Question

VERY SHORT ANSWER QUESTIONS
1.What difference in the property of two miscible liquids enables their separation by fractional distillation?
2.Why is solution not heated to dryness to get crystals?
3.Give one example each of homogeneous and heterogeneous mixture.
4.Name the apparatus by which mixture of oil and water can be separated.
5.How can we check whether the given soli substance is pure or not?
6.A hard substance produces a tinkling sound when beat. Is it metal or a non- metal? 7.Is brass a mixture or a compound?

8.What type of solution is an alloy? Liquid solution or solid solution
9.A mixture consisting of two miscible liquids 'A' and 'B' whose boiling points differ by 50 C can be separated by which process?
10.Which separation, technique is employed to separate complex mixture of organic compounds like carbohydrates, amino acids. Vitamins, hormones, etc?
11.In fractional crystallization two organic compounds gets differentiated on the basis of which property.
12.Which method can be used to separate mixture of iron filings and common salt? 13.Give one example of solid- liquid homogeneous mixture.
14.What is a aquaregia?
15.Which method is used to separate two immiscible liquids?
16.Name two elements which are in liquid state at room temperature?

Answer 1

Answer:

1answer. The property that enables the separation of two miscible liquids by fractional distillation is the difference in their boiling points.

2answer. Heating the solution to dryness will not remove soluble impurities and crystals of very poor quality are obtained.