Q.1.
The number of d-electrons in Fe2+ ( Z=26) is not equal to that of the
-
30%
a) p-electrons in Ne ( at. no.=10)
-
10%
b) s-electrons in Mg 9 at no=12)
-
50%
c) d-electrons in Fe
-
10%
d) p-electrons in Cl- ( at no of Cl=17)
Explanation
Q.2.
The electron configuration of P in H3PO4 is
-
8%
a) 1s2 2s2 2p6 3s2 3p3
-
23%
b) 1s2 2s2 2p6 3s2
-
62%
c) 1s2 2s2 2p6
-
8%
d) 1s2 2s2 2p6 3s2 3p6 4s1
Q.3.
Which of the following has sp3 hybridisation? [ DEC 2001]
-
0%
a) BBr3
-
43%
b) XeF4
-
43%
c)BCl3
-
14%
d)XeO3
Q.4.
In a ground state of Cu+, the number of shells occupied, subshells occupied, filled orbitals and unpaired electrons respectively are
-
50%
a) 4, 8, 15, 0
-
17%
b) 3, 6, 15, 1
-
33%
c)3, 6, 14, 0
-
0%
d)4, 7, 14, 2
Q.5.
Which of the following has non-spherical shell of electron?
-
33%
a) He
-
17%
b) B
-
33%
c) Be
-
17%
d) Li
Q.6.
An isotone of 76 Ge32 is
-
17%
a) 77Ge32
-
67%
b) 77As33
-
0%
c) 77Se34
-
17%
d) 78Se74