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

Match the species given in column I with the shape given in column II and assign the correct code.

Column I (Species) Column II
(Shape)
A. $$\mathrm{SF_4}$$ (I) Tetrahedral
B. $$\mathrm{HClO_2}$$ (II) Pyramidal
C. $$\mathrm{BrO_3^-}$$ (III) See-saw shaped
D. $$\mathrm{NH_4^+}$$ (IV)
Angular

A
A - (I), B - (II), C - (III), D - (IV)
B
A - (II), B - (I), C - (IV), D - (III)
C
A - (III), B - (IV), C - (II), D - (I)
D
A - (IV), B - (III), C - (I), D - (II)
2
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 $$\mathrm{NO}_3^{-}$$
3
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
4
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
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