101) Consider the following statements and select your answer
Assertion (A) : Electron microscopes can give better resolution than optical microscopes.
Reason (R) : A high energy particle has a short de Broglie wavelength and so can probe the small scale interior structure of other particles.
Ans : A & R correct
102) 4[NHsOH]+ -» N20 + 2NH’ + 2H+ + 3H20
(X)
|
00
| ||
X
|
Y
|
Z
| |
(A)
|
+1
|
0
|
-3
|
(B)
|
-1
|
1
|
-2
|
(C)
|
-1
|
-2
|
-3
|
(D)
|
-1
|
1
|
-3
|
Ans :
103) During the oxidation of acidified ferrous ammonium sulphate with dichromate solution :
(A) The oxidation number of chromium and iron changes from +6 to +3 and +3 to +2 respectively
(B) The oxidation number of chromium and iron changes from +3 to +6 and +3 to +2 respectively
(C) The oxidation number of chromium and iron changes from +6 to +3 and +2 to +3 respectively
(D) The oxidation number of chromium and iron changes from +2 to +3 and +6 to +3 respectively
Ans :
104) Arrange the sequences of mitosis in a logic way.
I. Centromeres of chromosomes attaches to spindle fibre.
II.Chromatids uncoil and cytokinesis occur.
III. Asters and spindle fibres are formed.
IV. Centromers split into two, daughters centromeres move apart.
(A) III, IV, I, II (B) II, IV, III, I
(C) II, III, IV, I (D) III, I, IV, IT
Ans :
105) Inhibition of gastric secretion is brought about by
(A) Pancreozymin
(B) Gastrin
(C) Enterogastrone
(D) Cholecytokinin
Ans : (B) Gastrin
106) Which of the following statements about respiration is true?
I. Respiration results in loss of dry weight in plants..
II. The intermediate chemical reactions in the breakdown of sugar in respiration and
synthesis of sugar in photosynthesis are much the same.
III. The oxygen concentration is not known to affect respiration.
IV. Respiration is a constructive process.
(A) I, II and IV
(C) I and II only
Ans : A
107) Angiosperms differ from gymnosperms by
(A) Being evergreen
(B) Having compound leaves
(C) Being smaller in size
(D) Having ovule enclosed in the ovary
Ans : A
108) Match List I with List II and select the correct answer using the codes
River■ Empties into
(a) Hwang-Ho : Beaufort s
(b) Niger : Yellow sea
(c) Volga : Gulf of Guinea
(d) Mackenzie : Caspian sea
| (a) | (b) | (c) |
. (d)
| |
| (A) | 2 |
1
|
3
| 4 |
| (B) | 2 |
3
|
4
|
1
|
| (C) | 1 |
3
| 2 | 4 |
| (D) | 4 | 2 | 1 |
3
|
Ans : B
109) Consider the following statements :
Assertion (A) : Copper is mainly used in Electrical Engineering Industry.
Reason (R) : Copper has the property of high conductivity.
1) Both (A) and (R) are true and (R) explains (A) correctly.
2) Both (A) and (R) .are true but.(R) does not explain (A).
3) (A) is true but (R) is false.
4) (A) is false but (R) is true.
Ans : 1
110) Arrange the following plants species in descending order based on their altitude.
(A) Junipers – Deodar-Maple – Teak
(B) Deodar – Junipers – Maple – Teak
(C) Junipers – Teak – Deodar – Maple
(D) Deodar — Junipers — Teak – Maple
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