1
KCET 2026
MCQ (Single Correct Answer)
+1
-0
With respect to resonance structures of $\text{CO}_3^{2-}$ ion, which of the following statements are correct?
(a) All $\text{C}-\text{O}$ bonds in $\text{CO}_3^{2-}$ are equivalent
(b) There are three resonance structures possible for $\text{CO}_3^{2-}$ ion
(c) The position of carbon and oxygen should change in every resonance structure
(d) The formal charge on carbon atom is $-2$
A
a, b and c
B
a and b only
C
b and d only
D
a, b and d
2
KCET 2026
MCQ (Single Correct Answer)
+1
-0
In which of the following option/options, the order of arrangement does not agree with the variation of property indicated against it?
(a) $\text{BF}_3 > \text{NF}_3 > \text{NH}_3$ (Dipole moment)
(b) $\text{HgCl}_2 > \text{NH}_4^+ > \text{SF}_6$ (Bond angle)
(c) $\text{NH}_3 < \text{H}_2\text{O} < \text{HF}$ (Strength of intermolecular hydrogen bonding)
(d) $\text{H}-\text{I} > \text{H}-\text{Br} > \text{H}-\text{Cl}$ (Bond length)
A
a, b and c
B
a only
C
c and d only
D
d only
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
The types of hybrid orbitals of nitrogen in $\text{NO}_2^+, \text{NO}_3^-$ and $\text{NH}_4^+$ respectively are
A
$sp^3, sp$ and $sp^2$
B
$sp, sp^2$ and $sp^3$
C
$sp^2, sp$ and $sp^3$
D
$sp^2, sp^3$ and $sp$
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
A gas can be taken from A to B via two different paths ACB and ADB.

When path ACB is used, $60$ J of heat flows into the system and $30$ J of work is done by the system. If path ADB is used, work done by the system is $10$ J.
The heat flow into the system in path ADB is
A
$80$ J
B
$20$ J
C
$100$ J
D
$40$ J