Advertisements
Advertisements
Question
Name one solid, one liquid and one gaseous non-metal.
Solution
Carbon is a solid non-metal, bromine is a liquid non-metal and oxygen is a gaseous non-metal.
APPEARS IN
RELATED QUESTIONS
The molecules can move freely anywhere in
Name the processes involved in two cases.
Name the terms for the change of a solid into liquid.
What is the scientific name of particles which make up mater?
Explain why steel is used to make railway lines.
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO4 to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
Milk of Magnesia is :
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
Name the process by which the various gases of the air are separated.
Name the process which can be used to purify an impure sample of copper sulphate.
How will you separate a mixture containing sand and sugar ?
How will you separate camphor, common salt and iron nails from their mixture ?
Explain how, nitrogen , oxygen and argon gases are separated from air.
The boiling point of liquid argon is :
Diffentiate between absorption and adsorption.
A teabag placed in a cup of hot water will diffuse into the water.
Define the term matter.
