Advertisements
Advertisements
प्रश्न
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
उत्तर १
- Ice
- Iron
- Hydrochloric acid
- Calcium oxide
- Mercury
उत्तर २
- 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
संबंधित प्रश्न
Fill in the blank :
The substances which can flow are called ________
Name a liquid which can be classified as a pure substance and conducts electricity.
Draw a flow-chart for the schematic representation of different types of matter.
State whether colloidal solutions are homogeneous or heterogeneous.
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
What is the difference between solutions and colloids ?
One of the following liquids will leave behind a residue on heating. This one is :
Name the process you would use to separate a mixture of water and alcohol.
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..............
One of the following does not undergo sublimation. This one is :
Name one pair of liquids which can be separated by using a separating funnel.
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
Matter is made up of ______.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
______ is used for industrial refrigeration and transporting frozen food.
Give an example of a molecule.
Define the term matter.
