1.
in a pressure cooker, cooking is faster because
the increase in vapor pressure
a)
increases the specific heat
b)
decreases the specific heat
c)
decreases the boiling point
d)
increases the boiling point
2.
if a ship moves from freshwater into sea water,
it will
a)
sink completely
b)
sink al little bit
c)
rise a little higher
d)
Remain unaffected.
3.
Two atoms are said to be isotopes if
a)
They have the same atomic number, but different
mass numbers
b)
They have the same number of neutrons, but
different mass numbers
c)
The sum
of the number of protons and neutron is the same, but the number o \f protons
is different.
d)
They have the same numbers of neuters, but
different modes of radioactive decay.
4.
When a ray of light is going from one medium to
another, its
a)
Wavelength remains same
b)
Frequency remains same
c)
frequency increase
d)
Wavelength increase
5.
The principle of cleaning by soap is
a)
Surface tension
b)
Floatation
c)
Viscosity
d)
Elasticity
6.
Contact less are made from
a)
polyvinyl chloride
b)
polystyrene
c)
Lucite
d)
Teflon
7.
An objects is placed at the focus of a concave
mirror. The image will be
a)
Real, inverted, same size at the focus
b)
Real, upright, same size at the focus
c)
Virtual, inverted, highly enlarged infinity
d)
Real, inverted, highly enlarged at infinity.
8.
Magnet attract magnetic substances as iron,
nickel, cobalt etc. they can also repel .
a)
Paramagnetic substances
b)
Ferromagnetic substances
c)
Diamagnetic substances
d)
Non-magnetic substances
9. A current / flows through a potential difference
V in an electrical circuit containing a resistance r. the product of v and /
i.e., VI may be understood as
a)
Resistance R.
b)
Heat generated by the circuit
c)
Thermal power radiated by the circuit
d)
Rate of change of resistance.
10.
Gravitational force shares a common feature with
electromagnetic force. In both cases, the force is
a)
Between
massive and neutral objects
b)
Between charged objects
c)
A short
range
d)
A long
range
ANSWERS
1.(d)
2.(c)
3.(a
4(b).
5(a)
. 6(c)
7 (c)
8(c)
9(c)
10(a)