Which of the following is used in high temperature thermometry?
Na
Ga
Ti
Hg
The liquefied metal expanding on solidification is
Al
Zn
Cu
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 is true for an element R present in Group 13 of the Periodic Table?
it forms RX2
it forms R2O3
it has oxidation state of +4
it is a gas at room temperature
Which of the following is a covalent compound?
AlF3
Al2O3
AlCl3
Al2(SO4)3
Boron and aluminium are
s-block elements
p-block elements
d-block elements
f-block elements
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 represents the correct outer electronic configuration of the Group 13 elements?
ns2 np1
ns2 np3
ns2 nd1
ns2 np6
The outermost ground state electronic configuration of Group 14 element is
ns2 npx1 npy1 npz0
ns2 npx2 npy1 npz0
ns1 npx1 npy1 npz1
ns1 npx2 npy1 npz0
