Factors Affecting Evaporation

Q. The greater the surface area of the liquid, ___ is the rate of evaporation.

Q.

The room fresheners are based on the property of

1. Melting

2. Vapourisation

3. Diffusion

4. Sublimation

Q.

Explain how the surface area affects the rate of evaporation?

Q. State whether $True$ or $False$.

Q. Evaporation is a surface phenomenon. Explain.

Q.

Komal was sitting in the chemistry lab. She wanted to practically check about evaporation, the concept explained by her teacher in the last class.

So, She took two beakers A and B and poured dimethyl ether in A and ethyl alcohol in B. She left the beakers for evaporation to happen. Which of the beaker will have faster rate of evaporation and why?

1. A, because intermolecular forces of attraction is less.
2. B, because intermolecular forces of attraction is less
3. A, because intermolecular forces of attraction is more
4. B, because intermolecular forces of attraction is more.

Q. Assertion :We are able to sip hot tea faster from a saucer than from a cup. Reason: Saucer is having more surface area than a cup, as we know that evaporation is the surface phenomenon. so, the rate of evaporation will increase with the increase in surface area.

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. Give three reasons to justify that water is a liquid at room temperature.

Q.

How can we increase the rate of evaporation?

Q. The rate of evaporation of a liquid decreases with increasing surface area.

1. True
2. False

Q.

Sarath is sitting in a room where the temperature is constantly ${50}^{\circ }C$.

Komal is sitting in a room where the temperature is constantly ${25}^{\circ }C$.

They both take a glass (same size) of water and put it on a table in their respective rooms.

Let’s say they check it after 5 days.

Whose glass will have higher water level?

1. Sarath
2. \N
3. Komal
4. Both glasses will have same water level.

Q.

what are volatile sovents or volatile liquids?

Q. Explain the process of getting pure salt from impure salt with diagram.

Q.
Chose the correct option where $T_1,T_{2}and{T}_3$ are three different temperatures in case of a liquid.

1. $T_2>T_1>T_3$
2. $T_1>T_2>T_3$
3. $T_3>T_2>T_1$
4. $T_1>T_3>T_2$

Q. The rate of evaporation of a liquid decreases with increasing surface area.

1. True
2. False

Q.

Sarath is sitting in a room where the temperature is constantly ${50}^{\circ }C$.

Komal is sitting in a room where the temperature is constantly ${25}^{\circ }C$.

They both take a glass (same size) of water and put it on a table in their respective rooms.

Let’s say they check it after 5 days.

Whose glass will have higher water level?

1. Sarath
2. Komal
3. Both glasses will have same water level.
4. The water level in both the glasses remain unaltered

Q. Which one of the following is the wrong statement about the liquid?

1. It has intermolecular force of attraction
2. Evaporation of liquids increases with decreases of surface area
3. It resembles a gas near the critical temperature
4. It is an intermediate state between gaseous and solid state

Q. Which of the following statements is correct if the intermolecular forces in liquids $A,B$ and $C$ are in the order $A<B<C$ ?

1. $B$ evaporates more readily than $A$
2. $B$ evaporates less readily than $C$
3. $A$ and $B$ evaporate at the same rate
4. $A$ evaporates more readily than $C$

Q. Hot milk is easier to drink from a bowl than from a glass. Mention the reason.