Question # 1

The energy store in an atom or molecule due to intermolecular force is:

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Kinetic energy

Potential energy

Internal energy

G.P.E

The slope of distance time graph shows.

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Speed

Displacement

Acceleration

Distance

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

Length of a rod is L∘ on temperature T∘. After heating upto temperature T, its length L becomes

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L = L∘ (1 + αΔT)

L = L∘ (1 + ΔT)

L = L∘ (1 - αΔT)

L = L∘ (1 -ΔT)

Water freezes at

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0oF

32oF

273 K

0 K

Larger number of slots are made in radiators to increase:

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Surface temperature

Surface area

Both A and B

Nonr

A satellite revolving around very close to Earth has speed nearly:

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8 kms^-1

5 kms^-1

10 kms^-1

100 kms^-1

Mercury is used as thermometric material because it has

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Uniform thermal expansion

Low freezing point

Small heat capacity

All the above properties

Steam is used to run machine because of high amount of ___________ heat.

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Latent

Great

Large

Nil

The smallest division taht can be taken by a meter rule is.

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1 cm

1 mm

1 dm

1 km

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

Latent heat of fusion of water is:

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3.36 x 10¹⁰ Jkg^-1

93.6 x 10¹⁰Jkg^-1

3.36 x 10⁵Jkg^-1

None of these

Two forces of 2N and 4N are acting in opposite directions, Their resultant force will be

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2 N

4 N

6 N

8 N

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