Advertisements
Advertisements
Question
How is scrap iron separated from a heap of waste materials in factories?
Advertisements
Solution
Scrap iron is separated from a heap of waste materials in factories by using large electromagnets fitted to a crane. The electromagnet fitted crane is moved up and away from the waste to drop these scrap iron objects at a separate place. Electromagnets are used for this purpose because one can switch on and off the supply of magnetism during the process of lifting and dropping of the iron pieces.
APPEARS IN
RELATED QUESTIONS
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
Name a metal which can be easily cut with a knife.
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
Which of the two will scatter light : soap solution or sugar solution ? Why ?
What is the most common way of expressing the concentration of a solution ?
A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.
In what respects does a true solution differ from a colloidal solution ?
Define Foam Give one example.
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
What difference in the properties of oil and water enable their separation by a separating funnel ?
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
______ is not made of matter.
Matter is made up of ______.
Evaporation does form bubbles.
Examples of foam are ______.
Define the term matter.
