1
KCET 2026
MCQ (Single Correct Answer)
+1
-0
The highest oxidation state of manganese in fluoride is $+4$ ($\text{MnF}_4$), but the highest oxidation state in oxides is $+7$ ($\text{Mn}_2\text{O}_7$), because
A
Fluorine is more electronegative than oxygen
B
Fluorine possesses d-orbitals
C
Fluorine stabilises lower oxidation state
D
In covalent compounds, fluorine can form single bond only, while oxygen forms double bond
2
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Which of the following will not act as an oxidising agent?
A
$\text{CrO}_3$
B
$\text{MoO}_3$
C
$\text{CrO}_4^{2-}$
D
$\text{Cr}_2\text{O}_7^{2-}$
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Match List-I with List-II
List-I (Complex)List-II (Geometry)
(a)$[\text{Co(NH}_3\text{)}_6]^{3+}$(i)Trigonal bipyramidal
(b)$[\text{NiCl}_4]^{2-}$(ii)Octahedral
(c)$[\text{Ni(CN)}_4]^{2-}$(iii)Tetrahedral
(d)$[\text{Fe(CO)}_5]$(iv)Square planar
Choose the correct answer from the options given below.
A
a-ii, b-iii, c-iv, d-i
B
a-ii, b-i, c-iii, d-iv
C
a-iii, b-ii, c-iv, d-i
D
a-i, b-iii, c-iv, d-ii
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Given below are two statements:
Statement-I: The $\text{M}-\text{C}$ $\sigma$ bond is formed by the donation of lone pair of electrons on the carbonyl carbon into a vacant d-orbital of the metal.
Statement-II: The $\text{M}-\text{C}$ $\pi$ bond is formed by the donation of a pair of electrons from a filled d-orbital of metal into the vacant antibonding $\pi^*$ orbital of carbon monoxide.
In the light of the above statements, choose the correct answer from the options given below:
A
Both Statement I and Statement II are correct
B
Both Statement I and Statement II are incorrect
C
Statement I is correct but Statement II is incorrect
D
Statement I is incorrect but Statement II is correct