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Class 9 Physics · Chapter 6 · Test 5

Density and Pressure

34 MCQs

MCQs

34 questions · 30 min · 34 marks

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Sample questions

The first 5 of 34. Try each one, then tap to see the answer.

  1. Question 1

    Density is defined as:

    • AMass per unit volume
    • BVolume per unit mass
    • CForce per unit area
    • DMass multiplied by volume
    Show answer

    Answer: A

    Density is the mass of a substance divided by its volume.

  2. Question 2

    The SI unit of density is:

    • Ag/cm
    • Bkg/m³
    • CN/m²
    • Dkg/m
    Show answer

    Answer: B

    The SI unit of density is kilogram per cubic metre.

  3. Question 3

    A substance has a mass of 94 g and a volume of 12 cm³. Its density is approximately:

    • A6.83 g/cm³
    • B7.83 g/cm³
    • C7.00 g/cm³
    • D8.50 g/cm³
    Show answer

    Answer: C

    Density = 94/12 ≈ 7.83 g/cm³.

  4. Question 4

    The density of milk is 0.9 × 10³ kg/m³. What is the mass of 5 litres of milk?

    • A0.45 kg
    • B45 kg
    • C4.0 kg
    • D4.5 kg
    Show answer

    Answer: D

    5 L = 0.005 m³. Mass = density × volume = 900 × 0.005 = 4.5 kg.

  5. Question 5

    A solid has a mass of 60 g. When immersed in water, the water level rises from 40 cm³ to 44 cm³. Its density is:

    • A15 g/cm³
    • B4 g/cm³
    • C12 g/cm³
    • D60 g/cm³
    Show answer

    Answer: A

    Volume = 44 − 40 = 4 cm³. Density = 60/4 = 15 g/cm³.

More tests in Mechanical Properties of Matter

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