Advertisements
Advertisements
प्रश्न
How is the impurity of iron present in several substances removed in industries ?
Advertisements
उत्तर
The impurity of iron present in several substances in the industries is removed using electromagnets. Waste materials supplied to the industries contain a number of scrap metals including iron.
Iron objects stick to the electromagnet and are collected at a separate place, leaving behind other objects.
APPEARS IN
संबंधित प्रश्न
Honey is more viscous than water. Can you suggest why?
Which of the following is a mixture ?
Salt, Air, Water, Alum, Sugar
Name a metal which is soft and a non-metal which is hard.
Name one solid, one liquid and one gaseous non-metal.
On the basis of composition of matter, milk is considered to be :
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
Define Sol and give one example.
What is the effect of temperature on the solubility of solids in liquids ?
One of the following liquids will leave behind a residue on heating. This one is :
What is the general name of the process by which tea-leaves are separated from prepared tea ?
Name the process by which common salt is obtained from sea-water.
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
How would you separate iodine from a mixture of iodine and common salt ?
How will you separate a mixture of iron filings and powdered carbon ?
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Stars including Sun are covered in ______.
The physical state of water at 373 K is ______.
Atoms are tiny particles that repel each other when they are squeezed very close.
______ is used for industrial refrigeration and transporting frozen food.
