Question

According to the law of triads,

A. the properties of the middle element were in between those of the other two members  
B. three elements arranged according to increasing weights have similar properties
C. the elements can be grouped in the groups of six elements
D. every third element resembles the first element in periodic table
Answer :   the properties of the middle element were in between those of the other two members

Releted MCQ Question on
Inorganic Chemistry >> Classification of Elements and Periodicity in Properties

Releted Question 1

The correct order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is

A. $$C > N > O > F$$
B. $$O > N > F > C$$
C. $$O > F > N > C$$
D. $$F > O > N > C$$
Releted Question 2

The element with the highest first ionization potential is

A. boron
B. carbon
C. nitrogen
D. oxygen
Releted Question 3

The first ionisation potential in electron volts of nitrogen and oxygen atoms are respectively given by

A. $$14.6,13.6\,$$
B. $$13.6,14.6$$
C. $$13.6,13.6$$
D. $$14.6,14.6$$
Releted Question 4

Atomic radii of fluorine and neon in $$\mathop {\text{A}}\limits^ \circ $$ngstorm units are respectively given by

A. $$0.72,1.60$$
B. $$1.60,1.60\,$$
C. $$0.72,0.72\,\,$$
D. None of these values

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Classification of Elements and Periodicity in Properties


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