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KCET 2025
MCQ (Single Correct Answer)
+1
-0

The electronic configuration of X and Y are given below:

$$ \begin{aligned} & X: 1 s^2 2 s^2 2 p^6 3 s^2 3 p^3 \\ & Y: 1 s^2 2 s^2 2 p^6 3 s^2 3 p^5 \end{aligned} $$

Which of the following is the correct molecular formula and type of bond formed between X and Y ?

A
$X_3 Y$, ionic bond
B
$X_2 Y_3$, coordinate bond
C
$\mathrm{XY}_3$, covalent bond
D
$\mathrm{X}_2 \mathrm{Y}$, covalent bond
2
KCET 2025
MCQ (Single Correct Answer)
+1
-0
The change in hybridization (if any) of the 'Al' atom in the following reaction is $\mathrm{AlCl}_3+\mathrm{Cl}^{-} \rightarrow \mathrm{AlCl}_4^{-}$
A
No change in the hybridization state
B
$s p^2$ to $s p^3$
C
$s p^3$ to $s p^3 d$
D
$\mathrm{sp}^3$ to $\mathrm{sp}^2$
3
KCET 2024
MCQ (Single Correct Answer)
+1
-0

A pair of isoelectronic species having bond order of one is

A
$\mathrm{N}_2, \mathrm{CO}$
B
$\mathrm{N}_2, \mathrm{NO}^{+}$
C
$\mathrm{O}_2^{2-}, \mathrm{F}_2$
D
$\mathrm{CO}, \mathrm{NO}^{+}$
4
KCET 2023
MCQ (Single Correct Answer)
+1
-0

Which of the following statement is incorrect?

A
Bond length of $$\mathrm{O}_2>$$ Bond length of $$\mathrm{O}_2^{2+}$$
B
Bond order of $$\mathrm{O}_2^{+}<$$ Bond order of $$\mathrm{O}_2^{2-}$$
C
Bond length of $$\mathrm{O}_2>$$ Bond length of $$\mathrm{O}_2^{2-}$$
D
Bond order of $$\mathrm{O}_2>$$ Bond order of $$\mathrm{O}_2^{2-}$$
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