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What do you mean by Allred-Rochow's Scale of Electronegativity ?

Important Questions on Classification of Elements and Periodicity in Properties

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The ionic radii (in  Å) of N3-, O2-  and  F-  are respectively:
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The electronic configuration with the highest ionization enthalpy is:
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Which one of the following has largest ionic radius ?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Give a reason for the following.

Ionisation potential increases across a period, from left to right.

EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na + will be :
HARD
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The option(s) with only amphoteric oxides is(are):
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
In the following sets of reactants which two sets best exhibit the amphoteric character of Al2O3 . xH2O ?

Set I Al 2 O 3 · xH 2 O s + OH aq - Set II Al 2 O 3 x · H 2 O s + H 2 O l Set III Al 2 O 3 x · H 2 O s + H aq + Set IV Al 2 O 3 · xH 2 O s + NH 3 aq
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
In comparison to boron, beryllium has:
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar ?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The species Ar, K+ and Ca2+  contain the same number of electrons. In which order do their radii increase?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The element having the greatest difference between its first and second ionization energies, is
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
When the first electron gain enthalpy (ΔHeg) of oxygen is -141 kJ/mol , its second electron gain enthalpy is:
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
For the second period elements the correct increasing order of first ionization enthalpy is:
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Which of the following atoms has the highest first ionization energy?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The size of the iso-electronic species Cl- , Ar and Ca2+ is affected by:
HARD
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
B has a smaller first ionization enthalpy than Be. Consider the following statement:
(I) it is easier to remove 2p electron than2s  electron
(II) 2p electron of B is more shielded from the nucleus by the inner core of electrons than the 2s electrons of Be
(III) 2s electron has more penetration power than 2p electron
(IV) atomic radius of B is more than Be
(atomic number B:5, Be=4 )
The correct statements are.
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Which of the following orders of ionic radii is correctly represented?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Which element has the highest first ionization potential?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The correct order of atomic radii is:
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
In which of the following options the order of arrangement does not agree with the variation of property indicated against it?