Advertisements
Advertisements
Question
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Advertisements
Solution 1
- Ice
- Iron
- Hydrochloric acid
- Calcium oxide
- Mercury
Solution 2
- Ice, iron, calcium oxide, and mercury are pure substances because they consist of only one type of matter.
- Milk, hydrochloric acid (hydrogen chloride gas dissolved in water), brick and air are not pure substances because they contain particles of more than one type of matter.
APPEARS IN
RELATED QUESTIONS
Define matter. Give four examples of matter.
What is meant by saying that metals are malleable and ductile ?
What are the two types of pure substances? Give one example of each type.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
Which one of the following is not a metalloid ?
Which of the two will scatter light : soap solution or sugar solution ? Why ?
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
What is the difference between solutions and colloids ?
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
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.
Which of the following can be called a suspension ?
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.
Pure copper sulphate can be obtained from an impure sample by the process of :
The material which is added to water during purification process at the water works so as to disinfect it is :
Which one of the following scrap metal cannot be separated by magnetic separation ?
Rusting of an article made up of iron is called
Liquids cannot be compressed and they have fixed volume.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
Define the term matter.
