CBSE
Which of the following is an amphoteric hydroxide?
Ca(OH)2
Mg(OH)2
Be(OH)2
Sr(OH)2
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is :
Mg
Ca
Sr
Be
Which azide is explosive?
Ba(N3)2
NaN3
KN3
Mg3N2
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 soluble in water?
Br
Sr
Mg
Ba