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Combustion And Flame Test - 8

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Combustion And Flame Test - 8
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Coal formation results from which of the following natural processes?
  • Question 2
    1 / -0
    Which of the following options is a non combustible substance?
  • Question 3
    1 / -0
    Which of the following options correctly defines calorific value of a fuel?
    Solution
    The amount of heat produced by the complete combustion of a material or a fuel is called its calorific value.
    It is measured in units of energy per amount of material, e.g. kJ/kg.
  • Question 4
    1 / -0
    Which of the following options is not the characteristic of a good fuel?
  • Question 5
    1 / -0
    Which of the following options is not a constituent of LPG used in gas cylinders meant for domestic usage?
  • Question 6
    1 / -0
    Which of the following sources of energy, after refining, is also used as a fuel for jet airplanes?
    Solution
    Correct Answer: Kerosene
    Kerosene is product of refining of petroleum. It is used as a fuel for jet airplanes.
  • Question 7
    1 / -0
    Which of the following substances is used for extraction of iron from its ore?
    Solution
    Coke is a pure form of carbon and is used for the reduction of iron oxide to extract crude metal.
  • Question 8
    1 / -0
    Which of the following options is not a constituent of coal gas?
  • Question 9
    1 / -0
    Where is natural gas found in the ocean?
    Solution
    Natural gas is found in underground rocks called reservoirs. The rocks have tiny spaces in them (called pores) that allow them to hold water, natural gas and/or oil. The natural gas is trapped underground by impermeable rock (called caprock), and stays there until it is extracted.

  • Question 10
    1 / -0
    Which of the following substances has the highest calorific value?
    Solution
    Correct Answer: Anthracite
    Anthracite is the form of coal which has the highest carbon content and hence, the highest calorific value.
  • Question 11
    1 / -0
    Select the odd one among the fuels listed below.
    Solution
    Coal, petroleum and natural gas are fossil fuels but wood is not.
    Hence, option (1) is correct.
  • Question 12
    1 / -0
    Which of the following statements is not true regarding the luminous flame of coal gas?
    Solution
    Correct Answer: Absence of unsaturated hydrocarbons
    Coal gas is a mixture of hydrogen, methane, carbon monoxide, ethylene, acetylene, benzene, etc.
    Hence, the statement that coal gas is characterised by the absence of hydrocarbons is incorrect.

  • Question 13
    1 / -0
    Which of the following components does not vaporise during the fractional distillation of petroleum?
    Solution
    Fractional distillation is the process by which oil refineries separate crude oil into different, more useful hydrocarbon products based on the difference in their boiling points in the distillation tower. Bitumen (asphalt) is the non-volatile residue left after the fractional distillation of petroleum.
  • Question 14
    1 / -0
    Vaseline used as a cosmetic is produced by
    Solution
    'Vaseline' belongs to the class of petrochemicals and is a product of fractional distillation of petroleum.
  • Question 15
    1 / -0
    The crude oil obtained from earth is called
    Solution

    Option: 1

    Petroleum companies extract crude oil from the Earth using a perforation in the Earth`s surface called an oil well. Crude oil is a liquid form of petroleum.

  • Question 16
    1 / -0
    Which of the following resources is an inexhaustible natural resource?
    Solution
    Sunlight is available in abundance and its availability is not affected by its use.
    Hence, it is an inexhaustible natural resource.
  • Question 17
    1 / -0
    Which of the following forms of carbon is used in the manufacture of steel?
    Solution
    Steel is an alloy of iron and carbon (coke). Coke is obtained during the destructive distillation of coal.
  • Question 18
    1 / -0
    What are the most suitable temperature and pressure conditions for the formation of petroleum?
    Solution
    The most suitable temperature and pressure conditions for the formation of petroleum is high temperature and high pressure.
  • Question 19
    1 / -0
    Which of the following tips is incorrect as per PCRA?
  • Question 20
    1 / -0
    Which of the following options correctly states the full form of CNG?
    Solution

    Option 1
    Compressed Natural Gas (CNG) is a fuel source that is made from compressing natural gas to less than 1% of its standard atmospheric volume. The use of natural gas as a vehicle fuel was first introduced in the late1800s, with the first Natural Gas Vehicle (NGV) patented in the US.

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