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CBSE Questions for Class 8 Chemistry Coal And Petroleum Quiz 7 - MCQExams.com
CBSE
Class 8 Chemistry
Coal And Petroleum
Quiz 7
Petroleum is a limited natural product obtained from:
Report Question
0%
organism living on land
0%
organism living in sea
0%
Both A and B
0%
All of these
Explanation
Petroleum was formed from organisms living in the sea. As these organisms died, their bodies settled at the bottom of the sea and got covered with layers of sand and clay. Over millions of years, absence of air, high temperature and high pressure transformed the dead organisms into petroleum.
State whether true or false:
Coke is impure form of carbon.
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0%
True
0%
False
Explanation
Coke is an almost pure form of carbon.
It is a tough, porous, and black substance.
Coke is used in the manufacture of steel and in the extraction of many metal.
Therefore, the given statement is wrong.
The fibers which are manufactured from petrochemicals are __________.
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0%
Nylon
0%
Polyester
0%
Acrylic
0%
All of these
Explanation
Petrochemicals are the products of petroleum by which different types of fibres like nylon, polyester and acrylic all are prepared.
Naphthalene balls are prepared from which of these natural resources?
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0%
Charcoal
0%
Coal tar
0%
Petroleum
0%
All of these
Explanation
Naphthalene balls are a product of coal tar. Coal tar is obtained form coal.
Hydrogen gas obtained form natural gas is used in ___________.
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0%
motor fuel
0%
fertilizers
0%
stoves
0%
paints
Explanation
Natural gas which is obtained from petroleum produces hydrogen gas. Hydrogen gas is used as fertilizer in the fields.
Which one of the following material is used for making shoe polish?
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0%
Paraffin wax
0%
Petrol
0%
Diesel
0%
Lubricating oil
Explanation
Paraffin wax is used for making shoe polish. Paraffin wax act as a covering that protects the shoe surface from water, scratches, and fungal growth. Hence option A is corrrect.
The main constituent of coal is:
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carbon
0%
oxygen
0%
air
0%
water
Explanation
The main constituent of coal is $$carbon$$,
Which one of the following is less polluting fuel?
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0%
Natural gas
0%
Coal
0%
Kerosene
0%
Petrol
Explanation
Natural gas is less polluting fuel because it contains lower carbon ($$C$$) content than the rest. It produces the fewest emission products of all other. As it produces the fewest greenhouse gases than the rest hence, we can say that it is a less polluting fuel.
Hence, option $$A$$ is correct.
Natural gas is mostly transported through _________.
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0%
pipes
0%
cylinders
0%
barriers
0%
none of these
Explanation
Natural gas is a product of petroleum that is used in the form of compressed natural gas and mostly transported through pipes.
Carbonisation of coal is done to meet the demand coke and coal tar.
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0%
True
0%
False
Explanation
Carbonization of coal is done to meet the demand for coke (required by the steel industry as fuel) and coal tar (a rich source of aromatic compounds).
State whether the given statement is true or false.
Statement: Coal tar is a mixture of about 200 chemicals.
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0%
True
0%
False
Explanation
It is a black, thick liquid with an unpleasant smell. It is a mixture of about 200 substances. Products obtained from coal tar are used as starting materials for manufacturing various substances used in everyday life and in industry, like synthetic dyes, drugs, explosives, perfumes, plastics, paints, photographic materials, roofing materials, etc.
Hence the given statement is true.
Hydrocarbons are obtained from Kerogens through____.
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0%
catalysis
0%
catagenesis
0%
cataphoresis
0%
bacterial and Fungal decomposition
Explanation
The process of formation of petroleum causes the organic matter to change, first into a waxy material known as kerogen
, which is found in various oil shales
around the world, and then with more heat into liquid and gaseous hydrocarbons via a process known as
c
atagenesis
.
Heavier crude oils have too much of:
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0%
Carbon
0%
Hydrogen
0%
Both Carbon and Hydrogen
0%
Sulphur
Explanation
Because heavier crude oils have too much carbon and not enough hydrogen, the cracking processes generally involve removing carbon from or adding hydrogen to the molecules and using fluid catalytic cracking
to convert the longer, more complex molecules in the oil to the shorter, simpler ones in the fuels.
Kerogen is a:
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0%
waxy material
0%
oily material
0%
toxic material
0%
carcinogenic material
Explanation
Kerogen is a waxy, insoluble organic substance that forms when organic shale is buried under several layers of sediment and is heated. If this kerogen is continually heated, it leads to the slow release of fossil fuels such as oil and natural gas, and also the non-fuel carbon compound graphite.
Hence, the correct option is $$A$$
Anthracene present in coal tar is __________ in nature.
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Neutral
0%
Acidic
0%
Basic
0%
Amphoteric
Explanation
Anthracene present in coal tar is neutral in nature. Other neutral hydrocarbons include benzene, toluene, and naphthalene.
Which of the following is basic compound present in coal tar?
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0%
Quinoline
0%
Benzene
0%
Toluene
0%
Phenol
Explanation
Quinoline is basic compound present in coal tar. Other basic compound present in coal tar is pyridine.
Benzene and toluene are neutral compounds.
Phenol is acidic compound.
Colour of crude oil is:
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0%
brownish black
0%
light yellow
0%
transparent
0%
white
Explanation
Crude oil is the raw material which is obtained from the earth's crust by drilling. It is brownish black in colour. It is then refined to obtain useful products such as petrol, diesel, kerosene, lubricating oil, etc.
Boiling point of petrol is:
Report Question
0%
below $$20^{\circ}C$$
0%
$$170-120^{\circ}C$$
0%
$$35-70^{\circ}C$$
0%
$$270-340^{\circ}C$$
Explanation
Petrol is obtained at the temperature of $$35 - 70^{\circ}$$ when petroleum is heated in a refinery.
Which of the following is a component of Petroleum?
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0%
Paraffins
0%
diesel
0%
lubricating oil
0%
All of the above
Explanation
Petroleum is a mixture of a very large number of different hydrocarbons
; the most commonly found molecules are alkanes
(kinds of paraffin), cycloalkanes
(naphthenes
), aromatic hydrocarbons
, or more complicated chemicals like asphaltenes
. Each petroleum variety has a unique mix of molecules
, which define its physical and chemical properties, like colour and
v
iscosity
.
How much of total crude oil of India is obtained from Gujarat ?
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About 50% of total crude oil of India
0%
About 60% of total crude oil of India
0%
About 70% of total crude oil of India
0%
About 40% of total crude oil of India
Explanation
About 50% of total crude oil of India is obtained from Gujarat.
The average boiling point of aviation turbine fuel is closest to that of:
Report Question
0%
diesel
0%
LPG
0%
Kerosene
0%
lubricating oils
Explanation
Aviation turbine fuel means a refined middle distillate suitable for fuel in an aviation gas turbine internal combustion engine. Its boiling point is closest to that of kerosene.
The second largest market for coal is:
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0%
export.
0%
electricity generation.
0%
the industrial and retail sector.
0%
the iron and steel industry.
Explanation
Coal has four major markets
(i) Electric utilities
(ii) Industrial/ Retail user
(iii) Steel industry
(iv) Exports
Electric utilities use more than $$86$$% of the coal.
Coal's second-largest market is industrial and retail users, among industries using coal, the largest consumers are chemical manufacturers.
What is called black gold?
Report Question
0%
Petroleum
0%
Natural gas
0%
Coal Tar
0%
Coal
Explanation
Petroleum is known as black gold as it is the black coloured crude oil extracted from the earth's crust and has high value as it is present in limited quantity and takes millions of years to form but has many applications in the industries. Hence is as valuable as gold.
______ is the chief component of natural gas.
Report Question
0%
Ethane
0%
Methane
0%
Propane
0%
Butane
Explanation
Natural gas is a fossil fuel. It is used for cooking, heating and electricity generation. It is found in the deep underground rock formation. It is a naturally occurring hydrocarbon gas mixture consisting primarily of methane. I
ts compressed form (CNG) is also used as fuel for vehicles.
Naphthalene, which is used to repel moths and other insects is obtained from:
Report Question
0%
Coal tar
0%
Petroleum
0%
Coke
0%
Paraffin
Explanation
Naphthalene which is used to repel moths and other insects is obtained from coal tar. Coal tar is a thick black liquid.
Where and when was the world's first oil well dug ?
Report Question
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in 1959 AD in Pennsylvania (USA).
0%
in 1859 AD in Pennsylvania (USA).
0%
in 1849 AD in Pennsylvania (USA).
0%
in 1989 AD in Pennsylvania (USA).
Explanation
The world's first oil well was dug in 1859 AD in Pennsylvania (USA).
The first oil well dug in India:
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0%
in 1967 AD
0%
in 1857 AD
0%
in 1767 AD
0%
in 1867 AD
Explanation
The first oil well in India has dug in $$1867$$ AD in Makum in Assam.
Which two transportation means move nearly two-thirds of all U.S. coal shipments?
Report Question
0%
railroads and barges
0%
barges and coal slurry pipelines
0%
trucks and covered conveyor systems
0%
railroads and trucks
Explanation
Most coal sent from mine to market travels either by railroad or by barge. Railroads handle the most coal, which is the largest single commodity carried by the rail industry. Barges operating along inland waterways and intercoastal and lake routes handle about 20 percent of domestic coal movements. Railroads and barges combined move nearly two-thirds of all U.S. coal shipments.
___________ is added to LPG to detect leakage .
Report Question
0%
Propene
0%
Hexanol
0%
Isobutane
0%
Mercaptan
Explanation
A foul smelling chemical (mercaptan) is added to LPG to detect leakage.
Petroleum is a/an ________natural resource.
Report Question
0%
exhaustible
0%
inexhaustible
0%
Both A and B
0%
None of these
Explanation
Petroleum is an exhaustible natural resource because it gets consumed over time. It cannot be replenished.
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