RRB Group D 2018-14-12-2018-2 RRB Question Paper

RRB Group D 2018 Question Papers

RRB Group D 2018-14-12-2018-2 RRB Questions

21.

When an acid reacts with a carbonate or metal hydrogen, it forms salts, carbon dioxide gas and water accordingly. Which of the following equations is correct for this chemical reaction?

A.

Na₂CO₃(s) + HCl(aq) → 2NaCl(aq) + H₂O(l) + 2CO₂(g) + H₂O(l)

B.

Na₂CO₃(s) + HCl(aq) → NaCl(aq) + H₂O(l) + CO₂(g)

C.

Na₂CO₃(s) + 2HCl(aq) → 2NaCl(aq) + H₂O(l) + CO₂(g)

D.

Na₂CO₃(s) + 2HCl(aq) → 2NaCl(aq) + 2CO₂(g)

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ANSWER :

C. Na₂CO₃(s) + 2HCl(aq) → 2NaCl(aq) + H₂O(l) + CO₂(g)

22.
More diversity is allowed for breeding by _____.
A.
Vegetative propagation
B.
Tissue culture
C.
Asexual reproduction
D.
Sexual reproduction
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ANSWER :
D. Sexual reproduction
23.
The least common multiple and highest common factor of two numbers are 90 and 9 respectively and one of those numbers is 18. What is the second number:
A.
9
B.
36
C.
45
D.
30
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ANSWER :
C. 45
24.
54 ÷ 6 + 3 × 3 = ?
A.
15
B.
5
C.
18
D.
36
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ANSWER :
C. 18
25.
The table below shows the passing percentage of four schools in four years.
The percentage of which school is increasing sequentially (gradually)?
A.
XYZ
B.
ABC
C.
DEF
D.
PQR
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ANSWER :
D. PQR
26.

The elevation angle of the tower is 30° from the 18 m high top of a platform. If the height of the tower is 78 m, then what is the distance of the tower from the platform?

A.

60 m

B.

20\(\sqrt{3}\) m

C.

70\(\sqrt{3}\) m

D.

60\(\sqrt{3}\) m

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ANSWER :

D. 60\(\sqrt{3}\) m

27.
To get the result of the equation given as 5, Enter the mathematical symbol in place of '?': ((120?110)?5)?10 = 5
A.
-, ÷, ÷
B.
+, ÷, ×
C.
-, +, +
D.
-, ×, ÷
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ANSWER :
D. -, ×, ÷
28.
Which scheme aims to provide piped water supply to villages powered by solar energy
A.
Swajal Scheme
B.
Gangajal Scheme
C.
Pure water scheme
D.
Ground water scheme
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ANSWER :
A. Swajal Scheme
29.
Who wrote the epic Ramayana?
A.
Chitragupta
B.
Valmiki
C.
Chanakya
D.
Dronacharya
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ANSWER :
B. Valmiki
30.
_____ of the stems and roots also store nutrients and water.
A.
Parenchyma
B.
Xylem
C.
Collenchyma
D.
Sclerenchyma
😑 View Answer Rough Work
ANSWER :
A. Parenchyma