RRB Group D 2025 Question Paper (13-Aug-2026) (Shift 3)

Question 1

Why are metals like sodium and potassium not found in the free state in nature?

Accepted Answer

Because they have high reactivity.

Answer

Because they have low melting points.

Answer

Because they are soluble in nature.

Answer

Because they are high density.

Question 2

A student wants to use the Right Hand Thumb Rule to determine the direction of the magnetic field around a current-carrying straight conductor. Which of the following steps is essential in applying the rule correctly?

Accepted Answer

Point the thumb in the direction of current

Answer

Wrap fingers in the direction of the conductor

Answer

Align the thumb with the magnetic field

Answer

Use the left hand for orientation

Question 3

A convex lens forms a real, inverted image of an object placed at a distance of 30 cm from the lens. The image is found to be formed at a distance of 60 cm on the other side of the lens. What is the focal length of the lens?

Accepted Answer

20 cm

Answer

18 cm

Answer

15 cm

Answer

12 cm

Question 4

If the refractive index of medium 2 with respect to medium 1 is n21, which formula correctly represents n21?

Accepted Answer

n21 = Speed of light in medium 1 divided by speed of light in medium 2.

Answer

n21 = Speed of light in medium 2 minus speed of light in medium 1.

Answer

n21 = Speed of light in medium 1 minus speed of light in medium 2.

Answer

n21 = Speed of light in medium 2 divided by speed of light in medium 1.

Question 5

How does Paramecium ensure that food particles are directed to its intake spot?

Accepted Answer

Uses movement of cilia covering the cell surface

Answer

Forms pseudopodia to engulf food

Answer

Releases enzymes to move food particles

Answer

Utilises contractile vacuoles for food transport

RRB Group D 2025 Question Paper (13-Aug-2026) (Shift 3)

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