The metal which reacts most violently with cold water is
calcium
sodium
magnesium
potassium
Correct Answer :
D. potassium
Related Questions
The pH or pure water is nearly 7.0 It will increase on the addition or
hydrochloric acid
ammonia
cane sugar
common salt
The purest form of carbon is
animal charcoal
coal
wood charcoal
sugar charcoal
The term 'nucleons' apples to
neutrons
protons
protons and neutrons
protons and electrons
Which of the following process involves removal of the elements of water?
Hydrolysis
Hydrogenation
Dehydration
Dehydrogenation
Dry Ice is
solid carbon dioxide
liquid oxygen
liquid hydrogen
liquid. Chlorine
The main constituent of gobar gas is
methane
nitrogen
carbondioxide
ethylene
LSD is
an anaesthetic
a psychedelic drug
an antipyretic
an antibiotic
Which of the following cannot be used as fuel?
Gasoline
Kerosene
Sulphuric acid
Alcohol
Galvanised iron sheets are protected from rusting due to the presence of a layer of
lead
chromium
zinc
tin
Invar, used for making pendulums is an alloy of steel with
tungsten
nickel
manganese
chromium
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
Tincture iodine is
a disinfectant
an analgesic
a hypnotic
a dye
Mild steel contains
iron with very low percentage of carbon
iron with high percentage of carbon
iron and chromium
iron and manganese
Real gases tend to become ideal Under
low pressure and high temperature
low pressure and low temperature
high pressure and low temperature
high pressure and high temperature
High temperature thermometers use
sodium amalgam
an alloy of sodium and potassium
silver amalgam
calcium amalgam
The simplest hydrocarbon is
benzene
methane
ethane
butane
An important use of nitrous acid is in
the manufacture of explosives
the manufacture of dyes
refrigerators
the preparation of drugs
The earliest name given to nitrogen was
dephlogisticated air
azote
inflammable air
marine acid air
Triple Antigen treatment for children is to ward off
whooping cough
tetanus
diphtheria
All the three
Plastics are synthetic
rubbers
fibres
resins
sugars
A valuable by-product in the manufacture of soap is
stearic acid
sodium hydroxide
palmitic acid
glycerol
A compound of carbon used as anaesthetic is
carbon disulphide
carbon tetrachloride
phosgene
chloroform
The value of Avogadro Number is
6.023 x 1022
1 x 10-14
cl 6.056 x 10-6
6.023 x 1023
Which or the following electrolysis?
Aluminium
Copper
Zinc
Iron
Which of the following is not a metal?
Lithium
Helium
Sodium
Cobalt
The formula for cane sugar is
C6H12O6
C2H5OH
C12H22O11
C7H8O
Calomel is
lead chloride
mercurous chloride
mercuric chloride
calcium sulphate
The compound which is both an antiseptic and a disinfectant is
phenol
iodoform
bleaching powder
blue vitriol
A mixture of carbon monoxide and hydrogen is
coal gas
producer gas
water gas
gobar gas
A non-metal which is a good conductor or heat and electricity is
iodine
sulphur
graphite
phosphorus