BeO reacts with HF in presence of ammonia to give [A] which on thermal decomposition produces [B] and ammonium fluoride. Oxidation state of Be in [A] is____________.

BeCl₂ reacts with LiAlH₄ to give:

Which of the following sets are correct regarding polymer?

(A) Copolymer: Buna-S

(B) Condensation polymer: Nylon-6,6

(C) Fibres: Nylon-6,6

(D) Thermosetting polymer: Terylene

(E) Homopolymer: Buna-N

Choose the correct answer form given options below

The oxide which contains an odd electron at the nitrogen atom is

Match List – I with List – II

  List – I                                                                              List – II

(Metal)                                                                            (Emitted light wavelength (nm))

(A) Li                                                                                 (I) 670.8

(B) Na                                                                               (II) 589.2

(C) Rb                                                                               (III) 780.0

(D) Cs                                                                               (IV) 455.5

Choose the most appropriate answer from the options given below:

Reaction of BeCl₂ with LiAlH₄ gives:

(A) AlCl₃

(B) BeH₂

(C) LiH

(D) LiCl

(E) BeAlH₄

Choose the correct answer from options given below: