The P-Block Elements Quiz-1

Question 1

The number of P-O-P bonds in cyclic metaphosphoric acid is

Accepted Answer

three

Answer

zero

Answer

two

Answer

four

Question 2

Ammonia can be dried by

Accepted Answer

anhydrous $CaCl_2$

Answer

conc. $H_2SO_4$

Answer

$P_4O_{10}$

Answer

CaO

Question 3

Polyphosphates are used as water-softening agents because they

Accepted Answer

form soluble complexes with cationic species

Answer

form soluble complexes with anionic species

Answer

precipitate anionic species

Answer

precipitate cationic species

Question 4

The bonds present in $N_2O_5$ are

Accepted Answer

covalent and coordinate

Answer

only ionic

Answer

only covalent

Answer

covalent and ionic

Question 5

Which one of the following is the strongest base?

Accepted Answer

$NH_3$

Answer

$AsH_3$

Answer

$PH_3$

Answer

$SbH_3$

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