Tag: rocks and minerals

Quizzes (5) Questions (347)

Questions Related to rocks and minerals

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

Choose the incorrect statement among the following.

  1. Many useful substances are obtained from petroleum and natural gas. These are termed as 'petrochemicals'

  2. Hydrogen gas obtained from natural gas is used in the production of fertilizers

  3. Due to the great commercial importance of petroleum, it is also called 'black gold'

  4. Natural gas is stored under low pressure as compressed natural gas (CNG)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CNG is made by compressing natural gas (which is mainly composed of methane, CH4 stored at high pressure), to less than 1 percent of the volume, it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 20–25 MPa (2,900–3,600 psi), usually in cylindrical or spherical shapes.

Thus they are stored under high pressure.

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

Which is the important constituent (95%) of natural gas?

  1. Methane

  2. Propane

  3. Ethane

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

Methane is the important constituent (95%) of natural gas. Methane has high heat of combustion. Hence, it is used as fuel.
$CH _4 + 2O _2 \rightarrow CO _2 + 2H _2O + heat$

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

The major constituent of natural gas is:

  1. methane

  2. ethane

  3. propane

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

Natural gas is primarily composed of methane, but also contains ethane, propane and heavier hydrocarbons. It also contains small amounts of nitrogen, carbon dioxide, hydrogen sulphide and trace amounts of water.

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

Which of the following is/are main component present in LPG?

  1. methane

  2. propane

  3. butane

  4. both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

LPG is liquefied petroleum gas. The main components are:

  1. butane
  2. propane
  3. propylene
  4. butylene.
All the components are gases at normal temperature and pressures.

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

Which of the following hydrocarbon exists mostly in the gaseous state under the earth surface?

  1. Pentane

  2. Butane

  3. Hexane

  4. Octane
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In its strictest sense, petroleum includes only crude oil, but in common usage, it includes all liquid, gaseous and solid hydrocarbons.Under surface pressure and temperature conditions, lighter hydrocarbons methane, ethane, propane and butane occur as gases, while pentane and heavier hydrocarbons are in the form of liquids or solids.


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

Heavier crude oils have too much of:

  1. Carbon

  2. Hydrogen

  3. Both Carbon and Hydrogen

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

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

Gas cap over crude oil is formed by:

  1. methane

  2. natural gas

  3. butane

  4. producer gas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the reservoir, crude oil is usually found in association with natural gas, which is lighter forms a "gas cap" over the petroleum, and saline water which, being heavier than most forms of crude oil, generally sinks beneath it.

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

Which of the following is a component of Petroleum?

  1. Paraffins

  2. Naphthenes

  3. Asphaltenes

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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 viscosity.