Which of the following represents the correct outer electronic configuration of the Group 13 elements?
ns2 np1
ns2 np3
ns2 nd1
ns2 np6
The liquefied metal expanding on solidification is
Ga
Al
Zn
Cu
Antidote for carbon monoxide poisoning is
carbogen
carborundum
carbon dioxide
carbonyl chloride
In diborane, the two H — B — H angles are nearly
60º, 120º
95º, 120º
95º, 150º
120ºº, 180ºº
The first ionisation potential of Group 13 elements is lower than that of Group 2 elements, because?
electrons in Group 2 elements are bonded weakly
electrons in Group 13 elements are bonded tightly
Group 13 elements have 3 electrons in valence shell
Group 13 elements have 5 electrons in valence shell
Which of the following statement is correct about Group 13 elements?
they form only compounds
they form only covalent compounds
they form only co-ordinate compounds
they form both ionic and covalent compounds
which of the following is an electron deficient molecule?
B2H6
C2H6
PH3
SiH4
In the Group 13 elements, the +1 oxidation state of thallium is more stable than +3 oxidation state, because of
replusion effect
inductive effect
inert pair effect
increasing atomic number
Which member of Group 13 elements does not exhibit the Group valency in its compound?
boron
gallium
thallium
aluminium
