1
KCET 2022
MCQ (Single Correct Answer)
+1
-0

All Cu(II) halides are known, except the iodide, the reason for it is that

A
$$\mathrm{Cu}^{2+}$$ oxidises iodide to iodine
B
$$\mathrm{Cu}^{2+}$$ has much more negative hydration enthalpy
C
$$\mathrm{Cu}^{2+}$$ ion has smaller size.
D
iodide is bulky ion.
2
KCET 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following is not true for oxidation?

A
Addition of oxygen
B
Addition of electronegative element
C
Removal of hydrogen
D
Removal of electronegative element
3
KCET 2020
MCQ (Single Correct Answer)
+1
-0

How many moles of acidified $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$$ is required to liberate 6 moles of $$\mathrm{I}_2$$ from an aqueous solution of $$\mathrm{I}^{-}$$?

A
2
B
1
C
0.25
D
0.5
4
KCET 2020
MCQ (Single Correct Answer)
+1
-0

The oxidation number of nitrogen atoms in $$\mathrm{NH}_4 \mathrm{NO}_3$$ are

A
$$+5,+5$$
B
$$-3,+5$$
C
$$+3,-5$$
D
$$-3,-3$$
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