Chemistry Based Questions
Question: 1
Mention the physical properties of sulphur dioxide?
It is a poisonous gas with suffocating smell.
It is denser than air.
It is neither combustible nor supporter of combustion.
It is readily soluble in water and forms acidic solution.
Question: 2
Mention the uses of aluminium?
It is used in making electric wires.
It is used in aluminium foils for packing and wrapping food stuffs and drugs.
Aluminium powder is used in making anticorrosion paints.
Alloys of aluminium are used in making parts of aircraft, buses.
Question: 3
Why are non metals electronegative in nature?
Non metals have five or more electrons in their valence shell, hence they have tendency to accept electrons and become electronegative.
Question: 4
Why is sulphuric acid called King of chemicals?
Sulphuric acid, is the most important chemical, used in the manufacture of large number of substances. Hence it is called as King of chemicals.
Question: 5
Give important uses of ammonia?
Used in the manufacture of fertilizers like urea.
Used in the manufacture of nitric acid by Ostwald’s process.
Used in the manufacture of washing soda by Solvay process.
Liquid ammonia is used as a refrigerant.
Question: 6
What is vulcanization?
Heating of natural rubber with sulphur to a definite temperature for a known period of time is known as vulcanization of rubber.
Question: 7
Mention the physical properties of ammonia?
It is a colourless gas with pungent smell.
It is lighter than water.
It is alkaline in nature and bring tears in eyes.
It is extremely soluble in water.
Question: 8
Metals act as good reducing agents. Why?
Metals are electropositive, ie. they have the tendency to donate electrons. Hence they act as electron donors, otherwise they act as reducing agents.
Question: 9
Give any four medicinal uses of sulphur?
It is used as a disinfectant, fungicide and germicide for destroying bacteria and fungi in plants.
It is used as antiseptic in skin ointments.
It is used in the preparation of sulpha drugs.
It is used in beauty parlours to give specific shapes to our hair.
Question: 10
What are amalgams?
Alloys of mercury with other metals are called amalgams.
Silver amalgam (Ag/Hg)
Tin amalgam (Sn/Hg)
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