Answers for Science Quiz based on NCERT


1: Which of the following is a physical change?
A. Rusting of Iron
B. Heating of Iron
C. Burning of Wood
D. Ripening of a fruit.

1: (b)



2: Which of the following is a chemical change?
A. Boiling of Water
B. Tearing of Newspaper
C. Cooking a vegetable
D. Freezing water into ice


2: (c)

3: Which of the following is NOT a physical property of a substance?

A. shape
B. color
C. density
D. flammability

3: (d)


4: Which of the following MIGHT NOT tell a chemical change has taken place?
A. Evolution of gas.
B. Light is generated
C. Production of heat
D. Converting liquid into gas.

4: (d)


5: Turning milk into curd is a
A. physical change
B. physical property
C. chemical change
D. chemical property

5: (c)


6: Which of the following is a chemical property of Aluminium?
A. It corrodes with air
B. It is soft and malleable
C. It melts at 660°C
D. Its density is 2.70 g/cm3

6: (a)


7: Formation of gas bubbles is _________.
A. a physical change
B. a physical property
C. a chemical change
D. a chemical property

7: (c)


8: Any characteristic that gives a sample of matter the ability/inability to undergo a change that alters its composition. It is called ______.
A. physical change
B. chemical change
C. physical property
D. chemical property

8: (d)


9: The process of obtaining Salt by the evaporation of sea water is known as ____________.
A. Crystallisation
B. Sublimation
C. Galvanisation
D. Amalgamation

9: (a)


10: When carbon dioxide gas is passed through lime water, it turns lime water into ________
A. milky
B. blue
C. silver
D. golden

10: (a)

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