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

Among the given species the isostructural pairs is

A
$$\mathrm{NF}_3$$ and $$\mathrm{BF}_3$$
B
$$\mathrm{BF}_4^{-}$$ and $$\mathrm{NH}_4^{+}$$
C
$$\mathrm{BCl}_3$$ and $$\mathrm{BrCl}_3$$
D
$$\mathrm{NH}_3$$ and $$\mathrm{NO}_3^{-}$$
2
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

The half-life period of a radioactive element '$$X$$' is same as the mean life time of another radioactive element '$$Y$$'. Initially, both of them have the same number of atoms, then

A
$$Y$$ will decay faster
B
$$X$$ will decay faster
C
both of them will decay at same decay constant
D
can't predict
3
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following lanthanides are used in TV screens?

A
Eu
B
Ce
C
Tb
D
Dy
4
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Which type of isomerism is exhibited by $$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$$?

A
Geometrical isomerism
B
Optical isomerism
C
lonisation isomerism
D
Linkage isomerism
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