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LEAVING CERTIFICATE
5. Give an account of any plant community (such as
woodland, moor, sand-dune, etc.) which you have studied.
Give a list of plants found there, and say how they are
adapted for their life in that community.
6. What are the effects of [a) gravity, (&) light, on the
direction of plant growth ? Describe experiments to
illustrate your answer.
7. What are the principal means by which plants are
distributed ? Give an account, with examples, of adaptations
for dispersal.
SCIENCE
Higher Grade (Chemistry)
Wednesday, 23rd March—-2.15 p.m. to 4.15 p.m.
Not more than five questions should be attempted. Full
marks will not be awarded unless the answers are
illustrated by carefully drawn diagrams of reasonable
size and supplemented by equations wherever possible.
H = 1, O = 16, N = 14, C = 12, Cl - 35-5.
Mathematical tables will be supplied to those who desire
them.
N.B.—Write legibly and neatly, and leave a reasonable
space between the lines. Marks will be deducted for
bad writing.
1. Explain the full significance of the terms oxidation
and reduction.
Write equations for the following reactions, name the
products of the reactions, and indicate where oxidation and
reduction have taken place:—-
{a) Action of sulphuretted hydrogen on sulphur dioxide.
(6) Action of chlorine on sulphuretted hydrogen.
(c) Action of sulphur dioxide on chlorine water.
{d) Action of steam on red-hot coke.