Match the statements in Column A with those in Column B. Column A Column B 1. A mixture of water vapor, dust particles and air on high altitude. (a) Drought 2. Journey of water from ocean to land and back to the ocean (b) Water harvesting 3. Collection of rooftop rainwater. (c) Cloud 4. A situation caused by no rain for a year. (d) Water cycle

A mixture of water vapor, dust particles and air on high altitude is known as cloud. The drops of water fall from the clouds towards the ground is called rain. The journey of water from ocean to land and back to the ocean is known as water cycle. It is powered by the heat of the sun and the force of gravity. The collection of rooftop rainwater for future use is known as water harvesting. It is a method of conservation of water. A situation caused by no rain for a year is known as drought. It results in loss of human life as well as of animal and plant life. The correct matches can be given as, Column A Column B 1.A mixture of water vapor, dust particles and air on high altitude. (c) Cloud 2.Journey of water from ocean to land and back to the ocean (d) Water cycle 3. Collection of rooftop rainwater. (b) Water harvesting 4.A situation caused by no rain for a year. (a) Drought

EASY

Earn 100

What are the factors affecting on boiling point?

Important Questions on Thermal Properties of Matter

EASY

Physics>Heat and Thermodynamics>Thermal Properties of Matter>Latent Heat

Two systems are in thermal equilibrium. The quantity which is common for them is

EASY

Physics>Heat and Thermodynamics>Thermal Properties of Matter>Latent Heat

Latent heat of vaporisation of water is

22.6 \times 10^{5} J {kg}^{- 1}

. The amount of heat needed to convert

100 kg

of water into vapour at

100 ° C

HARD

Physics>Heat and Thermodynamics>Thermal Properties of Matter>Latent Heat

10 H

inductor carries a current of

20 A

. If the energy stored in this inductor melts ice at

0 ° C,

then the mass of the ice melted is

[

Latent heat of ice

= 2.26 \times 10^{3} J {kg}^{- 1}]

MEDIUM

Physics>Heat and Thermodynamics>Thermal Properties of Matter>Latent Heat

1 kg

of water, at

20 ° C

is heated in an electric kettle whose heating element has a mean (temperature averaged) resistance of

20 Ω .

The rms voltage in the mains is

200 V

. Ignoring heat loss from the kettle, time taken for water to evaporate fully is close to
[ Specific heat of water

= 4200 J {kg}^{- 1} ° C^{- 1}

Latent heat of water

= 2260 k J k g^{- 1}

]

HARD

Physics>Heat and Thermodynamics>Thermal Properties of Matter>Latent Heat

A thermally insulated cubical box of side length $20 cm$ and wall thickness $2 cm$ containing $2 kg$ of ice is closed on all sides. The mass of ice melted in $10$ hours is (Thermal conductivity of the material of the box $= 0.01 {Wm}^{- 1} K^{- 1},$ latent heat of ice $= 360 \times 10^{3} J {kg}^{- 1}$ and ambient temperature $= 40 ° C$ )

EASY

Physics>Heat and Thermodynamics>Thermal Properties of Matter>Latent Heat

A piece of ice falls from a height

h

so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of

h

is:
(Latent heat of ice is

3.4 \times 10^{5} {J kg}^{- 1}

and

g = 10 {N kg}^{- 1}

)

MEDIUM

Physics>Heat and Thermodynamics>Thermal Properties of Matter>Latent Heat

The statements given below is incorrect. Write the correct statement.

Clouds are formed when condensation of water vapour takes place on ice particles.

MEDIUM

Physics>Heat and Thermodynamics>Thermal Properties of Matter>Latent Heat

Match the statements in Column A with those in Column B.

Column A	Column B
1. A mixture of water vapor, dust particles and air on high altitude.	(a) Drought
2. Journey of water from ocean to land and back to the ocean	(b) Water harvesting
3. Collection of rooftop rainwater.	(c) Cloud
4. A situation caused by no rain for a year.	(d) Water cycle