Question

41. For photosynthesis green plants require:
a) Chlorophyll only b) Light
c) Carbon dioxide and water d) All of the above
42. One litre is equal to:
a) 1cm3 b) 1 m3 c) 10-3cm3 d) 10-3 m3
43. A metallic piece displaces water of volume 15 ml. The volume of piece is:
a)15 cm3 b)15 m3
c)15 × 103 cm-3 d) 15 × 103 cm3
44.A piece of paper of dimensions 1.5 m x 20 cm has area:
a) 30 m2 b) 300 cm3 c) 0.3 m2 d) 3000 m3


45. The correct relation is:
a) d = M × V b) M = d × V
c)V = d × M d) d = M +V
46.The density of alcohol is 0.8 g cm-3. In S.I. unit, it will be:
a) 0.8 kg m-3 b)0.0008 kg m-3
c)800 kg m-3 d)8 x 103kg m-3
47.The density of aluminium is 2.7 g cm-3 and of brass is 8.4 g cm-3. For the same mass, the volume of
a) both will be same
b) aluminium will be less than that of brass
c) aluminium will be more than that of brass
d) nothing can be said
48.A block of wood of density 0.8 g cm-3 has a volume of 60 cm3. The mass of block will be:
a)60.8 g b)75 g c) 48 g d) 0.013 g
49. The correct relation for speed is
a) Speed = distance x time
b) speed = distance / time
c) speed = time / distance
d) speed = 1 / distance x time
50.A boy travels a distance 150 m in 1 minute. His speed is
a) 150 m s-1 b) 2.5 m s-1 c) 25 m s-1 d) 9 m s-1
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Answer 1

Answer:

41 : (a) chlorophyll only

Answer 2

Answer:

41. all of above

42. 1m3c

43. 15m3

44.30m2

45.m=d×v

46.0.8kgm-3

47.aluminium is less than brass

48.60.8g

49.distance÷time

50.25ms-1