RRB Group D 2025 Question Paper (10-Aug-2026) (Shift 2)

Question 1

During balancing of the following equation, a student first balances hydrogen instead of oxygen.$\mathrm{Fe + H_2O \rightarrow Fe_3O_4 + H_2}$What is the main difficulty this approach may cause?

Accepted Answer

Oxygen atoms remain highly unequal

Answer

Chemical formulas must be modified

Answer

Law of conservation becomes invalid

Answer

Coefficients become impossible values

Question 2

Which saturated hydrocarbon has the molecular formula $\mathrm{C_3H_6}$?

Accepted Answer

Cyclopropane

Answer

Propane

Answer

Propene

Answer

Propyne

Question 3

Which of the following is a practical reason for using a series combination of resistors in an electrical circuit?

Accepted Answer

To increase total resistance and limit current

Answer

To maintain the same voltage across each resistor

Answer

To decrease voltage across each resistor

Answer

To increase the current in the circuit

Question 4

Which of the following best describes Thomson's model of an atom?

Accepted Answer

An atom consists of a positively charged sphere with electrons embedded in it.

Answer

Electrons are randomly placed outside the atom.

Answer

Electrons revolve around the nucleus in fixed orbits.

Answer

An atom is a dense positively charged nucleus with electrons outside.

Question 5

A plant sample, when tested, has vascular tissues (xylem and phloem) but no seeds. Which group does it belong to?

Accepted Answer

Pteridophyta

Answer

Bryophyta

Answer

Thallophyta

Answer

Gymnosperm

RRB Group D 2025 Question Paper (10-Aug-2026) (Shift 2)

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