Classification of Elements and Periodicity in Properties NDA Questions

NDA Chemistry

Classification of Elements and Periodicity in Properties MCQ Questions


13.
Elements having similar outer electronic configurations in their atoms are arranged in vertical columns, referred to as
A.
Groups
B.
Families
C.
Both a and b
D.
Periods
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ANSWER :
C. Both a and b
14.
IUPAC stands for
A.
International Union of Periodic and Applied Chemistry
B.
International Union of Pure and Applied Chemistry
C.
International Union of Periodic and Arithmetic Chemistry
D.
International Union of Pure and Arithmetic Chemistry
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ANSWER :
B. International Union of Pure and Applied Chemistry
15.
Mendeléev’s Periodic Table contains vertical columns called _____
A.
Atomicity
B.
Mass number
C.
Groups
D.
Periods
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ANSWER :
C. Groups
16.
As the effective nuclear charge acting on the valence shell electrons increases across a period, what will happen to the tendency to lose electrons?
A.
Add
B.
Leave
C.
Decrease
D.
Increase
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ANSWER :
C. Decrease
17.
Non-metals are _____ nature.
A.
Electropositive
B.
Electronegative
C.
Electromagnetic
D.
None of these
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ANSWER :
B. Electronegative
18.
Just like halogens, hydrogen also exists as _____ molecules and it combines with metals and non-metals to form covalent compounds.
A.
Triatomic
B.
Diatomic
C.
Monoatomic
D.
None of these
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ANSWER :
B. Diatomic