TS EAMCET 2022 (Online) 20th July Evening Shift | Periodic Table and Periodicity Question 33 | Chemistry

The successive ionisation energies (starting from the 1 st ) of an element are $801,2430,3660,25,000$ and $32,800 \mathrm{~kJ} \mathrm{~mol}^{-1}$, respectively. The element is

TS EAMCET 2022 (Online) 20th July Evening Shift

MCQ (Single Correct Answer)

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Assertion (A) The ionic radii of the alkaline earth metals are smaller than those of alkali metals in the same period.

Reason (R) Alkali metals have higher nuclear charge than that of the alkaline earth metals.

The correct option among the following is

(A) is true, (R) is true and (R) is the correct explanation for (A).

(A) is true, (R) is true but (R) is not the correct explanation for (A).

(A) is true but (R) is false.

(A) is false but (R) is true.

TS EAMCET 2022 (Online) 20th July Morning Shift

MCQ (Single Correct Answer)

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Which of the following species are isoelectronic species?

(A) $\mathrm{O}^{2-}$

(B) $\mathrm{F}^{-}$

(D) $\mathrm{Mg}^{2+}$

A, B and C only

A, C and D only

C and D only

A, B, C and D

TS EAMCET 2022 (Online) 20th July Morning Shift

MCQ (Single Correct Answer)

-0

Arrange the following in increasing order of ionic radii

$$ \mathrm{O}^{2-}, \mathrm{Na}^{+}, \mathrm{F}^{-}, \mathrm{Mg}^{2+} $$

$\mathrm{Mg}^{2+}<\mathrm{Na}^{+}<\mathrm{F}^{-}<\mathrm{O}^{2-}$

$\mathrm{Mg}^{2+}<\mathrm{F}^{-}<\mathrm{Na}^{+}<\mathrm{O}^{2-}$

$\mathrm{O}^{2-}<\mathrm{F}^{-}<\mathrm{Na}^{+}<\mathrm{Mg}^{2+}$

$\mathrm{O}^{2-}<\mathrm{Mg}^{2+}<\mathrm{F}^{-}<\mathrm{Na}^{+}$

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