71 Q) "During wind storm, the roofs of houses covered with Gl Sheets may be blown off because
"
(a)Wind creates low pressure over the roof
(b)Wind creates high pressure over the roof
(c)Roofs are not tightly bound
(d)None of the above
72 Q) "In nuclear reaction which one of the following is conserved?.
"
(a)Atomic number
(b) Mass number
(c)Atomic number, mass number and energy
(d)None of the above
73 Q) "Consider the following materials
I. Bronze II. Graphite
III.Dirty water IV. Concrete
Which of the following materials given above are conductors?"
(a) I, II, III and IV
(b) I, II and III
(c) II and III
(d) II and IV
74 Q) "Who gave the first evidence of Big-bang theory? .
"
(a)Edwin Hubble
(b)Stephen Hawking
(c)S Chandrasekhar
(d)Albert Einstein
75 Q) "Which one of the following will have the maximum cohesive force?
"
(a)Liquid
(b) Gas
(c) Fluid
(d) Solid
76 Q) Which one among the following radiations carries maximum energy?.
(a)Infrared
(b) Microwave
(c) UV-rays
(d) Radio wa
77 Q) "Assertion (A) A pulsar is a source of radio waves which change intensity at the regular interval of time.
Reason (R) A pulsar is a rotating neutron star."
(a)Both A and R are true and R is the correct explanation of A
(b)Both A and R are true but R is not the correct explanation of A
(c)A is true but R is false
(d)A is false but R is true
78 Q) "Consider the following statements If there were no phenomenon of capillarity
1. It would be difficult to use a kerosene lamp
2. one would not be able to use a straw to consume a soft drink
3. the blotting paper would fail to function
4. the big trees that we see around would not have grown on the Earth Which of the statements given above is/are correct?."
(a)1, 2 and 3
(b) 1, 3 and 4
(c) 2 and 4
(d) All of these
79 Q) "Consider the following statements
I.If cyan and yellow coloured circles are intersected, the intersected area will have green.
II.If red and green coloured circles intersect, the intersected will have magenta.
Which of the statements given above is/are correct?"
(a)Only I
(b)Only II
(c) Both I and II
(d)Neither I nor II
80 Q) "Consider the following statements.
I.Diamagnetic substances have positive permeability.
II.Diamagnetic substances have negative susceptibility.
Which of the following statements given above is/are correct?."
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
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