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JEE Main 2025 Jan 29 Shift 1, Chemistry Q6: Introduction

JEE Main2025Jan 29, Shift 1Chemistry
Q.

Choose the correct statements.

(A) Weight of a substance is the amount of matter present in it.

(B) Mass is the force exerted by gravity on an object.

(C) Volume is the amount of space occupied by a substance.

(D) Temperatures below 0°C are possible in Celsius scale, but in Kelvin scale negative temperature is not possible.

(E) Precision refers to the closeness of various measurements for the same quantity.

  1. A

    (B), (C) and (D) Only

  2. B

    (A), (B) and (C) Only

  3. C

    (A), (D) and (E) Only

  4. D

    (C), (D) and (E) Only

Solution

Statements (A) and (B) swap the standard definitions: mass measures the amount of matter, while weight is the gravitational force on the body. Both are therefore incorrect.

(C) correctly defines volume. (D) is correct because is the absolute zero, so the Kelvin scale cannot take negative values, whereas the Celsius scale routinely does. (E) correctly captures the meaning of precision (reproducibility of repeated measurements).

Correct statements are (C), (D), (E).

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