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