GENERAL SCIENCE #48
MULTIPLE CHOICE QUESTIONS
1.
In which type of change a new substance is formed?
(a) In physical change
(b) In chemical change
(c) Both ‘a’ and ‘b’
(d) None of the above
Answer:
(b)
2. Which
among the following is a physical change?
(a) Cutting a log of wood in small pieces
(b) Burning of wood
(c) Ripening of fruit
(d) Cooking of food
Answer:
(a)
3. Which
of the following is a chemical change?
(a) Bursting of a fire cracker
(b) Germination of seed
(c) Coal formation from buried trees
(d) All of the above
Answer:
(d)
4. Which
is a method to prevent rust?
(a) Crystallization
(b) Sedimentation
(c) Galvanisation
(d) None of the above
Answer:
(c)
5. How
crystals of pure substances are obtained?
(a) By crystallization
(b) By chromatography
(c) By peptization
(d) All of the above
Answer:
(a)
6. What
is the formula of rust?
(a) Fe2O3
(b) Fe3O4
(c) FeO
(d) None of the above
Answer:
(a)
7. What
will happen if carbon dioxide gas is passed through lime water?
(a) Calcium carbonate is formed
(b) The lime water turns milky
(c) Both ‘a’ and ‘b’
(d) None of the above
Answer:
(c)
8. Iron
pillar near the Qutub Minar in Delhi is famous for the following facts. Which
of these facts is responsible for its long stability?
(a) It is more than 7 metres high
(b) It weighs about 6000 kg
(c) It was built more than 1600 years ago
(d) It has not rusted after such a long period
Answer:
(d)
9. Galvanisation
is a process used to prevent the rusting of which of the following?
(a) Iron
(b) Zinc
(c) Aluminium
(d) Copper
Answer:
(a)
10. Roohi’s
mother made a concentrated sugar syrup by dissolving sugar in hot water. On
cooling, crystals of sugar got separated. This indicates a ……………
(a) physical change that can be reversed
(b) chemical change that can be reversed
(c) physical change that cannot be reversed
(d) chemical change that cannot be reversed
Answer:
(a)
11. Which
among the following is generally not predicted in a daily weather report?
(a) Temperature
(b) Pressure
(c) Humidity
(d) Rainfall
Answer:
(b)
12. Weather
changes ……………
(a) week after week
(b) day after day
(c) within a short period
(d) Any of ‘a’, ‘b’ and ‘c’
Answer:
(d)
13. Rainfall
is measured by which of the following?
(a) Rain gauge
(b) Water level increase in ponds
(c) Water level increase in water table
(d) None of the above
Answer:
(a)
14. Given
below are some adaptive features of animals:
(i)
Layer of fat under the skin
(ii)
Long, curved and sharp claws
(iii)
Slippery body
(iv)
Thick white fur
Which
of them are the adaptive features of a polar bear?
(a) (i) only
(b) (i) and (ii) only
(c) (i), (ii) and (iii) only
(d) (i), (ii) and (iv) only
Answer:
(d)
15. Which
of the following statement is incorrect for penguins?
(a) They huddle together
(b) They cannot swim
(c) They have webbed feet
(d) They have streamlined body
Answer:
(b)
16. Read
the following environmental conditions of tropical rain forests:
(i)
Hot and humid climate
(ii)
Unequal lengths of day and night
(iii)
Abundant rain fall
(iv)
Abundant light and moisture
Identify
the conditions from the above list that are responsible for the presence of
large number of plants and animals in tropical rain forests.
(a) (i) and (ii)
(b) (i) and (iii)
(c) (i), (iii) and (iv)
(d) (ii) and (iv)
Answer:
(c)
17. Which
is the coldest region on earth?
(a) Polar region
(b) Tropical region
(c) Temperate region
(d) Coastal region
Answer:
(a)
18. Choose
the odd one from the following options.
(a) Thick layer of fat under the skin
(b) White fur
(c) Long grasping tail
(d) Wide and large feet with sharp claws
Answer:
(c)
19. Which
of the following is not an adaptive feature in polar bear?
(a) White fur
(b) Strong sense of smell
(c) Long curved and sharp claws
(d) Long tail
Answer:
(d)
20. Which
is the characteristic feature of tropical rainforests?
(a) Hot and humid climate
(b) Enormous number and variety of animals
(c) Competition for food and shelter
(d) All of the above
Answer:
(d)
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