Liquid air is heated and nitrogen comes out first because it has a lower boiling point than oxygen
johnmulu answered the question on February 6, 2017 at 05:38
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Give reason why concentrated sulphuric (VI) acid is not used to dry ammonia gas
(Solved)
a)Give reason why concentrated sulphuric (VI) acid is not used to dry ammonia gas
b) Name one suitable drying agent for ammonia gas
Date posted:
February 3, 2017
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Answers (1)
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State and explain the observations that would be made if a sample of sulphur is heated with concentrated nitric (V) acid
(Solved)
State and explain the observations that would be made if a sample of sulphur is heated with concentrated nitric (V) acid.
Date posted:
February 3, 2017
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Answers (1)
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Why is it advisable to obtain nitrogen from air instead of from ammonia
(Solved)
Why is it advisable to obtain nitrogen from air instead of from ammonia.
Date posted:
February 3, 2017
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Answers (1)
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Ethane gas was reacted with 1 mole of bromine gas. State one observation made during this reaction
(Solved)
Ethane gas was reacted with 1 mole of bromine gas. State one observation made during this reaction.
Date posted:
February 3, 2017
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Answers (1)
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State one source of alkanes
(Solved)
State one source of alkanes.
Date posted:
February 3, 2017
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Answers (1)
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State one use of polystyrene
(Solved)
State one use of polystyrene.
Date posted:
February 3, 2017
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Answers (1)
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A group of compounds called chlorofluorocarbons have a wide range of uses but they also have harmful effects on the environment. State..
(Solved)
A group of compounds called chlorofluorocarbons have a wide range of uses but they also have harmful effects on the environment. State one
a) use of chlorofluorocarbons
b) Harmful effect of chlorofluorocarbons on the environment
Date posted:
February 3, 2017
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Answers (1)
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Name two isomers of butene
(Solved)
Name two isomers of butene.
Date posted:
February 3, 2017
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Answers (1)
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What is meant by isomerism?
(Solved)
What is meant by isomerism?
Date posted:
February 3, 2017
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Answers (1)
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One of the reactions undergone by ethene is addition polymerisation. Give the name of the polymer
(Solved)
One of the reactions undergone by ethene is addition polymerisation.
Give the name of the polymer and one disadvantage of the polymer it forms.
Date posted:
February 3, 2017
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Answers (1)
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What is the name given to the smallest repeating unit of a polymer?
(Solved)
What is the name given to the smallest repeating unit of a polymer?
Date posted:
February 3, 2017
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Answers (1)
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State one industrial use of hydrogenation
(Solved)
State one industrial use of hydrogenation.
Date posted:
February 3, 2017
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Answers (1)
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Name the main constituent of natural gas and write an equation for its complete combustion
(Solved)
One of the fuels associated with crude oil is natural gas. Name the main constituent of natural gas and write an equation for its complete combustion.
Date posted:
February 3, 2017
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Answers (1)
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Give two use of bitumen
(Solved)
Give two use of bitumen
Date posted:
February 3, 2017
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Answers (1)
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What condition could cause a poisonous gas to be formed when kerosene is burnt?
(Solved)
What condition could cause a poisonous gas to be formed when kerosene is burnt? Explain
Date posted:
February 3, 2017
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Answers (1)
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Describe how solid sample of potassium sulphate can be prepared starting with 200 cm3 of 2M potassium hydroxide
(Solved)
Describe how solid sample of potassium sulphate can be prepared starting with 200 cm3 of 2M potassium hydroxide.
Date posted:
February 3, 2017
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Answers (1)
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State the Gay Lussac’s Law
(Solved)
Start the Gay Lussac’s Law.
Date posted:
February 3, 2017
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Describe how a sample of pure sodium sulphate crystals can be prepared
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Starting with 50 cm 3 of 2.8 M sodium hydroxide, describe how a sample of pure sodium sulphate crystals can be prepared.
Date posted:
February 3, 2017
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Answers (1)
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State why it is not advisable to wash vehicles using sea water
(Solved)
State why it is not advisable to wash vehicles using sea water.
Date posted:
February 3, 2017
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Answers (1)
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State the Boyle's law
(Solved)
State the Boyle's law.
Date posted:
February 3, 2017
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Answers (1)