Basic Concepts - 8
1.
Normally in gaseous state the distance between molecules is __________ times greater than their diameter.
a) 400 items
b) 200 items
c) 300 items
d) 100 items
2.
22.414 dm
3
of every gas have ________ number of molecules but __________ masses.
a) Combustion analysis
b) Gram ion or One mole of ions
c) same, different
d) Relative abudance of ions
3.
Smallest particle of an element which may or may not have an independent existence is called.
a) A Molecule
b) an electron
c) An ion
d) An atom
4.
Swedish chemist J. Berzelius determined the.
a) Atomic density.
b) Atomic No.
c) Atomic weight
d) Atomic volume
5.
The number of atoms present in a molecule determine its.
a) acidity
b) basicity
c) Molecularity
d) atomicity.
6.
When an electron is added to a unipositive ion, we get.
a) Neutral atom
b) Molecule
c) Cation
d) An ion
7.
CO
+
is an example of
a) Anionic molecular ion
b) free radical
c) cationic molecular ion
d) stable molecule
8.
Relative atomic mass is the mass of an atom of an element as compared to the mass of
a) Hydrogen
b) Carbon
c) Nitrogen
d) Oxygen
9.
Isotopes are sister atoms of same element with similar chemical properties but different
a) Atomic Weight
b) Atomic number
c) Atomic volume
d) Atomic structure
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