Physical Properties of Water

Q.

In summer season, after rain why is it the heat so unbearable?

Q.

Difference between expansion and contraction.

Q.

Differentiate between fusion and solidification.

Q. Question 18
Water as ice has cooling effect, whereas water as steam may cause severe burns. Explaining these observations.

Q. What are the different states of matter in which water exists? Discuss.

Q.

The properties of water are different from the properties of the elements of which it is formed. Discuss.

Q.

(a) Why does temperature in Mumbai and Chennai not fall as low as it does in Delhi?

(b) Give the properties of water responsible for controlling the temperature of our body.

Q.

I heard that the boiling point of liquid oxygen is -183 degree celsius what does the minus sign indicate here

Q.

The process during which a liquid changes to its solid state is known as __________ or ___________.

Q.

The density of a liquid _______ when it is heated.

Q.

The phase transition in which a liquid turns into a solid, when its temperature is lowered below its freezing point, is called as _________.

1. Solidification

2. Melting

3. Sublimation

4. Evaporation

Q.

The density of liquids and gases change with temperature because there is a change in their mass.

1. True
2. False

Q. If you dropped a piece of ice at 0°C into water at 0°C, what would happen to ice?
Assume the system is isolated.

Q.

Natural phenomenon like fog, mist or frost are caused due to __________

1. Evaporation

2. Transpiration

3. Condensation

4. Freezing

Q.

Why is ice at 273 Kelvin more effective in cooling than water at the same temperature?

Q. Which of the following property does not describe a compound?

1. It is a pure substance.
2. It is composed of two or more elements.
3. Constituent atoms are mixed in any proportion by mass.
4. It has different properties as compared to its constituents.

Q.

How do you confirm that a colourless liquid given to you is pure water

Q. Arrange the following in the correct order of increasing density.

1. Oil
2. Air
3. Brick
4. Water

Q.

Two objects of the same size but made up of different materials will weigh different.

1. True
2. False

Q. Melting point of ice on the celsius scale is 0 degree celcious. Express the temperature on the kelvin scale?

Q. Which of the following states of matter has most number of particles per unit area?

1. Liquids
2. Gases
3. Solids
4. All of the above

Q. The properties of a compound are the same as that of its constituent elements.

1. True
2. False

Q. Assertion :Properties of a compound are entirely different from the properties of the elements it is made up of. Reason: Chemical compound is water, a liquid that is nonflammable and does not support combustion. It is composed of two elements: hydrogen, an extremely flammable gas, and oxygen, a gas that supports combustion.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q.

When ice is changed into water, heat is released.

1. True
2. False

Q.

Which of the following is not a physical property of water?

1. It is a colourless liquid

2. Water contract when cooled upto $4^{0}C$

3. The specific heat capacity of water is $1calorie/\left(gra{m}^{0}C\right)$

4. On increasing pressure the freezing point of water increases

Q.

Choose the correct statement regarding the conversion of ice into water.

1. Ice converts into water by releasing heat.

2. It is not possible to convert ice into water.

3. Ice converts into water by absorbing heat.

4. Ice neither absorbs nor releases heat while converting into water.

Q.

Condensation occurs at a fixed temperature whereas melting occurs over a range of temperature

Q.

Water exists in all three states. Discuss.

Q.

Which of the following is not a physical property of water?

1. It is a colourless liquid

2. Water contract when cooled upto 4^oC

3. The specific heat capacity of water is 1 calorie/(gram^oC)

4. On increasing pressure the freezing point of water decreases

Q. Elements react to form new compounds and the composition of new substance in the compound is :

1. variable
2. Can't say
3. depends on number of neutron
4. fixed