Coal is processed in industries to form
A. Coke
B. Bitumen
C. Natural gas
D. Paraffin wax
2. Which of Carbonisation involves
A. Covering dead remains of animals with a layer of carbon containing compounds
B. Burning of petroleum products
C. Slow conversion of dead vegetation into coal
D. Mixing carbon-dioxide and carbon – monoxide
3. The naphthalene balls used to repel moths and other insects are obtained from
A. Coke
B. Coal tar
C. Petroleum
D. Natural gas
4. Coal tar is used as starting material to prepare ----- --.
A. Petroleum
B. Explosives
C. Natural gas
D. Diesel
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Answers
Answer:
. Various materials which are obtained from nature are called natural resources. Which of the following is not a natural resource?
(a) minerals
(b) water
(c) soil
(d) plastic
Soln:
Answer is (d) plastic
Explanation:
Minerals, water and soil are natural resources whereas plastic is a man-made substance.
2. Air is a natural resource and cannot be exhausted by human activities. It is known as an inexhaustible natural resource. Which of the following is another inexhaustible natural resource?
(a) coal
(b) petroleum
(c) sun-light
(d) minerals
Soln:
Answer is (c) sun-light
Explanation:
Caol, petroleum and minerals are non-renewable sources of energy, which can get exhausted whereas sunlight is a renewable resource.
3. Which of the following is a pair of exhaustible natural resources?
(a) coal and soil
(b) air and sun-light
(c) water and petroleum
(d) wildlife and minerals
Soln:
Answer is (d) wildlife and minerals
Explanation:
Coal and Soil, air and sunlight, water and petroleum. All these natural resources cannot be exhausted by human consumption and other uses. Wildlife and minerals are exhaustible natural resources, which are available in limited quantities and will be exhausted as a result of continuous use.
4. Coal is processed in industries to get some useful products. Which of the following is not obtained from coal?
(a) coke
(b) coal tar
(c) coal gas
(d) CNG
Soln:
Answer is (d) CNG
Explanation:
CNG is compressed natural gas which is made by compressing the natural gas. CNG is a petroleum product whereas coke, coal tar and coal gas are obtained from coal.
5. Exhaustible natural resources are:
(a) unlimited in quantity.
(b) not dependent on nature.
(c) limited in quantity.
(d) not exhausted by human activities.
Soln:
Answer is (c) limited in quantity.
Explanation:
Exhaustible natural resources are limited resources, which are available in limited quantities and are
going to be exhausted by continuous human use. Wildlife, petroleum, water and minerals are examples of Exhaustible natural resources.
6. Fossil fuels are obtained from:
(a) remains of non-living materials.
(b) dead remains of birds only.
(c) dead remains of insects only.
(d) dead remains of living organisms.
Soln:
Answer is (d) dead remains of living organisms
Explanation:
Fossil fuels are obtained millions of years ago remains of dead remains of living organisms. Get buried under the earth.
7. Coal is formed from the remains of
(a) vegetation only
(b) animals only
(c) both vegetation and animals
(d) neither vegetation nor animals
Soln:
Answer is (a) vegetation only
Explanation:
Coal is a fossil fuel formed from the remains of prehistoric plants or animals. The formation of coal occurs over millions of years via a process known as carbonation.
8. Which substance is formed by the carbonisation of dead vegetation?.
(a) coal
(b) coke
(c) coal gas
(d) coal tar
Soln:
Answer is (a) coal
Explanation:
The formation of coal occurs over millions of years via a process known as carbonation. In this process, dead vegetation is converted into carbon-rich coal under very high temperature and pressure.
9. Naphthalene balls are obtained from coal tar and are used as:
(a) mosquito repellant
(b) honey bee repellant
(c) moth repellant
(d) snake repellant
Soln:
Answer is (c) moth repellant
Explanation:
Naphthalene balls are chemical pesticide and deodorant, the characteristic smell of naphthalene makes the insects and moth run away from naphthalene stored under clothes etc.
10. Which of the following is not a constituent of petroleum?
(a) paraffin wax
(b) lubricating oil
(c) petrol
(d) coke
Soln:
Answer is (d) Coke
Explanation:
Coke is not a constituent of petroleum. It is almost a pure form of carbon.
11. Petroleum was formed from organisms:
(a) living on the land
(b) living on the plants
(c) living in the sea
(d) living on the rocks
Soln:
Answer is (c) living in the sea
Explanation:
Petroleum was formed from organisms living in the sea. As these organisms died, their bodies settled down 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 and natural gas.
12. Choose the incorrect statement from the following:
(a) It is difficult to transport natural gas through pipes.
(b) The disadvantage of natural gas is that it can not be used directly for burning in homes.
(c) Natural gas is stored under high pressure as compressed natural gas.
(d) Natural gas cannot be used for power generation.
Soln:
Answer is (a) It is difficult to transport natural gas through pipes.
Explanation:
Natural gas is a naturally occurring hydrocarbon gas, which is extracted from the petroleum deposits deep beneath the earth. It is a highly flammable gas, therefore, it is difficult to transport through pipes.
Answer:
1)coke
2) Mixing carbon-dioxide and carbon – monoxide
3)coal tar
4)petroleum