RRB Group D 2025 Question Paper (25-Aug-2026) (Shift 3)

Question 1

What characteristic is shared by both bacteria and cyanobacteria?

Accepted Answer

Both are single-celled prokaryotes

Answer

Both possess well defined nucleus

Answer

Both live in the gut of ruminants

Answer

Both reproduce by forming seeds

Question 2

Which of the following observations would violate the law of constant proportions?

Accepted Answer

A sample of magnesium sulphide containing magnesium and sulphur in a 4:3 mass ratio.

Answer

A sample of ammonia containing nitrogen and hydrogen in a 14:3 mass ratio.

Answer

A sample of sodium chloride with sodium and chlorine in a 23:35.5 mass ratio.

Answer

A sample of water containing hydrogen and oxygen in a 1:8 mass ratio.

Question 3

Why does coal have a higher carbon content compared to the original plant material?

Accepted Answer

Water and volatile substances are lost during coal formation

Answer

Minerals are added to plant remains in the soil

Answer

Gas from the atmosphere is absorbed by the plants

Answer

Sunlight increases the carbon in buried plants

Question 4

A chemist keeps calcium carbonate, silver chloride, and lead nitrate exposed to sunlight. Which compound/s show/s a visible change?

Accepted Answer

Only silver chloride

Answer

Only lead nitrate

Answer

All three compounds

Answer

Only calcium carbonate

Question 5

An object moving with kinetic energy 800 J experiences a net work of −600 J. What happens to the object?

Accepted Answer

It moves with half speed

Answer

It continues with same speed

Answer

It stops moving

Answer

It doubles its speed