Cinnabar is an ore of
lead
zinc
mercury
chromium
Correct Answer :
C. mercury
Related Questions
A light alloy having high tensile strength is
German silver
solder
magnalium
bell metal
Which of the following is called 'the King of Chemicals?
Nitric acid
Hydrochloric acid
Silver nitrate
Sulphuric acid
Gasoline is obtained from crude petroleum by
fractional distillation
fractional crystallisation
sublimation
evaporation
A metal which occurs 'free' in nature is
gold
zinc
tin
molybdenum
Cholesterol is
a carbohydrate
a protein
a lipid
a hormone
The neutron was discovered by
Chadwick
Madam Curie
Becquerel
Aston
Methylated spirit is a mixture of
methyl alcohol and acetic acid
methyl alcohol and ethyl alcohol
ethyl alcohol and pyridine
methyl alcohol and pyridine
Phosgene is a compound of
red phosphorus and oxygen
white phosphorus and oxygen
carbon monoxide and chlorine
carbon dioxide and chlorine
Which of the following represents a physical change?
sublimation
oxidation
reduction
decomposition
The compounds produced by plants in the process of photosynthesis are
carbohydrates
proteins
salts
fats
A substance used both as an explosive and as a germicide is
phenol
TNT
picric acid
iodoform
The process that takes place in the atom bomb is
nuclear' fusion
radioactive disintegration
nuclear fission
chemical decomposition
A non-material kind of pollution is
land pollution
air pollution
noise pollution
water pollution
Which of the following is not a physical change?
Distillation of water
Action of heat on potassium chlorate
Powdering of glass
Burning of an electric lamp
During fermentation, the by-product is
ethyl alcohol
methyl alcohol
carbon monoxide
carbon dioxide
The commonest ore of aluminium is
cryolite
bauxite
malachite
azurite
BHC is a
Rodenticide
Herbicide
Pesticide
Fungicide
The noble gas which is present in microscopic quantities in air is
xenon
krypton
argon
helium
Stainless steel contains steel and
manganese
vanadium
nickel
chromium
Galvanised iron sheets are protected from rusting due to the presence of a layer of
lead
chromium
zinc
tin
The substance most abundantly found in sea water is
magnesium chloride
sodium chloride
calcium sulphate
potassium chloride
Invar, used for making pendulums is an alloy of steel with
tungsten
nickel
manganese
chromium
Brass contains
copper and tin
aluminium and magnesium
copper and zinc
copper, tin and zinc
LSD is
an anaesthetic
a psychedelic drug
an antipyretic
an antibiotic
The scientist who synthesised the first organic compound (urea) in the laboratory was
Wohler
Dalton
Lavoisier
Fischer
Concrete is a mixture of
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
The formula for cane sugar is
C6H12O6
C2H5OH
C12H22O11
C7H8O
A compound used both as a fungicide and as a disinfectant is
chlorine
carbon monoxide
sulphur dioxide
o-cresol
Hard water does not lather well with soap because
it contains carbonates of calcium and magnesium
it contains sodium chloride
it is highly coloured
it contains suspended impurities
The addition of a neutron to the nucleus of an atom
increases the atomic mass of the atom
decreases the atomic mass of the atom
increases the charge on the nucleus
decreases the charge on the nucleus