Brass contains
copper and tin
aluminium and magnesium
copper and zinc
copper, tin and zinc
Correct Answer :
C. copper and zinc
Related Questions
Concrete is a mixture of
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
High temperature thermometers use
sodium amalgam
an alloy of sodium and potassium
silver amalgam
calcium amalgam
The ore of iron is
Dolomite
Magnetite
Bauxite
Anglesite
What is 'oxygen mixture'?
A mixture of potassium nitrate and carbon
A mixture of ammonium chloride and sodium nitrate
A mixture of potassium chlorate and manganese dioxide
A mixture of ammonium nitrate and charcoal
The pH or pure water is nearly 7.0 It will increase on the addition or
hydrochloric acid
ammonia
cane sugar
common salt
Grape sugar is another name for
glucose
fructose
sucrose
maltose
Compounds of nitrogen with metals are called
nitrates
nitrites
hyponitrates
nitrides
The flux added in the blast furnace is
Limestone
FeO
SiO2
MgO
Penicillin was discovered by
Alexander Fleming
Sir JJ Thomson
Dr Nessler
Sir John Russel
The foul odour of gasoline is due to
pyridine
hydrogen sulphide
cacodyl
carbylamines
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
The discoverer of chloroform was
Liebig
Pasteur
Bunsen
Erlenmeyer
Gold dissolves in aqua regia due to the formation of
chloro auric acid
auric chloride
gold nitrate
aurous chloride
The most abundant constituent in air is
hydrogen
nitrogen
oxygen
noble gases
A compound of carbon used as anaesthetic is
carbon disulphide
carbon tetrachloride
phosgene
chloroform
Nitrous oxide used as anaesthetic is usually mixed with
ethyl alcohol
chloroform
oxygen
methyl alcohol
Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because otherwise
it becomes coloured
it gets evaporated in air
it gets oxidised to phosgene
it gets decomposed to chloropicrin
Ozone occurs in the upper layers of air in the atmosphere because
it is lighter than air
in the lower layers it becomes unstable
ultra-violet light is present only in the upper layers
it mixes freely with O2 in the upper layers
Vulcanisation was discovered by
Goodyear
Wohler
Baeyer
Perkin
The name rubber was given by
Lavoisier
Priestley
Dalton
Avogadro
The compound which is both an antiseptic and a disinfectant is
phenol
iodoform
bleaching powder
blue vitriol
Lead pencils contain
white lead
graphite
red lead
coke
Glass articles are annealed so that
they may appear better
they can resist the action of acids and alkalies
they lose their brittleness
they can withstand temperature shocks
The function of nitrogen in air is
to make air a moderate supporter of combustion
to maintain the density of air constant
to prevent the hydrogen in air from exploding
to reduce the poisonous nature of ozone in air
Copper is purified by
poling
tempering
calcination
galvanising
The scientist associated with the discovery of the nucleus was
Rutherford
Moseley
Niels Bohr
J.J. Thomson
The compound of iron used in the manufacture of blue-black ink is
ferric chloride
ferric sulphate
ferric thiocyanate
ferrous sulphate
Which of the following is baking soda?
Na2CO3 . 10H2O
NaHCO3
Na2CO3 . H2O
NH4CI
Apart from lead tetra-ethyl, the other compound used as antiknock is
n-heptane
n-octane
iso-heptane
iso-octane
Flint glass contains
potassium and lead silicates
zinc and barium borosilicates
potassium and calcium silicates
sodium and calcium silicates