Advertisements
Advertisements
Question
Name the process by which the various gases of the air are separated.
Advertisements
Solution
Various gases of air are separated by fractional distillation.
APPEARS IN
RELATED QUESTIONS
Name a liquid which can be classified as a pure substance and conducts electricity.
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Give reason why graphite is used for making elecrode in a dry cell.
Draw a flow-chart for the schematic representation of different types of matter.
Which of the following is not an element ?
Which of the two will scatter light : soap solution or sugar solution ? Why ?
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
How will you differentiate between a suspension and a colloid ?
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
What type of magnet is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
The material which is added to water during purification process at the water works so as to disinfect it is :
Name one pair of liquids which can be separated by using a separating funnel.
______ is a smallest particle.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Gases change to liquid by the process of ______.
Give an example of a molecule.
Give an example of liquid in gas.
