Tag: rocks and minerals

Quizzes (5) Questions (347)

Questions Related to rocks and minerals

Multiple choice chemistry rocks and minerals petroleum properties of alkanes petroleum and natural gas

Coal and petroleum are called fossil fuels.

State whether the statement is True or False

  1. The statement is True

  2. The statement is False

  3. Neither

  4. Coal and petroleum are called natural fuels.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coal and petroleum are called fossil fuels. They serve as source of energy as on combustion, they release heat energy.

Multiple choice chemistry rocks and minerals petroleum properties of alkanes petroleum and natural gas

The strong smelling substance added to LPG is:

  1. ethyl mercaptan

  2. ethanol

  3. ethanal

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

LPG gas is basically propane and butane, and it is odorless in its natural state. The smell that you notice when there is a leak is actually the stench of an entirely different agent, called ethyl mercaptan ($C _2H _6S$). This substance is added to the gas when it leaves the main storage terminals.

Multiple choice chemistry rocks and minerals petroleum properties of alkanes petroleum and natural gas

The chemical added to LPG to help detect its leakages is:

  1. isobutene

  2. ethylamine

  3. methyl mercaptan

  4. ethyl mercaptan
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

LPG gas is basically propane and butane, and it is odorless in its natural state. The smell that you notice when there is a leak is actually the stench of an entirely different agent, called Ethyl Mercaptan (C2H6S). This substance is added to the gas when it leaves the main storage terminals.

Multiple choice chemistry rocks and minerals petroleum properties of alkanes petroleum and natural gas

The main constituent of LPG is:

  1. methane

  2. butane

  3. propane

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

LPG constitutes both propane and butane in equal percentages.
Liquefied Petroleum Gas or LPG (also called Autogas) consists mainly of propane, propylene, butane, and butylene in various mixtures. It is produced as a by-product of natural gas processing and petroleum refining. The components of LPG are gases at normal temperatures and pressures.

Multiple choice chemistry rocks and minerals petroleum properties of alkanes petroleum and natural gas

What odorant is added to LPG to detect the leakage with smell?

  1. alcohol

  2. organo sulphur compounds

  3. coal tar

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

As LPG is odourless and the organo-sulphur compound has an unpleasant smell.


Hence, to detect the leakage, ethyl mercaptan (ethanethiol) is added to LPG which is an organo-sulphur compound.

Therefore, option B is correct.