Physics GK 12 - Density

1. Which of the following represents the Density of a material?
[A] Mass/weight
[B] Mass/Length
[C] Mass/Volume
[D] Mass/Area

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2. Which of the following is the S.I. unit of density?
[A] m-2
[B] m-3
[C] kg m-2
[D] kg m-3

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3. What is Specific Gravity of a liquid?
[A] ratio of the density of a liquid to the density of water
[B] product of the density of a substance to the density of water
[C] ratio of the density of water to the density of a liquid
[D] ratio of density of the liquid to the mass of the equal density of water

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4. What is the unit of Specific gravity?
[A] kg m-3
[B] kg m-2
[C] kg m-1
[D] No units

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5. What is the density of water at 4°?
[A] 1.0
[B] 1.0 × 102 kg m–3
[C] 1.0 × 103 kg m–3
[D] 10 kg m–3

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6. What is the density of whole blood at STP?
[A] 3.57 × 103 kg m–3
[B] 1.06 × 103 kg m–3
[C] 5.55 × 103 kg m–3
[D] 2

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7. Which of the following instruments is used to measure the relative density of a liquid?
[A] Hydrometer
[B] Hygrometer
[C] Lactometer
[D] Gravitimeter

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8. Which of these instruments is used for testing the purity of milk?
[A] Hydrometer
[B] Lactometer
[C] Galvanometer
[D] Ammeter

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9. Which of the following is correct about the density of sea water?
[A] it is more than fresh water
[B] it is less than fresh water
[C] it is equal to the density of fresh water
[D] None of the above

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10. What is the density of air at room temperature?
[A] 1.41
[B] 1.75
[C] 1.29
[D] 1.9

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