Which of the
following catalyst is used during the addition of hydrogen into oil to convert
them into ghee and margarine?
a) Ni
b) Pt
c)Pd
d) all of these
A chemical reaction in which a single compound breaks down into two or more simple substances is called a……….reaction.
a) decomposition
b) displacement
c) double-displacement
d) combustion
Which of the
following reaction shows decomposition reaction?
a) C(s) + O2(g) ------à CO2(g)
b) 2H2O2(l)
-----à 2H2O(l) + O2(g)
c) 4Ag(s) + O2(g) ------à 2Ag2O(s)
d) 2Ca(s) + O2(g)------à
2CaO(s)
Silver chloride in the presence of sunlight breaks down into silver and chlorine. Which type of this reaction is?
a) decomposition
b) displacement
c) double-displacement
d) combustion
Ammonia breaks down and produces nitrogen and hydrogen gas. What is this reaction?
a) combustion
b) displacement
c) double-displacement
d) decomposition
Lime is produced by the decomposition of …
a) sand
b) iron oxide
c) lime stone
d) granite
