For the second period elements the correct increasing order of first ionisation enthalpy is:
Li < B < Be < C < O < N < F < Ne
Li < B < Be < C < N < O < F < Ne
Li < Be < B < C < O < N < F < Ne
Li < Be < B < C < N < O < F < Ne
Which of the following is an amphoteric hydroxide?
Ca(OH)2
Mg(OH)2
Be(OH)2
Sr(OH)2
C.
Be(OH)2
Be(OH)2 amphoteric in nature, since it can react both with acid and base.
Be(OH)2 + 2HCl → BeCl2 + 2H2O
Be(OH)2 + 2NaOH → Na2[Be(OH)4]
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is :
Mg
Ca
Sr
Be