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From the  given statementsi) O -----H hydrogen bond length is more than covalent "O–H" bond length.ii) The ionic bond strength of CsF is more than that of NaF.iii) The number of electrons present in all inner shells of sodium atom are 10.The correct combination is

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a

only i is correct

b

only i and ii are correct

c

only ii and iii are correct

d

only i and iii are correct

answer is D.

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Detailed Solution

i) B.L: Hyderogen  bond B.L > Normal covalent bond B.L ⇒ correctO-------H > "O-H"ii)L.E decreases NaF>CsFBond strength decreaseslattice energy ∝ Bond strengthiii)11Na1s22s2p6⏟3s1⇒CORRECT                         ↓Innershells contains 10 electrons
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From the  given statementsi) O -----H hydrogen bond length is more than covalent "O–H" bond length.ii) The ionic bond strength of CsF is more than that of NaF.iii) The number of electrons present in all inner shells of sodium atom are 10.The correct combination is