Tag: chemistry

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Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Hydrocarbons are obtained from Kerogens through____.

  1. catalysis

  2. catagenesis

  3. cataphoresis

  4. bacterial and Fungal decomposition
Reveal answer Fill a bubble to check yourself
B Correct answer
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 catagenesis.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Gum formation in stored gasoline is mainly due to the:

  1. alkylation of unsaturated.

  2. the presence of sulphur.

  3. oxidation & polymerisation of unsaturates.

  4. higher aromatic content.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gasoline is a volatile mixture of liquid hydrocarbons generally containing small amounts of additives suitable for use as a fuel in a spark ignition internal combustion engine. The presence of sulphur in gasoline is undesirable due to its foul odour and also it forms gums.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Illuminating characteristics of kerosene is expressed by its:

  1. aromatic content

  2. aniline point

  3. luminosity number

  4. smoke point
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kerosene has been used for illumination since centuries. The capacity of kerosene to be illuminating depends on the luminosity number of kerosene. 

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Glycol added to petrol act as an _______ agent.

  1. anti-knocking

  2. anti-gum forming

  3. anti-icing

  4. dewaxing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Glycol added to petrol acts as anti -icing agent

Anti -icing is a application of chemicals that not only de-ice, but also remain on a surface and continue to delay the reformation of ice for a certain period of time, or prevent adhesion of ice to make mechanical removal easier.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Which of the following is desirable in diesel and kerosene but is undesirable in gasoline?

  1. Paraffins

  2. Mercaptans

  3. Aromatics

  4. Naphthenic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aromatics are desirable in diesel and kerosene but is undesirable in gasoline. It is a mixture of paraffin (alkanes), cycloalkanes (naphthenes), and olefins (alkenes). Aromatics are a base component of gasoline derived from crude oil. Refiners manipulate these substances – mainly mixtures of chemicals like benzene, toluene, and xylene – to increase the octane rating, a measure of how well the fuel actually works.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Petroleum is ________natural resource .

  1. exhaustible

  2. Inexhaustible

  3. both (a) & (b)

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Petroleum is a non-renewable natural resource. It gets exhausted because it is not a natural renewable source.

So, Petroleum is exhaustible natural resource.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

 What is called black gold?

  1. Petroleum

  2. Natural gas

  3. Coal Tar

  4. Coal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Petroluem is known as black gold as it is black coloured crude oil that is extracted from earth's crust and it has its value as it is limited in stock, takes millions of years to form and is costly available.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Molecular weight of crude petroleum may be around:

  1. $500$
  2. $1000$
  3. $2500$
  4. $1500$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crude petroleum is the multi component mixture consisting of many compounds. It is drilled from the earth's crust and then refined in the petroleum refineries. Its molecular weight is around $1500$.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

The layer containing petroleum oil and gas is:

  1. below water

  2. between water and sand

  3. below sand

  4. above the water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The density of gasoline ranges from 0.71–0.77 kg/L, where as that of water is 1kg/L, oil is less dense than water so it will "float" on water. Gas is less dense than both and will float to the top. higher densities having a greater volume of aromatics. Since gasoline floats on water, water cannot generally be used to extinguish a gasoline fire unless used in a fine mist. The petroleum products will separate by density.