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

$$\mathrm{PH}_3$$ has much lower boiling point than $$\mathrm{NH}_3$$ because :

A
$$\mathrm{PH}_3$$ contains covalent bonds whereas $$\mathrm{NH}_3$$ contains ionic bonds.
B
$$\mathrm{NH}_3$$ forms hydrogen bond
C
$$\mathrm{PH}_3$$ has smaller molecular weight
D
$$\mathrm{NH}_3$$ undergoes umbrella inversion
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

ortho-silicate ion is

A
$$\mathrm{SiO}_2^{2-}$$
B
$$\mathrm{SiO}_4^{4-}$$
C
$$\mathrm{Si}_2 \mathrm{O}_4^{6-}$$
D
$$\mathrm{SiO}_3^{-}$$
3
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following option is correct regarding $$\mathrm{OF}$$ and $$\mathrm{F}_2$$ ?

A
$$\mathrm{O F}$$ is paramagnetic while $$\mathrm{F}_2$$ is diamagnetic.
B
$$\mathrm{OF}$$ is more stable towards dissociation into atoms than $$\mathrm{F}_2$$.
C
Both (a) and (b) are correct.
D
None of the above is correct.
4
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)
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