P-block elements
Authored by Bhuvaneswari Chezian
Chemistry
12th Grade
Used 262+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The oxides of boron and silicon are _______in nature.
basic
acidic
amphoteric
both a & b
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
It is the strongest oxidising agent and most reactive element among the halogens.
F
Cl
Br
I
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Borax is______
Na3[B2O5(OH)3].7H2O
Na2[B4O5(OH)4].8H2O
Na4[B2O6(OH)2].5H2O
Na[B(OH)2]
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Many of the Boron compounds are
electron rich
electron deficient
electron donor
none
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diborane is ______
B2H8
B4H10
B2H3
B2H6
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tl exists in +1 oxidation state rather than +3 due to
low ionisation energy
larger size
inert pair effect
Shielding effect
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