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