The first organic compound prepared in the laboratory was
acetic acid
chloroform
urea
methane
Correct Answer :
C. urea
Related Questions
Copper is purified by
poling
tempering
calcination
galvanising
Temporary hardness is due to the presence of
calcium carbonate
calcium bicarbonate
magnesium sulphate
calcium sulphate
The foul odour of gasoline is due to
pyridine
hydrogen sulphide
cacodyl
carbylamines
Rusting is a special case of corrosion applied to
nickel
tin
iron
chromium
The earliest known acid is
nitric acid
oxalic acid
carbonic acid
acetic acid
Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to
dehydration
oxidation
reduction
dehydrogenation
Jeweller's rouge is
magnetic oxide of iron
ferric oxide
ferrous oxide
ferrous carbonate
Which of the following process involves removal of the elements of water?
Hydrolysis
Hydrogenation
Dehydration
Dehydrogenation
A substance used as a fire-extinguisher under the trade name of Pyrene is
carbon dioxide
chloroform
carbon tetrachloride
bleaching powder
A hormone which contains iodine is
adrenalin
glucagon
epinephrin
thyroxin
Which of the following is called 'the King of Chemicals?
Nitric acid
Hydrochloric acid
Silver nitrate
Sulphuric acid
Mortar contains cement and sand in the ratio of
1 : 1
1 : 2
2 : 3
1 : 3
Nylon is made from
terephthalic acid and ethylene glycol
hexamethylene diamine and adipic acid
cellulose nitrate
cellulose acetate
The rate of setting of cement is slowed down by the addition of
quicklime
gypsum
soda lime
bleaching powder
Solid carbon dioxide is used
as a drying agent
as a refrigerant
as an antiseptic
as a bleaching agent
Galvanising is the process of coating
iron with zinc
zinc with iron
copper with silver
silver with gold
Ethyl alcohol is
a deliquescent substance
an efflorescent substance
a hygroscopic substance
a dehydrating substance
The principle involved in dialysis, a treatment administered to patients with affected kidneys is
Cataphoresis
Osmosis
Dehydration
Diffusion
Lead pencils contain
white lead
graphite
red lead
coke
The form of carbon used in decolourising sugar solution is
wood charcoal
animal charcoal
coconut charcoal
lamp black
Sulphur is readily soluble in
Water
Alcohol
Carbon-di-sulphide
Sodium chloride solution
Vulcanisation was discovered by
Goodyear
Wohler
Baeyer
Perkin
In the common soda-acid fire extinguisher, the fire is put out by
acid fumes
sodium bicarbonate
carbon dioxide
sodium carbonate
Which one of the following is present in the largest amount in terms of per cent by mass in the earth's crust?
Silicon
Oxygen
Carbon
Calcium
The metal which reacts most violently with cold water is
calcium
sodium
magnesium
potassium
An example of thermo setting plastics is
bakelite
polythene
PVC
Teflon
Concrete is a mixture of
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
Cupellation is used in the purification of
Lead
Tin
Silver
Gold
In the process of purification of water for town supply, the substance used to remove bad smell and colour from water is
charcoal
bleaching powder
chlorine
carbolic acid
Water always contains hydrogen and oxygen in the ratio 1:8 by weight. This is in accordance with the
Law of Multiple Proportions
Law of Definite Proportions
Law of Conservation of Mass
Law of Reciprocal Proportions