Question

The correct order of decreasing electronegativity values among the elements (i) - beryllium, (ii) - oxygen, (iii) - nitrogen and (iv) - magnesium is

A. (ii) > (iii) > (i) > (iv)  
B. (iii) > (iv) > (ii) > (i)
C. (i) > (ii) > (iii) > (iv)
D. (i) > (ii) > (iv) > (iii)
Answer :   (ii) > (iii) > (i) > (iv)
Solution :
Electronegativity values of given elements are as follows :
$$\eqalign{ & Be - 1.5\left( {\text{i}} \right)\,\,\,\,\,\,\,\,\,\,\,\,Mg - 1.2\left( {{\text{iv}}} \right) \cr & O - 3.5\left( {{\text{ii}}} \right)\,\,\,\,\,\,\,\,\,\,\,\,N - 3.0\left( {{\text{iii}}} \right) \cr & {\text{i}}{\text{.e}}{\text{.}}\,\,\left( {{\text{ii}}} \right){\text{ > }}\left( {{\text{iii}}} \right){\text{ > }}\left( {\text{i}} \right){\text{ > }}\left( {{\text{iv}}} \right) \cr} $$

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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