3811. Thorium metal
resembles steel in appearance.
is less hard (in the range of silver).
is highly ductile.
all (a), (b) and (c).
✅ The correct answer is option D.
3787. In a homogeneous nuclear reactor, the __________ are mixed together.
fuel & coolant
fuel & moderator
coolant & moderator
none of these
✅ The correct answer is option B.
3792. Research reactors are normally meant for
producing high neutron flux 1012-1013 neutrons/cm2, sec and studying the effect of neutron bombardment on dif ferent materials.
accelerating the neutrons.
power generation.
none of these
✅ The correct answer is option A.
3797. Nuclear fuel usually used in a Boiling Water Reactor (BWR) is
plutonium
enriched uranium
natural uranium
thorium
✅ The correct answer is option B.
3801. ‘Heavy water’ is termed as ‘heavy’ because it is
denser than water.
an oxide of deuterium.
a heavy liquid.
an oxide of heavier isotope of oxygen.
✅ The correct answer is option B.
3807. In the nuclear reaction, 93N239 94Pu239 + ?; the missing particle is a/an
electron
proton
neutron
position
✅ The correct answer is option A.
3812. Heavy water has maximum density at __________ °C.
4
11.6
0
18.6
✅ The correct answer is option B.
3817. Uranium ore is currently mined & concentrated at
Jadugoda
Ghatsila
Khetri
Alwaye
✅ The correct answer is option A.
3821. Isotopes of an element have the same
number of neutrons
mass number
electronic configuration
atomic weight
✅ The correct answer is option C.
3788. Atoms with same number of neutrons, but different number of nucleons are called
isotones
isobars
isotopes
isoters
✅ The correct answer is option A.