Question

Select the incorrect statement about hydrides:

• A. Metallic hydrides are conductors of heat and electricity
• B. All metallic hydrides follow the law of constant composition
• C. $H_{2}O,HF$ are electron rich hydrides
• D. Metals of group 7, 8 and 9 do not form hydrides

Answer 1

The correct option is B All metallic hydrides follow the law of constant composition

Metallic hydrides are often non stoichiometric. The ratio of hydrogen atoms to the metal atoms in these hydrides is not fixed but varies with temperature and pressure.