Question # 1

Alcohol has specific heat in Jkg^-1 K^-1 is:

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2500

4200

1000

138.6

Gallium (element) melts at:

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40 °C

30 °C

80 °C

90 °C

Normal human body temperature is :

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15°C

98.6°C

37°C

37°F

The freezing point of Mercury is:

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49 ^oC

-49^oC

39^oC

-39^oC

Density of water is:

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100 kgm^-3

1000 kgm^-3

10 kgm^-3

1 kgm^-3

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

The specific heat of glass is:

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501.72

500

501

502

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

The unit of heat capacity is:

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Jkg k

JK^-1

Jkg^-1K

J^-1kg^-1K^-1

Which gas is replaced by Ammonia in refrigerators?

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Nitrogen

Carbon di oxide

Methane

Freon gas

Evaporation takes place at temperature :

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100°C only

0°C only

35°C Only

At all temperature

Ice at ............ °C is more effective in cooling.

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0

-1

-2

-3

The value of latent heat of vaporization of water is:

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2.26 x 10⁶ Jkg^-1

2.29 x 10⁵Jkg^-1

2.26 x 10^-6Jkg^-1

3.29 x 10^-5Jkg^-1

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