The false statement among the following is:
Reducing character of hydrides of group 15 increases down the group
Basicity of hydrides of group 15 increases down the group
Phosphorus and arsenic can form bond but not nitrogen
does not exist
Hydrides of group 15 are basic due to their ability to donate lone pair of electrons. On moving down the group, the size of atom increases and consequently charge density decreases. Therefore, the lone pair is less available for donation. Hence basicity decreases down the group.