Valence NEET Questions

Inorganic Chemistry - Classification of Elements and Periodicity in Properties

Valence MCQ Questions


7.
If an atom's outermost shell is completely filled (a stable octet or duplet), the atom generally has a valency of:
A.
Eight
B.
One
C.
Zero
D.
Two
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ANSWER :
C. Zero
8.
If the number of electrons in the outermost shell of an atom is 4 or less, the valency of that element is generally equal to:
A.
Twice the number of valence electrons
B.
Half the number of valence electrons
C.
The number of valence electrons itself
D.
8 minus the number of valence electrons
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ANSWER :
C. The number of valence electrons itself
9.
If the number of electrons in the outermost shell of an atom is more than 4 (close to 8), the valency of that element is generally calculated as:
A.
The number of valence electrons plus 8
B.
8 minus the number of valence electrons
C.
Always equal to 8
D.
The number of valence electrons itself
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ANSWER :
B. 8 minus the number of valence electrons
10.
Mendeleev arranged the elements in his periodic table in order of increasing atomic mass and also considering the periodic recurrence of their:
A.
Isotopic composition
B.
Radioactivity
C.
Colour alone
D.
Physical and chemical properties, including valency
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ANSWER :
D. Physical and chemical properties, including valency
11.
Mendeleev classified elements based on their valency as reflected in the formulae of their hydrides and:
A.
Oxides
B.
Allotropes
C.
Radioactive decay products
D.
Isotopes
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ANSWER :
A. Oxides
12.
According to Mendeleev's classification, elements belonging to the same group generally showed:
A.
Completely different valencies
B.
Similar valency and similar chemical properties
C.
Identical atomic masses
D.
No relationship in properties at all
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ANSWER :
B. Similar valency and similar chemical properties