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Worksheetsstructure of atom
Total questions: 15
Worksheet time: 10mins
Breaking of water molecules to get its constituent elements by passing electric current through it, is called
combination reaction
decomposition reaction
neutralization
The valency of sulphate group is
2
4
8
The chemical formula of aluminium is
(a)
Which gas is liberated when Zinc reacts with hydrochloric acid
no gas
hydrogen
chlorine
The number of atoms present in the molecules of an element is called
formula
atomicity
valency
The nucleus of an atom is made up of which subatomic particles
neutron
proton
electron
Which subatomic particle has a positive charge?
(a)
Matter is made up of atoms
true
false
The negatively charged particle is
proton
neutron
electron
The number of atoms of hydrogen that combines with nitrogen atom in one molecule of ammonia
(a)
Yes, because number of atoms on LHS is equal to number of atoms on RHS
No as the oxygen is not balanced
Yes because only carbon is balanced
The equation shown is the equation of photosynthesis
yes
no
Chemical formula for mercury
(a)
Nitrogen has variable valency
false
true
The most element in the earth's crust is
oxygen
nitrogen
silicon
