Question

Which of the following is incorrect statement?
a) s-block elements, except Be and Mg, form ionic hydrides
b) BeH2, MgH2, CuH2, ZnH2, CaH2and HgH2are intermediate hydrides
c) p-block elements form covalent hydrides
d) d-and f-block elements form ionic hydrides

Answer 1

p block elements from covalent hydrides

Answer 2

Answer:

a) s-block elements, except Be and Mg, form ionic hydrides = correct

S-block elements  the hydrogen molecules when reacts with highly electropositive elements and form hydride.

b) BeH2, MgH2, CuH2, ZnH2, CaH2and HgH2are intermediate hydrides= correct.

c) p-block elements form covalent hydrides =  correct ,the P-block elements  These are highly electronegative elements, examples of covalent hydrides HCl, HFl, H2O, NH3 etc.

d) d-and f-block elements form ionic hydrides = incorrect , the d and f-block elements form metallic hydrides . compounds that Hydrogen forms by reacting with transition elements.