1. Name the following
a) Two elements which show allotropy
b) Two amorphous forms of carbon
c) Any 2 C-s of a diamond
d) Two components of wood gas
e) Two carbonates that cannot be heated to produce carbon dioxide gas.
2. Give 2 differences between diamond and graphite.
3. Give 1 use of: [3]
a) Bone charcoal
b) Lamp black
c) Fullerene
d) Carbon dioxide
e) Gas carbon
f) Graphite
Answers
Explanation:
Q.1
a)tin, carbon, sulfur, phosphorus, and oxygen
b)coal, charcoal and lamp-black.
c)The four Cs are the carat, cut, clarity, and color of a diamond and are used to determine its value. Cut describes a stone's shape and facets, which make it sparkle; clarity measures its purity; carats measure its mass
d)syngas fuel
e)sodium and potassium
Q.2
DIAMOND GRAPHITE
1) It has a crystalline structure. 1) It has a layered structure.
2) It is made up of tetrahedral 2) It has a planar
units geometry.
Q.3
1)
It is used in removing coloured impurities from liquids, especially solutions of raw sugar
2)
used as a black pigment in cements, ceramics, inks, Linoleum, crayons, shoe polishes, and Carbon paper
3)
used as an antioxidant
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