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Which of the following have highest electron affinity?

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Important Questions on Periodic Properties and Variations of Properties – Physical and Chemical

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

What is the correct oder of electron gain enthalpy of $Cl, F, Te, Po$

MEDIUM

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements?
a. Nitrogen
b. Phosphorous
c. Chlorine
d. Fluorine

MEDIUM

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The correct order of first electron affinity of

O, S

and

Se

MEDIUM

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The difference between electron gain enthalpies will be maximum between :

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Which of the following reactions does not involve absorption of energy?

I. $O (g) + e^{-} ⟶ O^{-} (g)$

II. $S (g) + e^{-} ⟶ S^{-} (g)$

III. $O^{-} (g) + e^{-} ⟶ O^{2 -} (g)$

IV. $Cl (g) + e^{-} ⟶ {Cl}^{-} (g)$

MEDIUM

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

For electron gain enthalpies of the elements denoted as

Δ_{eg} H

, the incorrect option is :

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The element with maximum bond-energy

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Which of the following represents the correct order of increasing first ionization enthalpy for

Ca, Ba, S, Se and Ar

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Which of the following elements has the most negative electron gain enthalpy?

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The first electron affinity of

C, N

and

O

will be of the order

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The formation of the oxide ion,

O^{2 -} (g)

, from oxygen atom requires first an exothermic and then an endothermic step as shown in below:

O (g) + e^{-} ⟶ O^{-} (g); Δ_{f} H^{⊖} = - 141 k J m o l^{- 1}

O^{-} (g) + e^{-} ⟶ O^{2 -} (g); Δ_{f} H^{⊖} = + 780 k J m o l^{- 1}

Thus process of formation of

O^{2 -}

in gas phase is unfavourable though

O^{2 -}

is isoelectronic with neon. It is due to the fact that,

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na ⁺ will be :

MEDIUM

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

In which of the following, elements are arranged in the correct order of their electron gain enthalpies.

HARD

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical?

(A) $Rb$ and $Cs$

(B) $Na$ and $K$

(D) $I$ and $At$

Choose the correct answer from the options given below:

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

For

{Na}^{+}, {Mg}^{2 +}, F^{-}

and

O^{2 -}

, the correct order of increasing ionic radii is:

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Which element has the highest first ionization potential?

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Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The effective nuclear charge of an element with three valence electrons is

2.60

. What is the atomic number of the element?

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

The absolute value of the electron gain enthalpy of halogens satisfies:

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

Within each pair of elements

F

and

C l

S

and

S e

, and

Li

and

Na

, respectively, the elements that release more energy upon an electron gain are

EASY

Science>Chemistry>Periodic Properties and Variations of Properties – Physical and Chemical>Periodic Properties and Their Variation in Groups and Periods

When the first electron gain enthalpy

({ΔH}_{eg})

of oxygen is

- 141 kJ / mol

, its second electron gain enthalpy is:

Which of the following have highest electron affinity?

Important Questions on Periodic Properties and Variations of Properties – Physical and Chemical

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