Class Notes NCERT Solutions for CBSE Students
NCERT 6th Class (CBSE) Science: Changes Around Us – Quiz
18 Multiple Choice Questions related to NCERT 6th Class (CBSE) Science: Changes Around Us – Quiz:
- Growth is a life process that take due to so many chemical changes that take place in the cells.
- The changes which take place in a long period of time are called slow changes whereas that changes which take place in a short period of time are called fast changes.
- Yes tearing of paper is irreversible but not a chemical change as we cannot get the original paper back in its original for and a new substance is not formed.
Quiz: Changes Around Us
Most of the things around us are changing all the time. Some common change we observe are: changes in water, alternation of day and night, cooking of food, spoilage of food if kept for long, rusting of iron, burning of paper, wood and fuels, changes in plants germination of seeds, growth, flowering, formation of fruits.
- Question 1 of 18
1.
In a physical change _____
Correct
Wrong! Correct answer is The molecules of the substances do not change.
- Question 2 of 18
2.
Growth in plants and animals is _____
Correct
Wrong! Correct answer is A chemical change
- Question 3 of 18
3.
If two substances are brought in contact, it will result in _______
Correct
Wrong! Correct answer is Either a physical change or a chemical change depending on the conditions.
- Question 4 of 18
4.
Chemical changes are _______
Correct
Wrong! Correct answer is Mostly irreversible.
- Question 5 of 18
5.
Which of these is an irreversible change?
Correct
Wrong! Correct answer is Burning of wax
- Question 6 of 18
6.
Which of these is a irreversible change?
Correct
Wrong! Correct answer is Melting of wax
- Question 7 of 18
7.
Which of the following is a physical and reversible change?
Correct
Wrong! Correct answer is Melting of ice to from water
- Question 8 of 18
8.
Which of these is a physical and irreversible change?
Correct
Wrong! Correct answer is Breaking of a glass tumbler
- Question 9 of 18
9.
Baking of dough into bread is a kind of change _____
Correct
Wrong! Correct answer is That cannot be reversed
- Question 10 of 18
10.
Which of the following is a reversible change?
Correct
Wrong! Correct answer is Melting of ice
- Question 11 of 18
11.
Which of the following is a desirable change?
Correct
Wrong! Correct answer is Burning of cooking gas
- Question 12 of 18
12.
Salt can be separated from its solution (salt dissolved in water), because _______
Correct
Wrong! Correct answer is Mixing of salt in water is a change that can be reversed by evaporation.
- Question 13 of 18
13.
Which of the following is an example of periodic change?
Correct
Wrong! Correct answer is Heartbeat
- Question 14 of 18
14.
Changes in which heat is liberated are called _________
Correct
Wrong! Correct answer is Exothermic changes
- Question 15 of 18
15.
Iodine sublimes on heating i.e. directly changes into a gas state without going through liquid state. Which of the following change is not true for iodine sublimation?
Correct
Wrong! Correct answer is Change is chemical
- Question 16 of 18
16.
In general, on heating metals _______
Correct
Wrong! Correct answer is Expand
- Question 17 of 18
17.
Iron rim is made slightly smaller than the wooden wheel. The rim is usually heated before fixing into the wooden wheel, because on heating the iron rim ______
Correct
Wrong! Correct answer is Expands first, then on cooling contracts and fits onto the wooden wheel.
- Question 18 of 18
18.
Which of the following can be considered as fast change?
Correct
Wrong! Correct answer is Bursting of crackers
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