1
IIT-JEE 1990
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+1
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The shape of [CH3]+ is _____.
2
IIT-JEE 1982
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+1
-0
____ hybrid orbitals of nitrogen atom are involved in the formation of ammonium ion.
3
IIT-JEE 1981
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The angle between two convalent bonds is maximum in ________. (CH4, H2O, CO2)
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