Single Option Correct.
1) Electron Affinity is +ve when-
A) O- is formed from O.
B) O 2- is formed from O-.
C) O+ is formed from O.
D) Electron Affinity is always negative.
2)Of the 4 ∂H values needed to calculate the lattice Energy using Born-Haber's Cycle, the most difficult one to measure is-
A) Heat of sublimation of the metal.
B) Heat of formation of gaseous atoms of non-metal.
C) Ionisation Energy of the metal.
D) Electron Affinity of the non-metal.
3)Which of the foll. forms a stable +4 oxidation state-?
A) Lanthanum B) Cerium
C) Europium D) Gadolinium
4)Select incorrect order of size of atoms/ions-
A) I+ < I < I-
B) Fe=Co=Ni
C)Ni<Cu<Zn
D) None is Incorrect.
5) In which case Effective Nuclear Charge is minimum -?
A) Be B) Be2+
C) Be3+ D) Equal.
6)With respect to Oxygen, maximum valency is shown by-
A) Halogen family
B) Oxygen family.
C) NItrogen family.
D) Boron Family.
7) Elements X & Y have valence shell electronic Config. as-
X: ns2np5 Y: ns2np3
Which compound is likely to be formed among them-?
A) X3Y5 B) Y3X5
C) XY D) YX
8) For Be, Zeff =1.95 & for Bex+ , Zeff =2.30. "x" is -
A) 1 B) 2 C) 3 D) 0
9)Ionic Hydrides react with water to give-
A) Basic sol.n
B) ACidic sol.n
C) A hydride ion.
D) Protons.
10) Out of BeH2, CuH2, CrH3, & NaH, covalent hydrides are-
A) BeH2,NaH B) CuH2,CrH3
C) BeH2,CuH2,CrH3 D) All of these.
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