Anomalous Expansion of Water

Q.

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

Q.

In cold countries, water pipes sometimes burst, because of _____

1. Pipe contracts
2. Water expands on freezing
3. When water freezes, pressure increases
4. When water freezes, it takes heat from pipes

Q.

How does anomolous expansion of water help the aquatic organisms in cold climates ?

Q.

What happens when oil is mixed with water at higher temperature

Q.

Give reasons :

(a)Alcohol is mixed with water and is used in car radiators.

(b) Icebergs float on ocean water.

(c) Carbonated drinks are bottled under high pressure.

Q. The temperature range in which water shows anomalous behaviour is:

1. 1 to 4 degree celsius
2. 0 to 4 degree celsius
3. -1 to -4 degree celsius
4. 0 to -4 degree celsius

Q.

Water expands below ___ and contracts above ___.

1. $4^{\circ }C,0^{\circ }C$

2. $4^{\circ }C,{10}^{\circ }C$

3. ${24}^{\circ }C,0^{\circ }C$

4. ${24}^{\circ }C,{10}^{\circ }C$

Q. Water _____ on freezing.

1. expands
2. condenses
3. flows
4. contracts

Q.

At room temperature, $H_{2}O$ exists as ___.

1. Liquid

2. Gas

3. Solid

4. Plasma

Q.

Water has maximum density at ____

1. 0°C

2. 4°C

3. 32°F

4. - 4°C

Q.

The anomalous expansion of water is a boon to which of the given habitats in cold regions?

1. Terrestrial habitat

2. Aquatic habitat

3. Grassland habitat

4. Mountain habitat

Q. As per Lenovo Alexa the boiling point of hydrogen is 20.3K but in the school textbook it is written 20.4K .
Which one is correct?

Q. The point at which water will have the highest density is:

1. P
2. Q
3. R
4. S

Q. Write true or false for each statement
The density of water is maximum at $4^{\circ }C$.

1. True
2. False

Q.

What is the maximum weight which a floating body may have?

Q.

What is the physical state of water at 0^oC

Q.

what is bar in the Al2O3 and NaOH reaction?

Q. Rusting on iron needs

1. dry air
2. air and water
3. distilled water and carbon dioxide
4. oxygen and carbon dioxide

Q. Maximum density of $H_{2}O$is at the temperature

1. ${32}^{o}F$
2. ${39.2}^{o}F$
3. ${42}^{o}F$
4. $4^{o}F$