Types of Mixtures Based on Composition

Q.

Which of the following is not a mixture?

1. air

2. seawater

3. pure water

4. soil

Q. Arrange the steps involved in obtaining oxygen gas from air.
1. Liquify air by increasing the pressure and decreasing the temperature.
2. Collect the liquid oxygen in a jar.
3. $C{O}_2$ separates out as dry ice.
4. Separate nitrogen gas through a fractionating column.

1. $1\to 3\to 2\to 4$
2. $2\to 4\to 1\to 3$
3. $4\to 1\to 3\to 2$
4. $1\to 3\to 4\to 2$

Q.

Clean air is a _________ mixture.

Q. Mention three points to justify that air is a mixture and not a compound.

Q. Statement (S): Steel is an example of a homogeneous mixture.
Reason (R): The components of a homogeneous mixture are uniformly distributed and are indistinguishable.
Which of the following holds true?

1. Only Statement (S) is true but the Reason (R) is false.
2. Only Reason (R) is true but the Statement (S) is false.
3. Both Statement (S) and the Reason (R) are correct and the Reason (R) is the correct explanation of the Statement (S).
4. Both Statement (S) and the Reason (R) are correct but the Reason (R) is not the correct explanation of the Statement (S).

Q. Which of the following contains gas as solute and liquid as solvent?

1. Air
2. Lemonade
3. Soda water
4. Sugar solution

Q.

Classify the following as homogeneous and heterogeneous mixture:

sand-sugar

Q.

Classify the following as homogeneous and heterogeneous mixture:

blood

Q.

Why air is considered as a mixture and not a compound?

Q.

Define mixture. Why air is a mixture not a compound? Give four reasons. [5 MARKS]

Q. Match the following:
$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{a)}& \text{Tyndall effect}& \text{i)}& \text{Mercury}\\ \text{b)}& \text{Suspension}& \text{ii)}& \text{Silicon}\\ \text{c)}& \text{Liquid Metal}& \text{iii)}& \text{Starch solution}\\ \text{d)}& \text{Metalloid}& \text{iv)}& \text{Muddy water}\end{array}$

1. a(ii), b(iv), c(iii), d(i)
2. a(iii), b(iv), c(i), d(ii)
3. a(i), b(ii), c(iii), d(iv)
4. a(iv), b(iii), c(i), d(ii)

Q. Arrange the steps involved in obtaining oxygen gas from air.
1. Liquify air by increasing the pressure and decreasing the temperature.
2. Collect the liquid oxygen in a jar.
3. $C{O}_2$ separates out as dry ice.
4. Separate nitrogen gas through a fractionating column.

1. $1\to 3\to 2\to 4$
2. $2\to 4\to 1\to 3$
3. $4\to 1\to 3\to 2$
4. $1\to 3\to 4\to 2$

Q.

Air is a mixture, but not a compound.

1. True

2. False

Q. is a homogeneous mixture.

1. Cookie
2. Iron
3. Brass
4. Pizza

Q.

Classify solutions based on the type of solvent.

Q. Arrange the steps involved in obtaining oxygen gas from air.
1. Liquify air by increasing the pressure and decreasing the temperature.
2. Collect the liquid oxygen in a jar.
3. $C{O}_2$ separates out as dry ice.
4. Separate nitrogen gas through a fractionating column.

1. $1\to 3\to 2\to 4$
2. $2\to 4\to 1\to 3$
3. $4\to 1\to 3\to 2$
4. $1\to 3\to 4\to 2$

Q. A mixture of salt and oil is a homogeneous mixture.

1. True
2. False

Q. A mixture of salt and oil is a homogeneous mixture.

1. True
2. False

Q.

Air is a mixture, but not a compound.

1. False

2. True

Q.

Air is a mixture, but not a compound.

1. False

2. True

Q. is a homogeneous mixture.

1. Cookie
2. Iron
3. Brass
4. Pizza

Q.

What are mixtures? Describe the types of mixtures with examples.