1
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
In a hydrogen atom, if energy of an electron in ground state is -13.6 eV, then that in the 2nd excited state is
A
-1.51 eV
B
-3.4 eV
C
-6.04 eV
D
-13.6 eV
2
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
In which of the following species the interatomic bond angle is 109o28' ?
A
NH3, BF4-
B
NH4+, BF4-
C
NH3, BF3
D
NH2-1, BF3
3
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
Hybridisation of underline atom changes in
A
$$\underline {Al} {H_3}$$ changes to $$AlH_4^-$$
B
$${H_2}\underline O $$ changes to $$H_3O^+$$
C
$$\underline N {H_3}$$ changes to $$NH_4^+$$
D
in all cases
4
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following are arranged in an increasing order of their bond strengths?
A
$$O_2^-$$ < O2 < $$O_2^+$$ < $$O_2^{2-}$$
B
$$O_2^{2-}$$ < $$O_2^-$$ < $$O_2$$ < $$O_2^{+}$$
C
$$O_2^-$$ < $$O_2^{2-}$$ < $$O_2$$ < $$O_2^{+}$$
D
$$O_2^{+}$$ < $$O_2$$ < $$O_2^-$$ < $$O_2^{2-}$$
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