Anomalous Expansion of Water

Q.

Between 0 and 4 degree Celsius

1. the density of water increases with temperature

2. the density of water becomes zero

3. the density of water decreases with temperature

4. the density of water remains constant with increase in temperature

Q.

A glass bottle completely filled with water and closed tightly at room temperature is likely to burst when kept in the freezer of the refrigerator.

Q. What happens to the density of water when it is heated above $4°C$?

Q. Rarefaction is the region of density of molecules.

1. low
2. high
3. mean

Q. A beaker is completely filled with water at 4°C. It will overflow if

1. cooled below 4°C.
2. heated above 4°C.
3. both heated above and cooled below 4°C respectively.
4. None of the above

Q.

Which of the following are the consequences of the anomalous expansion of water?

1. Bursting of plant’s capillaries during winter

2. Bursting of water pipe’s during winter

3. It helps in preserving the aquatic life during the very cold weather

4. All the above

Q.

The anamalous expansion of water results in formation of ice at the surface level.

1. False

2. True

Q. Why does a helium balloon expand as it goes up?

1. The pressure inside the balloon increases.
2. The pressure inside the balloon decreases.
3. The atmospheric pressure decreases.
4. The atmospheric pressure increases.

Q. Three blocks $\text{A, B,}$ and $\text{C}$ each of $1\text{kg}$ mass and having relative densities $2.5,5,$and$0.5$ respectively, are completely immersed in a tank of water individually. Find the block that displaces the maximum volume of water. Also, find the volume of water displaced and the buoyant force acting on it.

1. $\text{A}$ displaces $400\text{cc}$, ${\text{F}}_B\approx 40\text{N}$
2. $\text{B}$ displaces $400\text{cc}$, ${\text{F}}_B\approx 20\text{N}$
3. $\text{C}$ displaces $2000\text{cc}$, ${\text{F}}_B\approx 20\text{N}$
4. $\text{A}$ displaces $2000\text{cc}$, ${\text{F}}_B\approx 2\text{N}$

Q. Why does a helium balloon expand as it goes up?

1. The pressure inside the balloon increases.
2. The pressure inside the balloon decreases.
3. The atmospheric pressure decreases.
4. The atmospheric pressure increases.

Q.

The density of water is maximum at $4^{\circ }C$.

1. True

2. False

Q. Explain with a graph, how does density of water varies with temperature. $\left[2\text{Marks}\right]$