Among $P_2O_5$,$As_2O_3$,$Sb_2O_3$,and $Bi_2O_3$,the most acidic oxide is

On heating ammonium dichromate,the gas evolved is

What is the molecular formula of pyrophosphoric acid?

Which of the following is an ionic compound?

Identify the correct order$(s)$ among the following:
$a. NH_3 > PH_3 > AsH_3$ (Thermal stability)
$b. NH_3 < PH_3 < AsH_3$ (Reducing power)
$c. NI_3 > NBr_3 > NCl_3$ (Lewis basic character)
$d. N_2O_5 > P_2O_5 > As_2O_5$ (Acidic character)
Select the correct option:

How does the acidity of pentoxides vary down the $VA$ group?