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The figure shows a part of the periodic table:
If we move horizontally from left to right:

$Li$ $Be$ $B$ $C$ $N$ $O$ $F$

$Na$ $Mg$ $Al$ $Si$ $P$ $S$ $Cl$

How does electronegativity change?

Important Questions on Classification of Elements and Periodicity in Properties

MEDIUM

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 ?

\begin{matrix} Set I & {Al}_{2} O_{3} \cdot {xH}_{2} O_{(s)} + {OH}_{(aq)}^{-} \\ Set II & {Al}_{2} O_{3} x \cdot H_{2} O_{(s)} + H_{2} O_{(l)} \\ Set III & {Al}_{2} O_{3} x \cdot H_{2} O_{(s)} + H_{(aq)}^{+} \\ Set IV & {Al}_{2} O_{3} \cdot {xH}_{2} O_{(s)} + {NH}_{3 (aq)} \end{matrix}

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The species

A r, K^{+}

and

C a^{2 +}

contain the same number of electrons. In which order do their radii increase?

EASY

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:

MEDIUM

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

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

When the first electron gain enthalpy

({ΔH}_{eg})

of oxygen is

- 141 kJ / mol

, its second electron gain enthalpy is:

EASY

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?

EASY

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

Which of the following orders of ionic radii is correctly represented?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The correct order of atomic radii is:

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 :

MEDIUM

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

The ionic radii

(in Å)

N^{3 -}, O^{2 -}

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 size of the iso-electronic species

C l^{-}

, Ar and

C a^{2 +}

is affected by:

MEDIUM

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 ?

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

In comparison to boron, beryllium has:

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

B e

. Consider the following statement:
(I) it is easier to remove

2 p

electron than

2 s

electron
(II)

2 p

electron of

B

is more shielded from the nucleus by the inner core of electrons than the

2 s

electrons of

B e

(III)

2 s

electron has more penetration power than

2 p

electron
(IV) atomic radius of

B

is more than

B e

(atomic number

B : 5, B e = 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

The acidic, basic and amphoteric oxides, respectively, are

MEDIUM

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

In which of the following options the order of arrangement does not agree with the variation of property indicated against it?

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):

The figure shows a part of the periodic table: If we move horizontally from left to right: Li Be B C N O F Na Mg Al Si P S Cl How does electronegativity change?

Important Questions on Classification of Elements and Periodicity in Properties

Learn and Prepare for any exam you want !

The figure shows a part of the periodic table:
If we move horizontally from left to right:

$Li$ $Be$ $B$ $C$ $N$ $O$ $F$

$Na$ $Mg$ $Al$ $Si$ $P$ $S$ $Cl$

How does electronegativity change?