The raw materials used in the manufacture of cement are
brimstone and silica
limestone and clay
brimstone and clay
brimstone and limestone
Correct Answer :
B. limestone and clay
Related Questions
Vinegar is an aqueous solution of
oxalic acid
citric acid
acetic acid
hydrochloric acid
Which among the following is a metalloid?
Tin
Silver
Iodine
Arsenic
A compound of carbon used as anaesthetic is
carbon disulphide
carbon tetrachloride
phosgene
chloroform
Ozone is an allotrope of Oxygen, containing ______ atom/s of oxygen per molecule instead of two.
three
four
one
five
An example of thermo setting plastics is
bakelite
polythene
PVC
Teflon
PAS is a drug used In the treatment of
tuberculosis
cancer
typhoid
malaria
The atomic number of an element represents
number of neutrons in the nucleus
number of protons and neutrons in the nucleus
the valency of the element
number of protons in the nucleus
The non-metal which has a shining appearance is
sulphur
phosphorus
iodine
bromine
Which among the following gases present in the air discolours brass nameplates?
Hydrogen Sulphide
Nitrogen
Carbon-di-oxide
Oxygen
The form of carbon used in decolourising sugar solution is
wood charcoal
animal charcoal
coconut charcoal
lamp black
The most abundant noble gas present in air is
neon
argon
helium
krypton
Invert sugar is
sucrose
glucose
fructose
a mixture of glucose and fructose
Which of the following represents a physical change?
sublimation
oxidation
reduction
decomposition
The gas evolved when ammonium nitrate is heated is
nitrogen
nitric oxide
nitrogen peroxide
nitrous oxide
CAN is used as (Calcium Ammonium Nitrate)
an explosive
a fertilizer
a dye
a bleaching agent
Rain water collected after a shower la very pure because
the initial showers wash the atmosphere free from most of the impurities
it contains desirable salts like sodium chloride and ammonium nitrate
it dissolves the gases in the atmosphere like ozone which are good for health in small quantities
it is supposed to be 'heaven sent'
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
Ethyl alcohol is
a deliquescent substance
an efflorescent substance
a hygroscopic substance
a dehydrating substance
Refined petroleum is decolourised by
manganese dioxide
bauxite
animal charcoal
quicklime
The earliest name given to nitrogen was
dephlogisticated air
azote
inflammable air
marine acid air
Gasoline is obtained from crude petroleum by
fractional distillation
fractional crystallisation
sublimation
evaporation
The simplest hydrocarbon is
benzene
methane
ethane
butane
Methylated spirit is a mixture of
methyl alcohol and acetic acid
methyl alcohol and ethyl alcohol
ethyl alcohol and pyridine
methyl alcohol and pyridine
Lunar caustic is
calcium sulphate
ammonium chloride
caustic soda
silver nitrate
The neutron was discovered by
Chadwick
Madam Curie
Becquerel
Aston
Even as early as 3000 BC glass was known to the
Europeans
Egyptians
Asians
Americans
The flux added in the blast furnace is
Limestone
FeO
SiO2
MgO
Boiler scales' contain
calcium carbonate
magnesium bicarbonate
calcium sulphate
magnesium sulphate
A metal which exhibits allotropy is
cobalt
tin
manganese
platinum
The most abundant constituent in air is
hydrogen
nitrogen
oxygen
noble gases