The LPG cooking gas contains propane and butane as the constituen

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 Multiple Choice QuestionsMultiple Choice Questions

101.

When one strikes a safety match, the first step is:

  • burning of sulphur

  • decomposition of potassium chlorate into potassium chloride and oxygen

  • conversion of a small amount of red phosphorus into white phosphorus

  • burning of glue and starch


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102.

The LPG cooking gas contains propane and butane as the constituents. A sulphur containing compound is added to the LPG, because:

  • it lowers the cost of production

  • it enhances the efficiency of LPG

  • it facilitates easy detection of leakage of the gas

  • it assists in liquefying hydrocarbons


C.

it facilitates easy detection of leakage of the gas

LPG is prepared by refining petroleum or 'wet' natural gas, and is almost entirely derived from fossil fuel sources, being manufactured during the refining of petroleum (crude oil), or extracted from petroleum or natural gas streams as they emerge from the ground.


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103.

Match List-I with List-II

List I (Element)

  1. Sulphur
  2. Phosphorus
  3. Lead
  4. Silver

List II (Highest Valency)

  1. Five
  2. Six
  3. Two
  4. Four

  • (a) - 2, (b) - 4, (c) - 1, (d) - 3

  • (a) - 2, (b) - 1, (c) - 4, (d) - 3

  • (a) - 3, (b) - 1, (c) - 4, (d) - 2

  • (a) - 3, (b) - 4, (c) - 1, (d) - 2


104.

Which one of the following species is not capable of showing disproportionation reaction?

  • CIO-

  • CIO2-

  • CIO3-

  • CIO4-


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105.

Combination of one volume of nitrogen with three volumes of hydrogen produces

  • one volume of ammonia

  • two volumes of ammonia

  • three volumes of ammonia

  • one and a half volumes of ammonia


106.

The setting time of cement is lowered by adding:

  • oxides of aluminium

  • gypsum

  • oxides of magnesium

  • silica


107.

Emulsion is known as a:

  • colloidal solution of substances having different physical states

  • true solution

  • distillation mixture for making alcohols

  • colloidal solution of two liquids


108.

If one mixes up ashes with animal fat, the substance received in the crude form is called:

  • Pheromone

  • Soap

  • Cement

  • Concrete


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109.

Which one of the following gases gives acidic solution on dissolving in water?

  • Hydrogen

  • Carbon dioxide

  • Nitrogen

  • Oxygen


110.

How many moles of hydrogen atom are present in one mole of Aluminium hydroxide?

  • One mole

  • Two moles

  • Three moles

  • Four moles


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