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Subject: Chemistry, asked on 22/11/16

How will you seperate benzene and toluene if their boilng point difference is less than 30 degree centigrate? Define the principal behind this process.

Subject: Chemistry, asked on 21/10/16

if mixed, iron and sulphur form a mixture, but heated form a compound. how are the mixture and compound so formed, identified?

Subject: Chemistry, asked on 21/10/16

classify the following as elements , mixtures and compounds :
sugar , marble, distilled water , paint , tap water, alcohol, bread, brass, nitre ,washing soda, soap, air, mercury, wax, rust, sea water.

Subject: Chemistry, asked on 21/10/16

name a mixture used : (a) by all living things (b) in construction of buildings (c) as a food

Subject: Chemistry, asked on 21/10/16

how will you justify that the following are compounds and not elements : (a) sugar (b) water (c) iron sulphide.

Subject: Chemistry, asked on 21/10/16

properties of a compound are entire different from the properties of the elements it is made of. give an example.

Subject: Chemistry, asked on 20/10/16

name two elements that show exception to the properties of : (a) metals  (b) non metals

Subject: Chemistry, asked on 20/10/16

give the main classification of elements. mention at least two examples of each type.

Subject: Chemistry, asked on 20/10/16

name the following:-
(a) a gas filled in electric bulbs
(b) a non metal used to make electrodes

Subject: Chemistry, asked on 12/10/16

what do the following symbol stand for - (i) 2H (ii) H2.

Subject: Chemistry, asked on 27/9/16

NAME THE METHOD OF SEPARATION: 1)Chloroform and water 2)nitrogen and carbon dioxide 3)mixture of chalk and water
 

Subject: Chemistry, asked on 27/9/16

A strip of iron is placed in four different colourless salt solutions.They are potassium nitrate,silver nitrate,calcium nitrate and copper nitrate.Which one of the solutions will finally turn green?Justify your answer

Subject: Chemistry, asked on 22/9/16

How can we obtain hydrogen from a mixture of hydrogen and oxygen?Kindly explain.

Subject: Chemistry, asked on 10/8/16

What is a salt? Pls explain its formation in detail.

Subject: Chemistry, asked on 24/7/16

what is the test for chlorine?

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