RRB · General Science
28/11/2025 (4:30 PM - 6:00 PM) — General Science
2025
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12 questions
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Q1
mcq
When solid lead(II) nitrate is heated, a yellow residue (PbO) is left behind and two gases are evolved — one is reddish-brown and the other supports combustion. Which gases are evolved?
a.
Nitrogen dioxide and oxygen
Correct Answer
b.
Nitric oxide and oxygen
c.
Nitrogen gas and carbon dioxide
d.
Nitrogen dioxide and hydrogen
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Q2
mcq
As Newton is to weight, _____________ is to pressure.
a.
Pascal
Correct Answer
b.
Kilogram
c.
Kelvin
d.
Kilogram per cubic metre
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Q3
mcq
In Mendel’s experiment, what did he observe in the F1 generation when he crossed a tall (TT) and a short pea (tt) plant?
a.
All were short
b.
Half were tall, half was short
c.
All were tall
Correct Answer
d.
All were medium height
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Q4
mcq
A fluid filled in a container exerts pressure _______ at the same height.
a.
only downward
b.
equally in all directions of the container
Correct Answer
c.
only upward
d.
only on the sides
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Q5
mcq
Which of the following metals reacts most vigorously with water?
a.
Iron
b.
Sodium
Correct Answer
c.
Lead
d.
Zinc Test Date 28/11/2025 Test Time 4:30 PM - 6:00 PM Subject RRB Level 01 Stage I * Note Correct Answer will carry 1 mark per Question. Incorrect Answer will carry 1/3 Negative mark per Question. 1. Options shown in green color with a tick icon are correct. 2. Chosen option on the right of the question indicates the option selected by the candidate.
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Q19
mcq
Which one of the following is an advantage of vegetative propagation in flowering plants?
a.
They are completely different from their parent plants.
b.
They can flower and fruit later than those produced by seeds.
c.
They can flower and fruit earlier than those produced by seeds.
Correct Answer
d.
They can show completely new characters than those produced by seeds.
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Q20
mcq
What is the relationship between the incident ray and the emergent ray after light passes through the two parallel opposite faces of a rectangular glass slab?
a.
The emergent ray is parallel to the direction of the incident ray, but shifted sideward slightly
Correct Answer
b.
The emergent ray converges to a point on the principal axis
c.
The emergent ray is reflected back along the path of the incident ray
d.
The emergent ray is perpendicular to the incident ray
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Q21
mcq
Which of the following methods is commonly used to prevent the corrosion of iron?
a.
Coating the metal with paint or oil
Correct Answer
b.
Heating the metal repeatedly
c.
Cooling the metal with water regularly
d.
Dissolving the metal in acid
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Q22
mcq
Which of the following is NOT a contraceptive method?
a.
Preventing sperm from reaching the egg by using condoms
b.
Aborting the foetus
Correct Answer
c.
Inserting Copper-T into the uterus
d.
Altering hormonal balance to prevent release of eggs from the ovary
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Q23
mcq
Which of the following meristems is responsible for the lengthwise growth at the ends of shoots and roots?
a.
Intercalary meristem
b.
Lateral meristem
c.
Permanent meristem
d.
Apical meristem
Correct Answer
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Q24
mcq
Which of the following metallic oxides can be reduced to metals by heating alone?
a.
Manganese oxide
b.
Mercuric oxide
c.
Iron (III) oxide
d.
Zinc oxide
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Q25
mcq
Which process is used to prepare sodium hydroxide from brine?
a.
Haber process
b.
Solvay process
c.
Thermal decomposition of NaCl
d.
Electrolysis of brine
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