Advertisements
Advertisements
Question
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................
Advertisements
Solution
The separation of liquids by fractional distillation is based on the difference in their boiling points.
APPEARS IN
RELATED QUESTIONS
Name the terms for the change of a solid into liquid.
State two characteristics of matter demonstrated by Brownian motion.
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
Define matter. Give four examples of matter.
Name a non-metal which is a good conductor of electricity.
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.
Give reason why graphite is used for making elecrode in a dry cell.
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
Which one of the following scrap metal cannot be separated by magnetic separation ?
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
Name the metals that are used in jewellery.
Diffentiate between absorption and adsorption.
A standard sheet of paper is about ______ of atoms thick
The movement of particles in liquids is ______.
