Tag: process of separating components of a mixture

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Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

In which of the following mixtures hand picking method can be best used?

  1. The mixture of gas and liquid.

  2. The mixture of liquid and liquid.

  3. The mixture of solid and liquid.

  4. The mixture of solid and solid.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hand picking is a method of separation used where one of the component is in small quantity. And it is best for mixture of solids, for eg- Stone in rice.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

What are the advantages of handpicking methods?

  1. The materials which are very small can be removed by handpicking method.

  2. The materials which can not removed by machines, can be easily removed by handpicking.

  3. This method take less time for less quantity of substance.

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Advantages of Handpicking Method:-

$\longrightarrow$ Useful and also less time consuming for separating small quantity of mixture.
$\longrightarrow$ This method does not need any special machine.
$\longrightarrow$ Efficiency of using this method is higher than others.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

How can husk particles be separated from pulses?

  1. By hand picking

  2. By winnowing

  3. By churning

  4. By hydraulic washing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Winnowing- Winnowing is a method of separation of chaff or husk from wheat/grains. Also called process of separation of heavier components from lighter components by the application of wind.

Hold the container of pulses in the direction of the wind and then shake, pulses being heavier will fall straight down and husks being lighter will fall away due to the wind.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

The freezing point of pure water is ____________.

  1. 100 degree centigrade

  2. 50 degree centigrade

  3. 20 degree centigrade

  4. zero degree centigrade
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Freezing point is the temperature where a liquid converts into solid. Water converts into ice at zero degrees centigrade. So degree zero centigrade is the freezing point of water. Hence option $D$ is correct.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Sieving is the method used to saperate the particles of

  1. same size

  2. different size

  3. same color

  4. different colour
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If the size of particle it too small to be picked by hand,sieving is used for separating substances. A sieve; having pores of certain  size is used. The bigger particles are retained by the sieve whereas the smaller particle are passed  through it. For example; this method is used for separating bran from flour, sand from gravel, pearls of different sizes,etc.

Multiple choice chemistry mix and separate dry methods of separation process of separating components of a mixture method of separation

Winnowing is the process used to separate particles of ____________.

  1. heavier and lighter weight

  2. only two heavier particles

  3. only two lighter paticles

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The process of separation of lighter particles from heavier particles; with the help of wind; is called winnowing. This method is used for separating grains from husk.
Hence option A is correct.