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1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

A pair of amphoteric oxides is

A
$$\mathrm{Al}_2 \mathrm{O}_3, \mathrm{Li}_2 \mathrm{O}$$
B
$$\mathrm{BeO}, \mathrm{BO}_3$$
C
$$\mathrm{BeO}, \mathrm{MgO}$$
D
$$\mathrm{BeO}, \mathrm{ZnO}$$
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

In which one of the following pairs, both the elements does not have $$(n-1) d^{10} n s^2$$ configuration in its elementary state?

A
$$\mathrm{Zn}, \mathrm{Cd}$$
B
$$\mathrm{Cd}, \mathrm{Hg}$$
C
$$\mathrm{Hg}, \mathrm{Cn}$$
D
$$\mathrm{Cu}, \mathrm{Zn}$$
3
KCET 2022
MCQ (Single Correct Answer)
+1
-0

Amphoteric oxide among the following

A
$$\mathrm{CO}_2$$
B
$$\mathrm{Ag}_2 \mathrm{O}$$
C
$$\mathrm{SnO}_2$$
D
$$\mathrm{BeO}$$
4
KCET 2022
MCQ (Single Correct Answer)
+1
-0

The property of halogens which is not correctly matched is

A
$$\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$$ (Electronegativity)
B
I $$>\mathrm{Br}>\mathrm{Cl}>\mathrm{F}$$ (Density)
C
$$\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>$$ I (Electron gain enthalpy)
D
$$\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>$$ I (Ionisation enthalpy)
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