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WorksheetsCarbon and it's compounds
Total questions: 30
Worksheet time: 27mins
Which of the following statements about graphite and diamond is true?
They have the same crystal structure
They have the same degree of hardness
They have the same electrical conductivity
They can undergo the same chemical reactions
Carbon is arranged in what shape to make diamond?
Triangle
Hexagon
Octahedron
Tetrahedron
From which of the following substance pencil lead is formed?
Charcoal
Wood
Lead
Graphite
Which is not a property of carbon dioxide?
It is a colorless gas
It supports combustion
It is denser than air
It is an odorless gas
Which two substances are combined to make carbon dioxide in the lab?
hydrochloric acid and calcium carbonate
hydrochloric acid and calcium chloride
water and calcium chloride
water and carbon dioxide
Carbon monoxide is:
A poisonous gas that is colorless, odorless, and tasteless
A product of fuel burning appliances
Dangerous when inhaled because it displaces oxygen in the blood, depriving vital organs of oxygen
All of the above
Name the scientist who gave CO2 the name acid carbonique.
Joseph Black
Henry Boyle
Van Helmont
Antoine Lavosier
During lab preparation of CO2 why dilute sulphuric acid is not used?
as it is a corrosive acid
as it is dehydrating
as it produces insoluble CaSO4
as it does not react with CaCO3
CuCO3 on heating------> ____ + ____
Cu + CO2
CuO + CO2
CuO + CO
Cu + CO
How is CO2 gas collected?
downward displacement of air
upward displacement of air
downward displacement of water
In a gas jar containing KOH
What is the formula of lime water?
KOH
NaOH
Ca(OH)2
Ca(HCO3)2
Name the product formed when CO2 is heated at 1500C with ammonia under pressure?
Washing soda
Baking Soda
Urea
soda water
Which property of carbon is important in the forming of many types of organic compounds
carbon has 6 electrons
carbon has 6 protons
carbon has 4 valence electrons
carbon can only bond with hydrogen
LAMPBLACK IS USED FOR MAKING:
BLACK SHOE POLISH
PRINTER'S INK
BLACK PAINTS
ALL OF THESE
AN EXTREME CONDITION CAUSED BY LACK OF OXYGEN :
HOPCALITE
CARBOGEN
ASPHYXIA
CO POISONING
In combined state, carbon occurs as
coal
diamond
graphite
petroleum
The type of coal with least carbon %
peat
lignite
bituminous
anthracite
Water gas
CO and H2
CO2 and H2O
H2O vapours
none of the above
The substance that does not burn with flame is ____________
LPG
Charcoal
Camphor
Dry grass
Which of the following is not a product of coal?
coke
bitumen
coal tar
coal gas
Which gas is produced when coal is burnt in air ?
Nitrogen
Carbon Monoxide
Hydrogen
Carbon dioxide
How much percentage of carbon is present in bituminous?
(a) 20 — 25%
(b) 25 — 35%
(c) 65 — 85%
(d) 98%
A
B
C
D
By what method can we obtain many products from coal?
Fractional Distillation
Destructive Distillation
Both
None
