The following are some statements related to group `15` hydrides.
(i) Reducing property increases from `NH_3` to `BiH_3`
(ii) Tendency to donate lone pair decreases from `NH_3` to `BiH_3`
(iii) Thermal stability of hydrides decreases from `NH_3` to `BiH_3`
(iv) Bond angle decreases from `NH_3` to `BiH_3`.

The following are some statements related to VA group hydrides I) Reducing property increases from NH_(3) to BiH_(3) II) Tendency to donate lone pair decreases from NH_(3) to BiH_(3) III) Ease of replacing H with Cl decreases from NH_(3) to BiH_(3) IV) Ease of formation of hydrides decreases from NH_(3) to BiH_(3) The correct statement are

The bond angle decreases from NH_(3) to BiH_(3) due to

The following are some statements related to II group metals I. The reaction with water increases from Be to Ba II. The ionic nature of hydrides decreases from Be to Ba III. The thermal stability of the peroxides increases with increase in cationic size IV. The solubility of sulphates increases from Mg to Ba The correct options are :