jee mains previous year question q24

Choose the correct statements – Some Basic Concepts of Chemistry | JEE Main PYQ

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.

Choose the correct answer from the options given below :

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

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

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

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

Correct Answer: (C), (D) and (E) Only

Explanation

Statement (A) is incorrect because weight is the force due to gravity, not amount of matter.

Statement (B) is incorrect because mass is the amount of matter, not force.

Statement (C) is correct as volume is defined as space occupied.

Statement (D) is correct because Kelvin scale does not allow negative temperatures.

Statement (E) is correct as precision refers to closeness of repeated measurements.

Previous Questions

Density of 3 M NaCl solution is 1.25 g/mL. The molality of the solution is Concentrated nitric acid is labelled as 75% by mass. The volume in mL of the solution which contains 30 g of nitric acid is 20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is 2.8 × 10⁻³ mol of CO₂ is left after removing 10²¹ molecules. The mass of CO₂ taken initially is During sulphur estimation, 160 mg of an organic compound gives 466 mg of barium sulphate. The percentage of sulphur is

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