Some statements about heavy water are given below:
(i) Heavy water is used as a moderator in nuclear reactors.
(ii) Heavy water is more associated than ordinary water.
(iii) Heavy water is more effective solvent than ordinary water.
Which of the above statements are correct?
A
(i) and (ii)
B
(i), (ii) and (iii)
C
(ii) and (iii)
D
(i) and (iii)
Explanation
Heavy water is used for slowing down the
speed of neutrons in nuclear reactors, hence used
as moderator. Boiling point of heavy water is greater
(374.42 K) than that of ordinary water (373 K), hence
heavy water is more associated. Dielectric constant
of ordinary water is greater than that of heavy water,
hence ordinary water is a better solvent.
2
AIPMT 2003
MCQ (Single Correct Answer)
The structure of H2O2 is
A
spherical
B
non-planar
C
planar
D
linear
Explanation
In H2O2
, the O–H groups
are not in the same plane. So it
has non-planar structure. It has a
half-opened book structure in
which the two O–H groups lie on
the two pages of the book. The
angle between two pages of the
book is 94o and H–O–O bond
angle is 97o.
Questions Asked from Hydrogen
On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
