Which one of the following is not radioactive?
Astatine
Francium
Tritium
Zirconium
Correct Answer :
D. Zirconium
Related Questions
The term 'nucleons' apples to
neutrons
protons
protons and neutrons
protons and electrons
A metal which occurs 'free' in nature is
gold
zinc
tin
molybdenum
Alum is used
as an analgesic
in the purification of water
as a fertilizer
as a disinfectant
BHC is a
Rodenticide
Herbicide
Pesticide
Fungicide
The flux added in the blast furnace is
Limestone
FeO
SiO2
MgO
Burglar proof safes are made of
Tungsten steel
Manganese steel
Chromium steel
Nickel steel
Soda-water contains
sodium bicarbonate
sodium carbonate
carbonic acid
sodium hydroxide
The noble gas which is present in microscopic quantities in air is
xenon
krypton
argon
helium
A mixture of naphthalene and sand is separated by
evaporation
using a magnet
sublimation
sedimentation
Artificial diamonds were produced by
Moissan
Davy
Faraday
Marie Curie
The substance preserved under water is
potassium
sodium
red phosphorus
white phosphorus
Which of the following is used as a food preservative?
phenol
washing soda
absolute alcohol
vinegar
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
Which of the following is an essential constituent of acids?
Oxygen
Nitrogen
Hydrogen
Chlorine
Which of the following can absorb gases quickly?
Activated charcoal
Anthracite coal
Diamond
Graphite
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
Stainless steel contains steel and
manganese
vanadium
nickel
chromium
A compound of carbon used as anaesthetic is
carbon disulphide
carbon tetrachloride
phosgene
chloroform
Bordeaux mixture contains
copper sulphate and water
copper sulphate, lime and water
thio-urea and lime
copper sulphate and thio-urea
Mortar contains cement and sand in the ratio of
1 : 1
1 : 2
2 : 3
1 : 3
The depletion of the ozone layer in the upper atmosphere is due to -extensive use of
dichloro-phenoxy-acetic acid
superphosphate of lime
chlorofluorocarbons (CFC)
dichloro-diphenyl-trichloro-ethane
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
Which of the following process involves removal of the elements of water?
Hydrolysis
Hydrogenation
Dehydration
Dehydrogenation
Vinegar is an aqueous solution of
oxalic acid
citric acid
acetic acid
hydrochloric acid
Dry Ice is
solid carbon dioxide
liquid oxygen
liquid hydrogen
liquid. Chlorine
Which among the following is a solid non-metal?
chlorine
mercury
water
iodine
Cupellation is used in the purification of
Lead
Tin
Silver
Gold
A form of carbon which is a good lubricant is
diamond
coke
graphite
charcoal
Which of the following is not a characteristic of potable water?
It must be free from suspended impurities
It must be free from harmful bacteria
It must contain traces of sodium bicarbonate
It must have a fishy odour
Gasoline is obtained from crude petroleum by
fractional distillation
fractional crystallisation
sublimation
evaporation