How many number of pi-bonds are present in ethyne?
(b) 4
(c) 5
Which of the following doesn't exist in liquid state?
1.
(a) 3
2.
(a) Hg
3.
(a) Li, Na, K
(c) Cu, Ni, Zn
(b) Ga
(c) Na
(d) 6
(d) Br
Which of the following set belongs to same period?
(b) Li, Mg, Ca
(d) F, Cl, Br