Chemistry (Science) Matter in our surroundings Chapter MCQs with Solutions and Answers for CBSE Class 9.
Introduction of Matter is our Surroundings
There are a large number of things around us which we see and feel. The nature and behaviour of different types of substances around us are different. These substances differ in their shape, size, colour, smell, texture, etc.
Since ancient times, human beings have been eager to understand surroundings. According to ancient Indian philosophers, all matter whether living or non-living is made up of five basic constituents commonly called panch tatvas, i.e., air, earth, fire, sky and water. A similar classification of matter was also evolved by ancient Greek philosophers.
However, scientists have classified matter into the following two types on the basis of their properties.
- Physical classification : On the basis of physical properties, matter has been classified as solids, liquids and gases.
- Chemical classification : On the basis of chemical properties, matter has been classified as elements, compounds and mixtures.
Multiple Choice Questions with Solutions
1. The quantity of matter present in an object is called its :
(A) Weight
(B) Gram
(C) Mass
(D) Density
Solution
Sol. Mass depends on quantity of matter.
2. Which of the following is not a physical change?
(A) Sublimation of camphor
(B) Rusting of Iron
(C) Breaking of a glass tumbler
(D) All of the above
Solution
Sol. Rusting of iron is a chemical change.
3. Out of following, which is not defined as a matter :
(A) Food
(B) Pain
(C) Book
(D) Desk
Solution
Sol. “Pain” is not defined as matter because it does not contain mass and volume.
4. According to Greek philosopher, which element is not a basic element of all matters :
(A) Happiness
(B) Air
(C) Fire
(D) Earth
Solution
Sol. ”Happiness” is not basic element of matter.
5. The liquid metal among the following is :
(A) Gallium
(B) Mercury
(C) Both A and B
(D) Berylium
Solution
Sol. Ga and Hg both are liquid metal.
6. Which is not a chemical change :
(A) Digestion of food
(B) Melting of ice
(C) Rusting of iron
(D) Burning of candle wax
Solution
Sol. Melting of ice is a physical change.
7. The ‘panch tatva’ comprise of sky, earth, air, water and ___________ :
(A) Mercury
(B) Carbon
(C) Fire
(D) None of these
Solution
Sol. ‘Panch tatva’ – sky, earth, air, water and fire.
8. A substance is a form of matter that has a _______________composition :
(A) Definite
(B) Uniform
(C) Nonuniform
(D) Mixed
Solution
Sol. Substance is form of matter that has a definite composition.
9. Which of the following matter falls in the category of a “substance” :
(A) Ice
(B) Milk
(C) Wood
(D) Brick
Solution
Sol. Ice contain same type of molecular that’s why it is said to be substance.
10. The chemical formula of crystals of copper sulphate is :
(A) CuSO4.5H2O
(B) Cu2SO4.5H2O
(C) CuSO4
(D) Cu2SO4
Solution
Sol. Crystal of copper sulphate → CuSO4 × 5H2O