1
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The bond lengths of diatomic molecules of elements $X$, $Y$ and $Z$ respectively are 143, 110 and 121 pm . The atomic numbers of $X, Y$, and $Z$ respectively are
A
$9,7,8$
B
$7,8,9$
C
$9,8,7$
D
$7,9,8$
2
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The correct formula used to determine the formal charge (Q) on an atom in the given Lewis structure of a molecule or ion is ( $V=$ number of valence electrons in free atom, $U=$ number of unshared electrons on the atom, $B=$ number of bonds around the atom)
A
$Q_1=V-\left(\frac{U}{B}\right)$
B
$Q_i=V+(U-B)$
C
$O_r=V-(\nu+B)$
D
$Q,=V-\left(\frac{B}{U}\right)$
3
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Match the following.
List - I
(Bond )
List - II
(Bond enthalpy (in $\mathrm{kJ} \mathrm{mol}^{-1}$ )
A $\mathrm{Si}-\mathrm{Si}$ I 240
B $\mathrm{C}-\mathrm{C}$ II 297
C $\mathrm{Sn}-\mathrm{Sn}$ III 348
D $\mathrm{Ge}-\mathrm{Ge}$ IV 248
The correct answer is
A
$A-12, B=111, C-L, D=N$
B
$\mathrm{A}=\mathrm{II}, \mathrm{B}-\mathrm{N}, \mathrm{C}-$ III, $\mathrm{D}-1$
C
$A-11, B=11, C-D=N$
D
$\mathrm{A}-$ III, $\mathrm{B}-\mathrm{L}, \mathrm{C}, \mathrm{N}, \mathrm{D}-$ II
4
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

In the Lewis dot structure of carbonate ion shown under the formal charges on the oxygen atoms 1, 2 and 3 are respectively

AP EAPCET 2022 - 5th July Morning Shift Chemistry - Chemical Bonding and Molecular Structure Question 13 English

A
$$-2,0,0$$
B
$$-1,0,-1$$
C
$$0,-1,-1$$
D
$$-3,0,+1$$
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