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Which one has the lowest boiling point? (a) \(\mathrm{NH}_{3}\) (b) \(\mathrm{SbH}_{3}\) (c) \(\mathrm{AsCl}_{2}\) (d) \(\mathrm{PH}_{3}\)

The number of oxygen atoms bonded to each phosphorous atom in \(\mathrm{P}_{4} \mathrm{O}_{10}\) is (a) 6 (b) 5 (c) 4 (d) 3

Which of the following fluorides does not exist? (a) \(\mathrm{PF}\) (b) \(\mathrm{SbF}\) (c) \(\mathrm{NF}_{5}^{5}\) (d) AsF

Which one of the following hydrides is most acidic? (a) \(\mathrm{H}_{2} \mathrm{Te}\) (b) \(\mathrm{H}, \mathrm{S}\) (c) \(\mathrm{H}_{2} \mathrm{O}\) (d) \(\mathrm{H}_{2} \mathrm{Se}\)

Which of the following has the most acidic character? (a) \(\mathrm{HF}\) (b) \(\mathrm{HCl}\) (c) \(\mathrm{HBr}\) (d) \(\mathrm{HI}\)

Which one of the sixth group elements has the highest catenation power? (a) \(\mathrm{O}\) (b) \(\mathrm{S}\) (c) \(\mathrm{Se}\) (d) \(\mathrm{Te}\)

Which of the following has the lowest bond angle? (a) \(\mathrm{H}, \mathrm{O}\) (b) \(\mathrm{CH}_{4}\) (c) \(\mathrm{H}_{2} \mathrm{~S}\) (d) \(\mathrm{NH}_{3}\)

Which one of the following elements does not form the compound, \(\mathrm{M}_{4} \mathrm{O}_{10}(\mathrm{M}=\) element \() ?\) (a) As (b) \(\mathrm{Bi}\) (c) \(\mathrm{Sb}\) (d) \(\mathrm{Pb}\)

Which of the following bonds will be mostpolar? (a) \(\mathrm{O}-\mathrm{F}\) (b) \(\mathrm{N}-\mathrm{F}\) (c) \(\mathrm{N}-\mathrm{N}\) (d) \(\mathrm{N}-\mathrm{Cl}\)

Which of the following sets has the strongest tendency to form anions? (a) \(\mathrm{V}, \mathrm{Cr}, \mathrm{Mn}\) (b) \(\mathrm{N}, \mathrm{O}, \mathrm{F}\) (c) \(\mathrm{Ga}, \mathrm{In}, \mathrm{Tl}\) (d) \(\mathrm{Na}, \mathrm{Mg}, \mathrm{Al}\)