Some Basic Concepts of Chemistry · Question 32

Choose the correct statements. Choose the correct answer from the options given below :

1. (B), (C) and (D) Only
2. (A), (B) and (C) Only
3. (C), (D) and (E) Only
4. (A), (D) and (E) Only

Answer

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

Solution

(A) Incorrect. As per NCERT, mass is the amount of matter present in a substance; weight is the force exerted by gravity on an object.

(B) Incorrect. This is the definition of weight, not mass.

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

(D) Correct. Temperatures below 0°C (negative values) are possible on the Celsius scale; 0 K is the lowest possible temperature, so negative values are not possible on the Kelvin scale.

(E) Correct. Precision refers to the closeness of various measurements for the same quantity (accuracy is agreement with the true value).

(C), (D) and (E) only

Answer: (3)