2002..why is my answer rong????

BITSAT 2015 Papers › Inorganic Chemistry questions › 2002..why is my answer rong????

identify least stable ion amongst following:
a)Li^-
b)Be^-
c)B^-
d)C^-

ans given is b

but my answer is a becoz Bond order=0 from MOT for a)

why is my ans wrong?????

#Chemistry #Inorganic Chemistry

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4 Answers

ANKIT GOYAL ·2009-04-06 22:23:55

i think that Be is alkaline earth metal so it will be eletropositive iv nature and as in the case of Li it will convert into alkaline earth metal

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amit sahoo ·2009-04-06 22:42:38

just a guess............. i think Be has ns² configuration which means it has full-filled s-subshell and by adding one more electron we are disturbing this configuration while on the contrary Li attains ns² configuration by gaining an electron.

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tapanmast Vora ·2009-04-07 00:03:27

can sum1 giv a betr reason

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eureka123 ·2009-04-07 01:03:28

ok i got my mistake...................
i was calculating bond order whereas no bond was being formed........[3][3]

ans is Be becoz of one electron in p orbital.

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2002..why is my answer rong????

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