Advertisements
Advertisements
प्रश्न
Name the process by which the various gases of the air are separated.
Advertisements
उत्तर
Various gases of air are separated by fractional distillation.
APPEARS IN
संबंधित प्रश्न
The molecules can move freely anywhere in
Name the processes involved in two cases.
Name the terms for the particles of matter which may or may not have independent existence.
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Explain why air is used to inflate tyres.
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Give reason why graphite is used for making elecrode in a dry cell.
Which of the following are compounds ?
- CO
- No
- NO
- Co
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
Define Foam Give one example.
Which of the following represents the solubility of sugar in water at 20°C ?
Which one of the following is not a chemical change ?
Name the process which is used in milk dairies to separate cream from milk.
Name the process you would use to separate a mixture of water and alcohol.
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
One of the following does not undergo sublimation. This one is :
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
Define the term matter.
Higher the temperature, the higher the kinetic energy of particles.
