Saturday, June 6, 2015

CBSE Class 7 - Science - CH6 - Physical and Chemical Changes (MCQs)

Physical and Chemical Changes

MCQs
CBSE Class 7 - Science - CH6 - Physical and Chemical Changes (MCQs)
Is burning a match stick
physical change or chemical?


Q1: 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.

Q2: 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

Q3: Which of the following is NOT a physical property of a substance?

(a) shape
(b) color
(c) density
(d) flammability

Q4: 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.

Q5: Turning milk into curd is a

(a) physical change
(b) physical property
(c) chemical change
(d) chemical property

Q6: 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

Q7: Formation of gas bubbles is _________.

(a) a physical change
(b) a physical property
(c) a chemical change
(d) a chemical prpoerty

Q8: 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 peoprty
(d) chemical prpoerty

Q9: The process of obtaining Salt by the evaporation of sea water is known as ____________.

(a) Crystallisation
(b) Sublimation
(c) Galvanisation
(d) Amalgamation

Q10: When carbon dioxide gas is passed through lime water, it turns lime water into ________

(a) milky
(b) blue
(c) silver
(d) golden

Answers:
1: (b) Heating of Iron
2: (c) Cooking a vegetable
3: (d) flammability
4: (d) Converting liquid into gas.
5: (c) chemical change
6: (a) It corrodes with air
7: (c) a chemical change
8: (d) chemical property
9: (a) Crystallisation
10:(a) milky

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