Tag: occurrence of carbon compounds in nature

Questions Related to occurrence of carbon compounds in nature

In a hydropower plant :

  1. electricity is extracted from water

  2. water is converted into steam to produce electricity

  3. potential energy possessed by stored water is converted into electricity

  4. kinetic energy possessed by stored water is converted into potential energy


Correct Option: C
Explanation:

In hydropower plant, the potential energy possessed by the stored water is converted into electricity with help of a turbine of an electric generator.

A biofuel is produced by:

  1. agricultural digestion

  2. anaerobic digestion

  3. geological process

  4. all of the above


Correct Option: A,B
Explanation:

$\Rightarrow$  Bio-fuels are designed to replace gasoline, diesel fuel and coal, which are called “fossil fuels” because they are made from animals and plants that died millions of years ago. 

$\Rightarrow$  Bio-fuels are made mostly from plants that have just been harvested.
$\Rightarrow$  A Bio-fuel is produced by: $Agriculture\,digestion$ and $Anaerobic\,digestion$.

Identify from the following a conventional source of energy.

  1. Solar Energy

  2. Tidal Energy

  3. Natural Gas

  4. Bio Energy


Correct Option: C
Explanation:

Conventional energy directly mean the energy source which is fixed in nature like oil, gas and coal. In other words conventional energy is also termed as non-renewable energy sources. Their use leads to increased greenhouse gas emissions and other environmental damage. Natural gas is a fossil fuel used as a source of energy for heating, cooking, and electricity generation. It is also used as fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals. It is a non-renewable resource.

Major constituent of LPG is:

  1. ethene

  2. butane

  3. propane

  4. pentane


Correct Option: B
Explanation:

Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane, are flammable mixtures of hydrocarbon gases used as fuel in heating appliances, cooking equipment, and vehicles. The percentage of butane is around 70% and that of propane is around 30%.

L.P.G. is a hydrocarbon consisting of a mixture of:

  1. methane and butane

  2. propane and butane

  3. ethane and propane

  4. ethane and butane


Correct Option: B
Explanation:

Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane, are flammable mixtures of hydrocarbon gases used as fuel in heating appliances, cooking equipment, and vehicles. The percentage of butane is around 70% and that of propane is around 30%.

Choose the correct statement.

  1. Hydro and wind energy plants are non-polluting sources of energy

  2. There is infinite storage of fossil fuel inside the earth

  3. Sun can be taken as an inexhaustible source of energy

  4. Waste from a nuclear power plant can be easily disposed off


Correct Option: A,C
Explanation:

Hydro and wind energy plants are non-polluting sources of energy as they do not emit any kind of harmful substances.

Sun can be taken as an inexhaustible source of energy.

The power generated in a windmill: 

  1. is more in rainy season since damp air would mean more air mass hitting the blades

  2. can be increased by planting tall trees close to the tower

  3. depends on the height of the tower

  4. depends on wind velocity


Correct Option: D
Explanation:

Power generated in a windmill depends on the velocity of the wind. More is the velocity $\longrightarrow$ more will be the velocity of the windmills thereby generating more power.

____________ contribute to sewer gas hazards.

  1. Improper disposal of petroleum products

  2. Only gasoline

  3. Only mineral spirits

  4. None of these.


Correct Option: A
Explanation:

Sewer gases may include hydrogen sulphide, ammonia, $CO,SO _2,NO$, etc. Improper disposal of petroleum products such as gasoline and mineral gas spirits contribute to sewer gas hazards.

The residue from biogas plant serves as _______manure.

  1. inorganic

  2. organic

  3. synthetic

  4. none of these


Correct Option: B
Explanation:

Biogas is produced by anaerobic degradation of biological materials such as food wastes, animal and plant wastes. Biogas is produced when organic matter decomposes without oxygen in a process which is called anaerobic decomposition. Biogas consists mainly of methane, carbon dioxide and small amounts of impurities/residues.

So the residue from biogas plant serves as organic manure.

The nuclear reaction-
${ _{ 1 }^{ 2 }{ H } } +{ _{ 1 }^{ 2 }{ H } } _{  }\longrightarrow { _{ 2 }^{ 4 }{ He } }$ is called:

  1. fission reaction

  2. fusion reaction

  3. chain reaction

  4. thermal reaction


Correct Option: B
Explanation:

Nuclear fusion is a process where two or more nuclei combine to form an element with a higher atomic number (more protons in the nucleus). Fusion is the reverse process of nuclear fission.

The nuclear reaction -
${ _{ 1 }^{ 2 }{ H } } +{ _{ 1 }^{ 2 }{ H } } _{  }\longrightarrow { _{ 2 }^{ 4 }{ He } }$ is fusion reaction because two nuclei combine to form an element with higher atomic number.During this process, 0.7% of the mass is carried away from the system in the form of kinetic energy.
So the answer is B.