RRB Group D 2025 Question Paper (21-Aug-2026) (Shift 2)

Question 1

A student adds hydrochloric acid to sodium hydrogen carbonate. Which observation confirms neutralization?

Accepted Answer

Effervescence

Answer

Temperature drops

Answer

Precipitate forms

Answer

Color turns red

Question 2

Cell culture refers to the process of growing cells __________.

Accepted Answer

outside the body

Answer

only in soil

Answer

without nutrients

Answer

inside the body

Question 3

Where are reflex arcs primarily formed in the human body?

Accepted Answer

Spinal cord

Answer

Brain

Answer

Lungs

Answer

Heart

Question 4

What is the term for the growth of plant roots downward in response to gravity?

Accepted Answer

Geotropism

Answer

Phototropism

Answer

Hydrotropism

Answer

Chemotropism

Question 5

Which statement best describes the direction of velocity in uniform circular motion?

Accepted Answer

It is always tangent to the circle at any point

Answer

It is always along the radius away from the center

Answer

It is always directed towards the center

Answer

It is always perpendicular to the plane of the circle