The substance preserved under water is
potassium
sodium
red phosphorus
white phosphorus
Correct Answer :
D. white phosphorus
Related Questions
The metal which reacts most violently with cold water is
calcium
sodium
magnesium
potassium
The depletion of the ozone layer in the upper atmosphere is due to -extensive use of
dichloro-phenoxy-acetic acid
superphosphate of lime
chlorofluorocarbons (CFC)
dichloro-diphenyl-trichloro-ethane
The main element used in the vulcani-sation of rubber is
nickel
copper
sulphur
graphite
Marble is
calcium carbonate
sodium carbonate
magnesium sulphate
ferric chloride
Which or the following is not a constituent or gun powder?
Ammonium nitrate
Nitre
Charcoal powder
Sulphur
Water has an unusually high bolling point because
its molecular weight is low
it is denser than ice
it is a good solvent for many ionic substances
the molecules of water are joined by hydrogen bonds
Nylon is made from
terephthalic acid and ethylene glycol
hexamethylene diamine and adipic acid
cellulose nitrate
cellulose acetate
Which of the following cannot be used for the preparation of soap?
oleic acid
acetic acid
palmitic acid
stearic acid
The foul odour of gasoline is due to
pyridine
hydrogen sulphide
cacodyl
carbylamines
The earliest known acid is
nitric acid
oxalic acid
carbonic acid
acetic acid
Calamine is a ore of
tine
magnesium
zinc
copper
Invar, used for making pendulums is an alloy of steel with
tungsten
nickel
manganese
chromium
Smelling salt contains
ammonium chloride
ammonium carbonate
ammonium sulphate
potassium nitrate
Compounds of nitrogen with metals are called
nitrates
nitrites
hyponitrates
nitrides
An important use of nitrous acid is in
the manufacture of explosives
the manufacture of dyes
refrigerators
the preparation of drugs
Argyrol used as eye ointment is a solution of
hydrogen peroxide
silver nitrate
tincture iodine
m-cresol
The term 'nucleons' apples to
neutrons
protons
protons and neutrons
protons and electrons
Mild steel contains
iron with very low percentage of carbon
iron with high percentage of carbon
iron and chromium
iron and manganese
Carbogen is used in
CO2 poisoning
CO poisoning
phosgene poisoning
anesthesia
Which among the following is a local anaesthetic?
Chloroform
Morphine
Streptomycin
Cocaine
Which of the following process involves removal of the elements of water?
Hydrolysis
Hydrogenation
Dehydration
Dehydrogenation
The discoverer of chloroform was
Liebig
Pasteur
Bunsen
Erlenmeyer
The freezing point of water at 760 mm pressure is
273 K
0 K
273°C
-273°C
A non-material kind of pollution is
land pollution
air pollution
noise pollution
water pollution
The scientist associated with the discovery of the nucleus was
Rutherford
Moseley
Niels Bohr
J.J. Thomson
An essential condition for rusting is
high temperature
light
moisture
dry air
Which of the following is used in fuel to propel rockets?
Petrol
Kerosene
Hydrazine
Alcohol
Gases have
a definite shape but not volume
a definite volume and shape
a definite volume but not shape
neither definite volume nor shape
Lead soaps are used in
shaving creams
adhesive tapes
toilet powders
lubricants
A mixture of naphthalene and sand is separated by
evaporation
using a magnet
sublimation
sedimentation