Be and Al exhibit diagonal relationship which of the following statements about them is/are not true?(i) Both react with HCl to liberate H2(ii) They are made passive by HNO3(iii) Their carbides give acetylene on treatment with water(iv) Their oxides are amphoteric

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

(iii) and (iv)

(i) and (iii)

(i) only

(iii) only

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

"Be" and "Al" shows certain similarities due to diagonal relationshipBoth Be and Al reacts with HCl and liberates H2 gasBe + 2HCl → BeCl2 + H2↑2Al + 6HCl → 2AlCl3 + 3H2↑→ Both "Be" and "Al" are resistant [Passive] to the action of con. HNO3 due to the formation of protective oxide layer on their surface →Be2C + 4H2O → 2Be(OH)2 + CH4Al4C3 + 12H2O → 4Al(OH)3 + 3CH4Both beryllium and aluminium carbides on hydrolysis gives methane and they are called methanidesBoth the oxdies of Be and Al are amphoteric in nature, means they react with both acids as well as basesBeO + 2HCl → BeCl2 + H2O : Al2O3 + 6HCl → 2AlCl3 + 3H2O

Watch 3-min video & get full concept clarity