Vulcanisation was discovered by
Goodyear
Wohler
Baeyer
Perkin
Correct Answer :
A. Goodyear
Related Questions
The Long Form of the Periodic Table is based on
atomic number
valency
atomic mass
atomic radius
Calomel is
lead chloride
mercurous chloride
mercuric chloride
calcium sulphate
In the making of jewels, gold is usually mixed with
zinc
tin
copper
aluminium
The percentage of silver in German silver is
ten
twenty
zero
fifty
Ozone is an allotrope of Oxygen, containing ______ atom/s of oxygen per molecule instead of two.
three
four
one
five
Graphite la a good conductor of electricity because
it is an allotrope of carbon
it gives CO2 on heating
it contains free electrons
it is oxidised to graphitic acid
During fermentation, the by-product is
ethyl alcohol
methyl alcohol
carbon monoxide
carbon dioxide
Which of the following is used as an illuminant?
Gasoline
Benzoline
Kerosene
Petroleum ether
Which or the following is not a constituent or gun powder?
Ammonium nitrate
Nitre
Charcoal powder
Sulphur
Argyrol used as eye ointment is a solution of
hydrogen peroxide
silver nitrate
tincture iodine
m-cresol
Galvanised iron sheets are protected from rusting due to the presence of a layer of
lead
chromium
zinc
tin
Brine is a solution of
sodium chloride in water
iodine in alcohol
sulphur in carbon disulphide
Potassium iodide in water
Tincture iodine is a solution of
iodine in potassium iodide
iodine in alcohol
iodine in water
iodine in carbon disulphide
The compound used in photography is
ammonium dichromate
copper Sulphate
magnesium Sulphate
sodium thiosulphate
Solder is an alloy of
tin and copper
tin and lead
tin and zinc
tin, copper and zinc
When ants bite, they inject
glacial acetic acid
methanol
formic acid
stearic acid
A substance used both as an explosive and as a germicide is
phenol
TNT
picric acid
iodoform
Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to
dehydration
oxidation
reduction
dehydrogenation
Which of the following is used in fuel to propel rockets?
Petrol
Kerosene
Hydrazine
Alcohol
Rooms in places infected by plague are disinfected using
bleaching powder
iodoform
sulphur dioxide
chlorine
Solid carbon dioxide is used
as a drying agent
as a refrigerant
as an antiseptic
as a bleaching agent
White lead is
a basic salt
an acid salt
a double salt
a normal salt
Which of the following is an essential constituent of acids?
Oxygen
Nitrogen
Hydrogen
Chlorine
Hypo' is
sodium nitrate
Potassium nitrate
sodium thiosulphate
ammonium chloride
Metals are usually heavy. A light metal is
manganese
copper
potassium
plumbum
A compound used both as a fungicide and as a disinfectant is
chlorine
carbon monoxide
sulphur dioxide
o-cresol
Oil of winter green contains
acetone
ether
acetic acid
methyl salicylate
A hormone which contains iodine is
adrenalin
glucagon
epinephrin
thyroxin
The commonest ore of aluminium is
cryolite
bauxite
malachite
azurite
Ascorbic acid is the chemical name for
Vitamin B6
Vitamin C
Vitamin K
Vitamin D