1
I mA
k
5 = 5 × 10–3 × 5
S = 1 k
39. Answer (2)
7
x
x + 7 = 25, x = 18 cm
40. Answer (2)
sin2
cot2
cos2
mA
A
A
m = (180 – 2A)
41. Answer (3)
10 cm
v = 60 cm
x
1 1 1 f v u
1 1 1
20 30 v
v = 60 cm
x = 60 – 10 = 50 cm
42. Answer (2)
10 –(10)4500 10 6000 10
hc hc
KE
= 0.63 eV
43. Answer (4)
E = 1.5 – (–13.6)eV
44. Answer (4)
It is equal to time of half life.
45. Answer (4)
80 c
b
I
I
Ie
– Ib + I
c
Ib = 0.1 mA
46. Answer (3)
(CH ) – C – OH3 3
(CH ) C– O Na3 3
+
(CH ) – C – O – CH CH 3 3 2 3
Na
(A)
C H Br2 5
(B
47. Answer (3)
Fact
48. Answer (2)
In gas phase, +I effect decides the basicity while inaqueous solution, it is the combined effect of +Ieffect, hydration and steric hindrance.
(5)
Mock Test for NEET - 2020 Home Assignment-8 (Answers and Hints)
49. Answer (4)
Epimess differ in the configuration about anyunsymmetrical carbon other than anomeric carbon.
50. Answer (3)
In anionic detergent, the negative part of themolecule is responsible for cleansing action.
51. Answer (4)
P1 = 715 – 15 = 700 mm Hg, V
1 = 30 ml,
T1 = 300K
STP STP 1 1
STP 1
P V P V
T T
STP
700 30 273V 25.14 ml
300 760
2
25.14W(N ) 28 0.0314g
22400
0.0314
% nitrogen 100 6.28%0.5
52. Answer (4)
In (1), it is syn-addition to form glycol.
In Answer (2), oxidation takes place to formdicarboxylic acid.
53. Answer (1)
2 2(excess) Potassium superoxide
K O KO
Superoxide ion is paramagnetic and coloured.
54. Answer (4)
Orthoboric acid (H3BO
3) is formed which is
polymeric due to hydrogen bonding.
55. Answer (1)
3KE nRT
2
= 0
3 WRT
2 M
0 3 W R TM
2 KE
3 8 2 30016 g (Approx)
2 447
The gas is CH4
56. Answer (1)
Since a bomb calorimeter has constant volume,
So w = 0, (w = – PV)
Zn(s) + 2HCl(aq) ZnCl2(aq) + H
2(g)
Since heat is evolved in the above reaction,
so U < O.
57. Answer (2)
PCl3Br
2 is unsymmetrical with net dipole moment
while PBr3Cl
2 is symmetrical with zero dipole
moment.
58. Answer (2)
Fact
59. Answer (4)
2
2paschen
1 1R 3 0
3
paschen
1
R
2
2 2visible
1 1 1 5RR 2
92 3
visible
9
5R
paschen
visible
5
9
60. Answer (3)
2 2H (g) Br (g) 2HBr(g) ���⇀
↽���
Initial : 15ml 20ml 0
Final : 5ml 10ml 20
20 20K 8
5 10
for the reaction :
2 22HBr(g) H (g) Br (g)���⇀
↽���
Equilibrium constant = 1
0.1258
61. Answer (3)
Because H3PO
4 does not have P–H bond.
62. Answer (3)
Fact
63. Answer (2)
The corresponding elements of second and thirdtransition series have almost similar atomic radii.
64. Answer (3)
Fact
65. Answer (4)
Fact
66. Answer (1)
Fact
67. Answer (1)
Higher the effective concentration, higher is theboiling point.
(6)
Home Assignment-8 (Answers and Hints) Mock Test for NEET - 2020
68. Answer (3)
m
K1000
C
232.3 0.05K
1000
= 1.162 ×10–2 –1 cm–1
Conductance = K
cell cons tant
= 2
1.162 10
0.367
= 0.0316 –1
69. Answer (4)
For the same oxidation number, the strength ofoxoacids of halogen decreases with the increase inthe size of the halogen.
70. Answer (3)
[Co(NH3)3(NO
2)3]
The complex doesnot show optional isomerism.
71. Answer (2)
Cr2O
7
2– + 3Sn+2 + 14H+ 2Cr+3 + 3Sn+4 + 7H2O
3 moles of Sn+2 requires = 1 mole of Cr2O
7
2–
0.03 moles of Sn+2 requires = 0.03 moles of Cr2O
7
2–
72. Answer (2)
Fact
73. Answer (3)
x 1log logP logK (n 1)
m n
1
Slopen
1
O 1n
74. Answer (4)
Fact
75. Answer (3)
For bcc metallic structure,
a 3R
4
4 1.86a
1.732
= 4.3 Å
d = 2R
= 2 × 1.86
= 3.72Å
76. Answer (3)
Ag Ag
Al Al
w E
w E
Ag
108w 4.5
9
= 54g
77. Answer (4)
Molecularity is defined for only elementary reactions
78. Answer (3)
(B) is B2O
3
(c) is Ni(BO2)2 brown
79. Answer (4)
Fact
80. Answer (3)
Perhydrol is H2O
2
81. Answer (1)
Due to maximum hyperconjugation.
82. Answer (3)
Eclipsed has higher energy than staggered due totorsional strain.
83. Answer (3)
Among Rx, C–Cl bond has highest dipole momentwhile R–I has maximum boiling point for the givenalkyl group.
84. Answer (3)
(CH ) CH – OH3 2
(CH ) CH – I3 2
(CH ) CH – NO3 2 2
(CH ) C – NO3 2 2
P + I2
AgNO2
HNO2
N = 0
85. Answer (2)
(A) is CH3COOC
2H
5
(B) is CH – C – OH3
CH3
CH3
86. Answer (2)
N = N
Azobenzene
(7)
Mock Test for NEET - 2020 Home Assignment-8 (Answers and Hints)
87. Answer (2)
Electron given enthalpy of fluorine is negative.
88. Answer (3)
Due to resonance, bond order is 4/3.
N
O
OO
]–
89. Answer (4)
Common ion effect decreases the solubility. Due toreaction with ammonia, solubility in it is enhanced.
90. Answer (3)
N + 3H 2NH2 2 3
�
1 mol 3 mol 0
1
2–3
23
1–1 mole
Initial
Final
Moles of H2 =
3
2
Weight of H2 =
3
2× 2 = 3g
91. Answer (3)
Used for plants and animals. Each statement is lead.
92. Answer (4)
Both (1) & Answer (3)
93. Answer (2)
Shorter dikaryophase and crozier are feature ofascomycetes.
94. Answer (2)
Diatoms dont have flagella on somatic body.Chrysophytes include diatoms and golden algae
95. Answer (3)
96. Answer (1)
Used preferably 100’s of characters.
97. Answer (1)
98. Answer (3)
Sphagnum is peat or bog or cotton moss.
99. Answer (2)
Opposite phyllotary.
100. Answer (3)
101. Answer (3)
Fascicular vascular cambium - primary lateralmeristem. Interfascicular cambium and corkcambium - secondary lateral meristem.
102. Answer (2)
Physiologically inactive - heart wood
103. Answer (4)
RBC 52% protein, 40% lipid
104. Answer (4)
9 doublet fibrils at periphery.
105. Answer (2)
106. Answer (3)
107. Answer (2)
Simple diffusion does not show transport saturation.
108. Answer (2)
KGA + NH4+ Glutamate DH glutamic acid + H
2O
109. Answer (1)
110. Answer (2)
Doesnot show photorespiration
111. Answer (1)
Breakdown of pyruvate molecule produces 4 NADH& 1 FADH
2. For each NADH & FADH
2 oxidation one
oxygen atom in required
112. Answer (3)
(C) Pyruvic acid
113. Answer (3)
Phellogen, interfascicular cambium - Dedefferentiation
114. Answer (4)
Promote root formation
115. Answer (2)
116. Answer (1)
117. Answer (4)
Shape of cell in spindle like.
118. Answer (4)
Aplospory produces haploid embryo
119. Answer (3)
Gamete (n)
PEN (3n)
120. Answer (1)
121. Answer (2)
122. Answer (4)
Sterile males
123. Answer (4)
Two chains are antiparallel.
Backbone is sugar & PO4.
124. Answer (4)
Translocase is involved in protein synthesis.
125. Answer (1)
3 structural genes (z, y, a)
126. Answer (2)
Meristem is free from viruses.
(8)
Home Assignment-8 (Answers and Hints) Mock Test for NEET - 2020
127. Answer (4)
Produced in IRRI, Philippines
128. Answer (2)
Cyclosporin A - Trichoderma
129. Answer (2)
BOD in reduced to 15% of its original value
130. Answer (4)
Competition (– –)
Predation (+ –)
Mutualism (+ +)
131. Answer (2)
132. Answer (4)
Size of organisms increases with trophic level
133. Answer (2)
134. Answer (1)
Diversity decreases from lower to higher latitude.Indigenous catfishes are eliminated by exotic speciesClarias
135. Answer (2)
National park : In situ conservation stragegy.
136. Answer (4)
Decrease in mortality rate is the main reason forrapid increase in population.
137. Answer (3)
138. Answer (3)
Aspirin and disprin cause erosion of gastric mucosa,damaging it
139. Answer (2)
140. Answer (4)
141. Answer (3)
Archaeocytes and interstitial cells are totipotent cellsof porifera and coelenterata respectively.
142. Answer (3)
Annelids and arthropods have protostomic tube withinbody plan, bilateral symmetry and schizocoelom.
143. Answer (1)
Mean arterial pressure
= diastolic pressure + 1
3(Pulse pressure)
144. Answer (3)
Urea enters into the thin segment of loop of henle.
145. Answer (4)
146. Answer (4)
‘Lubb’ sound is produced at the end of atrial systoleor begining of ventricular systole.
147. Answer (4)
148. Answer (4)
149. Answer (2)
Inbreeding increases the homozygosity.
150. Answer (3)
151. Answer (4)
152. Answer (2)
Activation of proto-oncogenes leads to cancers.
153. Answer (2)
Cyclostomata are jawless vertebrates.
154. Answer (2)
155. Answer (4)
156. Answer (2)
Lipids get extracted in acid insoluble fraction.
157. Answer (4)
158. Answer (4)
159. Answer (4)
160. Answer (1)
161. Answer (3)
‘Ori’ site controls the origin of replication of plasmidsand their copy number.
162. Answer (3)
Cross breeding is mating of animals of differentbreeds.
163. Answer (3)
164. Answer (4)
165. Answer (3)
166. Answer (4)
167. Answer (2)
IUDs are the most accepted methods ofcontraception in India.
168. Answer (4)
‘Neries’ has both setae and parapodia while leechlacks both of them.
169. Answer (4)
Fertilization is internal in aves.
170. Answer (3)
The given characteristics are of smooth muscles.
(9)
Mock Test for NEET - 2020 Home Assignment-8 (Answers and Hints)
171. Answer (3)
Microglial cells are mesodermal in origin.
172. Answer (1)
Tight junctions prevent the leakage/exchange ofmaterial between adjacent cells.
173. Answer (3)
174. Answer (2)
Maltose and straight chains of glycogen have (1 4) glycosidic bonds.
175. Answer (2)
Ptyalin or salivary amylase is starch digestingenzyme.
176. Answer (3)
177. Answer (4)
178. Answer (4)
Glucocorticoids promote/stimulate gluconeogenesislipolysis and proteolysis.
179. Answer (3)
Interneurons are absent in monosynaptic reflexes.
180. Answer (4)
After forced expiration, expiratory reserve volume,tidal volume and inspiratory reserve volume can beinhaled during maximum forceful inhalation.
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