WorksheetsP-block elements
Total questions: 10
Worksheet time: 5mins
The oxides of boron and silicon are _______in nature.
basic
acidic
amphoteric
both a & b
It is the strongest oxidising agent and most reactive element among the halogens.
F
Cl
Br
I
Borax is______
Na3[B2O5(OH)3].7H2O
Na2[B4O5(OH)4].8H2O
Na4[B2O6(OH)2].5H2O
Na[B(OH)2]
In groups 15 to 18, the poor shielding effect of d & f electrons are overcome by the increased shielding effect of the additional ________electrons.
s
p
d
f
Many of the Boron compounds are
electron rich
electron deficient
electron donor
none
Diborane is ______
B2H8
B4H10
B2H3
B2H6
Tl exists in +1 oxidation state rather than +3 due to
low ionisation energy
larger size
inert pair effect
Shielding effect
The chemical form of Borax is
Sodium carbonate
Sodium tetra borate
Sodium tetraborate decahydrate
Which of the following metals has the largest abundance in the earth's crust?
Al
Ca
Mg
Na
Which of the following elements has a greater tendency to form chain of bonds with itself or with other atoms?
B
N
C
O
