Which of the following can absorb gases quickly?
Activated charcoal
Anthracite coal
Diamond
Graphite
Correct Answer :
A. Activated charcoal
Related Questions
In the mouth, starch is converted into ______ by the action of saliva.
sucrose
glucose
fructose
mannose
A metal which occurs 'free' in nature is
gold
zinc
tin
molybdenum
Which one of the following is used for dry cleaning?
Kerosene oil
Diesel oil
Lubricating oil
Petroleum ether
The compound or nitrogen used in dry cells is
ammonia
ammonium nitrate
ammonium chloride
ammonium nitrite
A substance used both as an explosive and as a germicide is
phenol
TNT
picric acid
iodoform
An important use of nitrous acid is in
the manufacture of explosives
the manufacture of dyes
refrigerators
the preparation of drugs
A drug that is usually administered for malaria is
sulphanilamide
quinine
methicillin
novocaine
Grape sugar is another name for
glucose
fructose
sucrose
maltose
The flux added in the blast furnace is
Limestone
FeO
SiO2
MgO
The substance preserved under water is
potassium
sodium
red phosphorus
white phosphorus
The Long Form of the Periodic Table is based on
atomic number
valency
atomic mass
atomic radius
The form of carbon used in decolourising sugar solution is
wood charcoal
animal charcoal
coconut charcoal
lamp black
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'
Even as early as 3000 BC glass was known to the
Europeans
Egyptians
Asians
Americans
Lead pencils contain
white lead
graphite
red lead
coke
Marble is
calcium carbonate
sodium carbonate
magnesium sulphate
ferric chloride
Graphite la a good conductor of electricity because
it is an allotrope of carbon
it gives CO2 on heating
it contains free electrons
it is oxidised to graphitic acid
Petroleum ether is also known as
kerosene
naphtha
lubricating oil
asphalt
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
Refined petroleum is decolourised by
manganese dioxide
bauxite
animal charcoal
quicklime
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 best specimen for drinking purposes is
rain water
river water
conductivity water
deep well water
A valuable by-product in the manufacture of soap is
stearic acid
sodium hydroxide
palmitic acid
glycerol
Which among the following is a solid non-metal?
chlorine
mercury
water
iodine
Lead soaps are used in
shaving creams
adhesive tapes
toilet powders
lubricants
Rayon la made from
cotton
wool
cellulose
silk
Copper is purified by
poling
tempering
calcination
galvanising
The alloy which is extremely hard and resistant to acids is
chrome steel
silicon steel
stainless steel
invar
Which one of the following metals is used to extract another metal?
Lead
Tin
Zinc
Aluminium
Ascorbic acid is the chemical name for
Vitamin B6
Vitamin C
Vitamin K
Vitamin D