Click the correct answer (True or False).
Click the correct answer.
Which of the following scientists proved that air is a mixture of gases?
Jean-Antoine Chaptal
Daniel Rutherford
Antoine Lavoisier
J.J. Thomson
Which of the following is used as a rocket propellant?
Carbogen
A mixture of oxygen and nitrous oxide
A mixture of oxygen and sulphur dioxide
Liquid oxygen
Which of the following is an important constituent of proteins that are necessary for the growth of plants and animals?
Argon
Carbon dioxide
Nitrogen
Krypton
Carbon dioxide is not added to the atmosphere by which of the following processes?
Respiration
Combustion of fossil fuels
Volcanic eruptions
Photosynthesis
Click the correct answer.
is the process of depositing a thin layer of zinc metal on iron objects.
Galvanisation
Corrosion
Plating
Oxidation
Metallic oxides are
in nature.
volatile
basic
rampant
violent
is an essential component of proteins and amino acids.
Oxygen
Zinc
Iron
Nitrogen
The process of conversion of free atmospheric nitrogen into usable compounds is called
.
oxygen fixation
nitrogen conversion
nitrogen fixation
nitrogen composition
When nitrogen reacts with rainwater, it forms
.
nitrogen dioxide
nitrogen sulphide
nitric acid
nitrogen disulphate
present in the soil convert the nitrates present in the animal waste into atmospheric nitrogen.
Roots
Bacteria
Rocks
Water
Carbon dioxide is released when
is used in the manufacture of bakery items.
baking soda
oxygen
carbon
water
Carbon monoxide on combining with haemoglobin forms
.
boxyhaemoglobin
carboxyhaemoglobin
mono haemoglobin
carboxy
of fuels like coal, petrol and diesel may release heavy metals like lead, copper and cadmium in the air.
Formation
Adsorbtion
Absorbtion
Combustion
