The most abundant constituent in air is
hydrogen
nitrogen
oxygen
noble gases
Correct Answer :
B. nitrogen
Related Questions
The gas which has a faint sweet odour is
nitrogen
nitrous oxide
nitric oxide
nitrogen peroxide
The soaps used in shaving cream are
calcium soaps
lead soaps
soft soaps
hard soaps
Artificial diamonds were produced by
Moissan
Davy
Faraday
Marie Curie
Which one of the following gases is extremely soluble in water?
Carbon dioxide
Ammonia
Chlorine
Hydrogen sulphide
Which of the following is not an antibiotic?
streptomycin
terramycin
aureomycin
codein
A mixture of carbon monoxide and hydrogen is
coal gas
producer gas
water gas
gobar gas
Which or the following gases is soluble in water and Is collected by the downward displacement or air?
Carbon dioxide
Sulphur dioxide
Ammonia
Hydrogen
The percentage of silver in German silver is
ten
twenty
zero
fifty
Annealing of glass is carried out by
rapid cooling
rapid heating
slow cooling
slow heating
Two or more entirely different compounds having the same molecular formula are known as
isobars
isotopes
isomorphs
isomers
Vinegar is an aqueous solution of
oxalic acid
citric acid
acetic acid
hydrochloric acid
The foul odour of gasoline is due to
pyridine
hydrogen sulphide
cacodyl
carbylamines
The raw materials required for the manufacture of glass are
silica, sodium nitrate and soda ash
silica, limestone and sodium nitrate
silica, sodium oxide and limestone
silica, soda ash and limestone
Penicillin was discovered by
Alexander Fleming
Sir JJ Thomson
Dr Nessler
Sir John Russel
Which of the following is used in fuel to propel rockets?
Petrol
Kerosene
Hydrazine
Alcohol
A substance used both as an explosive and as a germicide is
phenol
TNT
picric acid
iodoform
The purest form of carbon is
animal charcoal
coal
wood charcoal
sugar charcoal
Which of the following is not a chemical change?
Rusting of iron
Burning of magnesium
Sublimation of iodine
Electrolysis of water
LSD is
an anaesthetic
a psychedelic drug
an antipyretic
an antibiotic
Burglar proof safes are made of
Tungsten steel
Manganese steel
Chromium steel
Nickel steel
If people sleep in closed rooms where charcoal fire is burning, they die due to
carbon monoxide
carbon dioxide
methane
phosgene
The kinetic energy of gas molecules
is unaffected by temperature variations
decreases with increase of temperature
increases with decrease of temperature
increases with increase of temperature
Mild steel contains
iron with very low percentage of carbon
iron with high percentage of carbon
iron and chromium
iron and manganese
Which of the following process involves removal of the elements of water?
Hydrolysis
Hydrogenation
Dehydration
Dehydrogenation
Which among the following is a solid non-metal?
chlorine
mercury
water
iodine
Brass contains
copper and tin
aluminium and magnesium
copper and zinc
copper, tin and zinc
Sulphur is readily soluble in
Water
Alcohol
Carbon-di-sulphide
Sodium chloride solution
In surgical operation, the anaesthetic commonly used nowadays is
iodoform
chloroform
nitrous oxide-ether mixture
chloroform-nitrous oxide mixture
Iodine in alcohol is known as
quick lime
tincture iodine
rectified spirit
None of these
The non-metal which is electropositive is
chlorine
nitrogen
sulphur
hydrogen