# Important Questions for Class 6 Science Chapter 6 Changes Around us

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# Multiple Choice Questions

Question 1
Which of the following is a desirable and undesirable changes?
(a) Burning of House
(b) Floods
(c) Landslides
(d) Burning of cooking gas
(e) rusting of iron
(f) souring of milk
(g) rottening of fruits
(e) breaking of glass tumbler

Question 2
The process of converting solid directly into gas
(a) Condensation
(b) Sublimation
(c) Melting
(d) evaporation

Question 3
Which of the following is a slow and fast changes?
(a) burning of paper
(b) formation of coal
(c) growth of the baby
(d) Rusting of iron
(e) Burning a matchstick
(f) Switching on the bulb

Question 4
Which of the following is an example of non periodic change?
(a) earthquake
(b) Landslide
(c) truck accident
(d) Rotation of fan
(e) Movement of earth around sun
(f) Phases of moon

Question 5
The process of converting gas directly into solid?
(a) Condensation
(b) Sublimation
(c) decomposition
(d) evaporation

Question 6
Which one of these is not true?
(a)Change in which heat is given out is called exothermic changes.
(b) Changes that cannot be reversed is called irreversible changes
(c) Iron contracts on heating and expand on cooling
(d) None of these

Question 7
Which of the following is a reversible change?
(a) burning of forests
(b) Ripening of fruits
(c) burning of candle
(d) Melting of ice

Question 8
Match the column
 (P) Changes in which heat is liberated (X)chemical changes (Q) change in which new substance is formed (Y) Endothermic Changes (R) changes take place by absorption of heat (Z) exothermic changes
Which of these are correct?
(a) P -> X, Q -> Y, R -> Z
(b) P -> Y, Q -> X, R -> Z
(c) P -> Z, Q -> Y, R -> X
(d) P -> Z, Q -> X, R -> Y

Question 9
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
(a) expands and fits onto the wooden wheel.
(b) contracts and fits onto the wooden wheel.
(c) no change in the size takes place.
(d) expands first, then on cooling contracts and fits onto the wooden wheel.

Question 10
Salt can be separated from its solution (salt dissolved in water), because
(a) mixing of salt in water is a change that can be reversed by heating and melting of salt.
(b) mixing of salt in water is a change that cannot be reversed.
(c) mixing of salt in water is a permanent change.
(d) mixing of salt in water is a change that can be reversed by evaporation.

• Assignments
• NCERT Solutions

Reference Books for class 6

Practicing make students fluent in their concept. Help your child practice math using our Class 6 Maths worksheets (Kindle Edition)
You can use this ebook on PC, tablet, mobile devices by using Free Kindle Reading Apps for android and ios.
Given below are the links of some of the reference books for class 6 science and class 6 math.

You can use above books for extra knowledge and practicing different questions.

### Practice Question

Question 1 What is $\frac {1}{2} + \frac {3}{4}$ ?
A)$\frac {5}{4}$
B)$\frac {1}{4}$
C)$1$
D)$\frac {4}{5}$
Question 2 Pinhole camera produces an ?
A)An erect and small image
B)an Inverted and small image
C)An inverted and enlarged image
D)None of the above

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