Question

Name the hydrides of elements of group- 15 and explain their following properties:

(i) Bond angle (ii) basic character (iii) Thermal stability (iv) Reducing nature (v) Boiling point.​

Answer 1

Answer:

All five of the Group 15 elements form hydrides of the formula EH3.

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Trihydrides of the Group 15 Elements.

Compound | Traditiona name| IUPAC name|

NH3 | Ammonia | Azane |

PH3 | Phosphine | Phosphane |

AsH3 | Arsine |Arsane |

SbH3 | Stibine | Stibane |

(i) Bond angle

Bond angle decreases → The hydrides of these elements are pyramidal in shape with a lone pair of electrons in one of the orbitals. On moving down the group the bond angles gradually decrease due to a decrease in bond pair-bond pair repulsion.