Separation of Components of Mixture

Q.

A _______ method is used for separating a mixture of two solids, if their solubilities in a particular solvent differ widely.

1. fractional crystallisation

2. distillation

3. gravitation

4. solvent extraction

Q. is used to separate heavier components of a mixture from the lighter components with the help of wind.

1. Threshing
2. Winnowing
3. Sieving

Q. A solution contains sugar dissolved in $150g$ of water. If mass of the solution is $200g$, calculate the concentration in terms of mass by mass percentage of the solution.

1. $10\%$
2. $25\%$
3. $50\%$
4. $75\%$

Q.

Draw a labelled diagram of the following.

Separation of kerosene from water using a separating funnel

Q.

How filter paper is made into filter paper cone?

Q.

How will you separate the components of a black ink?

Q.

The process of coagulation or loading can improve the effectiveness of sedimentation.

1. True
2. False

Q.

Find out the mass of a solvent present in 500g of 30% sodium chloride solution.

Q.

Pure copper sulphate can be obtained from its impure sample by the process of

1. Filtration

2. Evaporation

3. Crystallisation

4. Fractional distillation

Q. If I have provided with a mixture of naphthalene and ammonium chloride. suggest an activity to separate them with well labelled diagram

Q. What is the correct order of the procedures to be used to separate a mixture of sand, iron filling, ammonium chloride, and sodium chloride ?​

1. Filtration → Crystallisation → Sublimation → Magnetic separation​
2. Crystallisation → Filtration → Sublimation → Magnetic separation​
3. Crystallisation → Filtration → Magnetic separation → Sublimation​
4. Magnetic separation → Sublimation → Filtration → Crystallisation​

Q. Which of the following techniques is considered better than simple evaporation for separation of a solid from liquid?​ ​

1. Crystallisation
2. Fractional distillation​
3. Simple distillation​
4. Centrifugation​

Q.

The process of coagulation or loading can improve the effectiveness of sedimentation.

1. True
2. False

Q. In chromatography technique, the component that travels the least on paper has:

1. least solubility in water
2. highest solubility in water
3. highest attraction towards water
4. no attraction towards paper
   

Q. Filter paper is helpful in separating insoluble particles from a liquid.

1. solid
2. liquid
3. gas

Q. A child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in the figure. The filter paper was removed when the water moved near the top of the filter paper.
(a) What would you expect to see, if the ink contains three different coloured components?
(b) Name the technique used by the child.
(c) Suggest one more application of this technique.

Q. Which among the following methods can be used to separate heterogeneous mixtures into their respective constituents?

1. Handpicking
2. Filtration
3. Sieving
4. Distillation

Q. is a process in which insoluble solid particles present in the liquid settle down at the bottom.

1. Decantation
2. Sedimentation
3. Threshing
4. Winnowing

Q. Which amongst the following can be separated by handpicking?

1. Potato and tomato
2. Salt and sand
3. Rotten and fresh fruits
4. Oranges and apples

Q. In a separating funnel, the immiscible liquids separate out in layers depending on their densities.

1. True
2. False