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1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
In which of the following pairs of molecules/ions, both the species are not likely to exist?
A
$$H_2^+$$ , $$He_2^{2-}$$
B
$$H_2^-$$ , $$He_2^{2-}$$
C
$$H_2^{2+}$$ , $$He_2$$
D
$$H_2^-$$ , $$He_2^{2+}$$
2
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Stability of the species Li2, $$Li_2^−$$ and $$Li_2^+$$ increases in the order of:
A
Li2 < $$Li_2^+$$ < $$Li_2^-$$
B
$$Li_2^+$$ < $$Li_2^-$$ < Li2
C
$$Li_2^-$$ <$$Li_2^+$$ < Li2
D
$$Li_2^-$$ < Li2 < $$Li_2^+$$
3
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
In which of the following pairs the two species are not isostructural ?
A
$$CO_3^{2-}$$ and $$NO_3^-$$
B
$$PCl_4^{+}$$ and $$SiCl_4$$
C
PF5 and BrF5
D
$$AlF_6^-$$ and $$SF_6$$
4
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
Among the following the maximum covalent character is shown by the compound :
A
SnCl2
B
AlCl3
C
MgCl2
D
FeCl2
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