Click the correct answer (True or False).
Click the correct answer.
Which of the following is the lightest of all the gases?
Carbon dioxide
Hydrogen
Oxygen
Argon
Which of the following subatomic particles is/are not present in an atom of hydrogen?
Electron
Proton
Neutron
Both proton and neutron
Who gave the name ‘hydrogen’?
Henry Cavendish
Antoine Lavoisier
Paracelsus
None of these
Which of the following metals reacts violently with hydrogen?
Calcium
Magnesium
Iron
Sodium
The conductivity of water can be increased by adding which of the following?
A few drops of dilute sulphuric acid
A few pellets of zinc
Both dilute sulphuric acid and pellets of zinc
More water
Which of the following is not used as catalyst in the hydrogenation of oils?
Nickel
Platinum
Palladium
Sodium
Reduction reaction involve(s) which of the following?
Addition of oxygen
Addition of hydrogen
Removal of oxygen
Addition of hydrogen and removal of oxygen
Click the correct answer.
An atom of hydrogen consists of one
around which one electron revolves.
electron
neutron
proton
molecule
discovered the element hydrogen.
Henry Cavendish
Antoine Lavoisier
Niels Bohr
Robert Boyle
When electric current is passed through acidulated water, it dissociates into
and oxygen.
electricity
water
hydrogen
H2O
process is used to produce hydrogen on a large scale.
Haber’s
Bosch’s
Filtration
Distillation
is a mixture of carbon monoxide and hydrogen.
Hydrochloric acid
Hydrogen monoxide
Water gas
Carbon dioxide
Hydrogen burns in air with a
flame.
white
red
pale blue
green
The reaction of hydrogen with oxygen is highly
.
inflammable
endothermic
exothermic
explosive
The most important compound of hydrogen is
.
hydrochloric acid
water
hydrogen sulphate
hydrogen carbonate
Hydrogen combines with carbon to form compounds called
.
ammonia
hydrocarbons
hydrogen sulphate
hydrogen carbonate
