1
TG EAPCET 2025 (Online) 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In second period of the modern periodic table, two elements $X$ and $Y$ have higher first ionisation enthalpy values than the preceding and succeeding elements. $X$ and $Y$ are respectively

A

B, C

B

$\mathrm{Al}, \mathrm{S}$

C

$\mathrm{Be}, \mathrm{N}$

D

$\mathrm{Na}, \mathrm{S}$

2
TG EAPCET 2025 (Online) 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Consider the following pairs of elements and identify the pairs of elements which have nearly same atomic radius.

I. Y, La

II. Zr, Hf

III. Mo, W

IV. Cr, Mo

A

I and II

B

II and III

C

III and IV

D

I and III

3
TG EAPCET 2025 (Online) 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the sum of bond orders of $\mathrm{O}_2^{-}$and $\mathrm{O}_2^{2-}$ is $x$, then bond order of $\mathrm{O}_2^{2+}$ will be

A

$1.20 x$

B

$1.33 x$

C

$1.50 x$

D

$2.50 x$

4
TG EAPCET 2025 (Online) 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the molecule / ion in which the ratio of $\sigma$ to $\pi$-bonds is $3: 2$

A

$\mathrm{HCO}_3^{-}$

B

$\mathrm{CH}_2(\mathrm{CN})_2$

C

$\mathrm{HClO}_4$

D

$\mathrm{XeO}_3$

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