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WHAT IS formula
a representation of a substance using symbols(alphabetic ior numerc) for its constituent elements
a conventionalized statement expressing some fundamental principle

write the formula of ammonium hydroxide
NH4OH
NH30H

write the nature of ammonium hydroxide just after the reaction
white light is produced
sparkling sounds are produced
dense white fumes are seen

the first instrumental analysis was flame emissive spectrometry . who developed it?
Robert Bunsen and Gustav Kirchhoff
Justus von Liebig and Robert Bunsen
Joseph Priestley and August Kekulé

write the symbols of following ?caesium?rubidium?alumunium
Cz,Rb,An
Cs,Rd,Al
Cs,Rb,Al

write the colours of ferrous ion and ferric ion
pale green and brown
reddish brown and dirty green
orange and dirty green
dirty green and reddish brown

write the at.masses of Al,Ca
40,35.5
27,40
35.5,40
32,40

what is a mole
1mole=gm.molecular mass
1 mole occupies 22.4 l at S.T.P
both the above

what was the first discovered organic dye
carbamide
Perkin's mauve
quinine
terpiniol

what were the first discoveries in chemistry in 1000B.C
medicine drugs dye
soap napkins handkerchiefs
soap glass alloys like bronze etc

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Discussion

Talha

can we give chapter wise test?

1720 days 12 hours ago

Suresh Sunke

answers!

2444 days 12 hours 21 minutes ago

Bhargav Naidu

cant we get the answers for the questions in the exam

2463 days 13 hours 38 minutes ago

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