1
AIEEE 2012
+4
-1
The molecule having smallest bond angle is :
A
NCl3
B
AsCl3
C
SbCl3
D
PCl3
2
AIEEE 2011
+4
-1
Which of the following statement is wrong ?
A
Nitrogen cannot form $$d\pi - p\pi$$ bond.
B
Single N – N bond is weaker than the single P – P bond
C
N2O4 has two resonance structures
D
The stability of hydrides increases from NH3 to BiH3 in group 15 of the periodic table
3
AIEEE 2011
+4
-1
Which of the following statements regarding sulphur is incorrect ?
A
The vapour at 200oC consists mostly of S8 rings
B
At 600oC the gas mainly consists of S2 molecules
C
The oxidation state of sulphur is never less than +4 in its compounds
D
S2 molecule is paramagnetic.
4
AIEEE 2011
+4
-1
Boron cannot form which one of the following anions ?
A
$$BH_4^-$$
B
$$BF_6^{3-}$$
C
$$B(OH)_4^-$$
D
$$BO_2^-$$
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