Quiz On Coal And Petroleum

Ravi is helping to conserve energy resources by going to school using a bicycle. This is because using a bicycle as a mode of transportation does not require any fuel or energy consumption, unlike using a car or other motorized vehicles. By choosing to use a bicycle, Ravi is reducing the demand for fossil fuels and minimizing air pollution, contributing to the conservation of energy resources.

CNG (Compressed Natural Gas) is considered the least polluting fuel among the given options. Compared to petrol, diesel, and kerosene, CNG produces lower levels of harmful emissions such as carbon dioxide (CO2), nitrogen oxides (NOx), and particulate matter (PM). It is a cleaner-burning fuel that contributes less to air pollution and greenhouse gas emissions, making it a more environmentally friendly choice.

Natural gas is not obtained from the destructive distillation of coal. Natural gas is primarily composed of methane and is formed from the decomposition of organic matter deep within the Earth's crust over millions of years. On the other hand, coal tar, coal gas, and coke are all products that can be obtained through the destructive distillation process of coal.

Vani is correct because using alternative sources of energy is important to reduce our dependence on fossil fuels, which are non-renewable resources and contribute to environmental pollution. Rani is wrong because although fossil fuel reserves may be abundant, it is not sustainable or environmentally responsible to use them to a maximum extent without considering the long-term consequences.

The explanation for the correct answer "I is true, II is false" is that statement I is true because wind and sunlight are indeed inexhaustible resources of energy. These sources of energy are renewable and will not run out. However, statement II is false because while wind and sunlight energy may be considered clean and environmentally friendly, the initial cost of setting up the infrastructure to harness this energy can be expensive. Therefore, the energy harnessed from wind and sunlight is not necessarily very less expensive.

The odd one out in this group is "Bio-diesel" because it is the only fuel source that is derived from organic materials, specifically plant or animal fats. LPG, CNG, and coal are all fossil fuels, while bio-diesel is a renewable energy source.

Coal and petroleum are not inexhaustible resources of energy because they are fossil fuels that are formed over millions of years and will eventually run out. On the other hand, geothermal energy and biogas are considered inexhaustible resources because they are derived from renewable sources such as heat from the Earth's core and organic waste, respectively, which can be continuously replenished.

The correct sequential order is as follows:
1) Burning of coal in the absence of air (b)
2) Coal (c)
3) Coal tar (a)
4) Naphthalene (d)

First, coal is burned in the absence of air, which results in the formation of coal tar. Coal tar is a byproduct of this process. Naphthalene is a compound that can be derived from coal tar. Therefore, the correct order is C, b, a, d.

The correct answer is B and c. This means that LPG is collected from the uppermost level of the column and asphalt is collected as a residue. Fractional distillation is a process used to separate crude oil into different fractions based on their boiling points. The fractions with lower boiling points, such as LPG, will rise to the top of the column and can be collected from the uppermost level. On the other hand, the fractions with higher boiling points, such as asphalt, will not vaporize and will be left as a residue at the bottom of the column.

Bio-diesel is a renewable source of energy that is prepared from plant oils or animal fats. It is non-toxic and has several environmental benefits. However, the statement that it requires less cultivatable land is not true. The production of bio-diesel requires a significant amount of land for growing crops such as soybeans, canola, or palm oil, which are used to extract the oils needed for bio-diesel production. Therefore, bio-diesel production actually competes with food crops for land and resources, which can have negative impacts on food security and land use.