It is because of inability of ns^² electrons of the valence shell to participate in bonding that

Which of the following oxide is amphoteric in nature?

BCl_₃ does not exist as dimer but BH_₃ exist as dimer B₂H₆ because:

Match List-I with List-II for the compositions of substances and select the correct answer using the code given : List-I List-II (Substances) (Composition)
(A) Plaster of Paris (i) CaSO4·2H2O
(B) Epsomite (ii) CaSO₄· ½ H₂O
(C) Kieserite (iii) MgSO₄·7H₂O
(D) Gypsum (iv) MgSO₄·H₂O (v) CaSO₄

Match List – I with List – II

Choose the correct answer from the options given below.

Which of the following is incorrect statement?

The pair of compounds that can exist together is:-

Which of the following species is not stable?

The stability of +1 oxidation state among Al, Ga, In and TI increases in the sequence:

The basic structural unit of silicates is:

Which of the following oxide is amphoteric in nature?