1
AIEEE 2011
MCQ (Single Correct Answer)
+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.
2
AIEEE 2011
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Boron cannot form which one of the following anions?
A
$$BH_4^-$$
B
$$BF_6^{3-}$$
C
$$B(OH)_4^-$$
D
$$BO_2^-$$
4
AIEEE 2009
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which one of the following reactions of Xenon compounds is not feasible?
A
XeO3 + 6HF $$\to$$ XeF6 + 3H2O
B
XeF6 + RbF $$\to$$ Rb(XeF7]
C
2XeF2 + 2H2O $$\to$$ 2Xe + 4HF + O2
D
3XeF4 + 6H2O $$\to$$ 2Xe + XeO3 + 12HF + 1.5O2
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