# NCTB Class 6 Science Chapter 8 Mixture Solution

## NCTB Class 6 Science Chapter 8 Mixture Solution

Bangladesh Board Class 6 Science Solution Chapter 8 Mixture Solution  Exercises Question and Answer by Experienced Teacher.

# NCTB Solution Class 6 Chapter 8 Mixture:

 Board NCTB Bangladesh Board Class 6 Subject Science Chapter Eight Chapter Name Mixture

Exercises:-

Fill in the blanks:-

(1) The solution of water and spirit is ——– solution.

Ans:- Homogenous.

(2) ——- is an universal solvent.

Ans:- Water.

(3) In a solution the quality of solute remains—— and the quantity of solvent remains——.

Ans:- Less, more.

(4) Milk and fog are——.

Ans:- Colloid.

Multiple choice questions:-

(1)Which one is liquid-gas solution?

Ans:- (d) Soft drinks– is liquid- gas solution.

(2) Which one is a colloid?

Ans:- (c) Fat and water– is a colloid.

Answer question no 3 and 4 in the light of citation:-

At room temperature the solubility of sodium carbonate is 21.6.

(3) What amount of sodium carbonate is required to make a saturated solution of sodium carbonate in 200 gm of water?

Ans:- (d) 43.6 gram of sodium carbonate is required to make a saturated solution of sodium carbonate in 200 gm of water.

Solubility of sodium carbonate is 21.6

In 200gm water the required amount is = = 43.2gm

(4)If the quantity of sodium carbonate is 10gram less than the solution is-

Ans: If the quantity of sodium carbonate is 10gram less than the solution is—– (b) Unsaturated solution.

(1) What is called a solution? What is the main difference between solution and mixture?

Ans:-Solution is a special type of mixture where the solute is uniformly distributed in the solvent and one can not be easily separated from another.

The main difference between solution and mixture is in mixture, substances are not uniformly distributed so we can easily separated one from another but in solution. Substances are uniformly distributed and we can not separate one from another.

(2) What dose it mean by solution?

Ans:- The amount of solute required to make a saturated solution of that solute at a particular temperature by a solvent of 100gram is called the solubility of that solvent.

(3) What dose ‘Liquid-gas solution’ mean? Explain with examples.

Ans:- The solution in which the liquid is used as a solvent and solute is a gaseous substance is called liquid-gas solution.

Example:- Soft drinks.

(4) What is called suspension?

Ans:- Suspension is such a mixture, in which the components are partially separated after keeping it at rest.

(5) Are the colloid and suspension same? Give reasons in favour of your answer.

Ans:- No, the colloid and suspension are not same, In size, suspension is large than colloid. In case of suspension, after keeping is for long time the particles will never gather as sediment.

Creative question:-

#### (1) Priyonti and Ruponti were enjoying when they got down to the sea water at Cox’s Bazar. Suddenly the water of sea entered into the mouth of ruonti and she observed that the water has salinity. The cause of this was asked to prionti and she answered that it is a solution of water and salt. Salt is made from it. Ruponti was astonished and wanted to know more about the matter. Coming back to their house Priyonti showed ruopnti  how to make salt from saline water.

(a) What is mixture?

(b) Why is water called universal solvent?

(c) Show by drawing a schematic diagram the process of the components showed by Priyonti to Ruponti.

(d) Analyse that both the components of the solution is possible to obtain again.

(a) Ans:- Whatever we prepare by mixing more than one different substances or items are called mixture.

(b) Ans:- Water is a universal solvent because it can dissolve innumerable inorganic substance, many organic substances, many organic substances and gaseous substances too.

(c) Ans:- The schematic diagram of the production process of the components showed by priyonti and ruponti:

(d) Ans:- Both the components of the solution is possible to obtain again . We can obtain salt from the distillation process.

Updated: October 31, 2020 — 7:37 am