1
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
The correct order of the decreasing ionic radii among the following isoelectronic species is
A
Ca2+ > K+ > S2$$-$$ > C$$l$$$$-$$
B
C$$l$$$$-$$ > S2$$-$$ > Ca2+ > K+
C
S2$$-$$ > Cl$$-$$ > K+ > Ca2+
D
K+ > Ca2+ > Cl$$-$$ > S2$$-$$
2
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and C$$l$$ ?
A
C$$l$$ < F < O < S
B
O < S < F < C$$l$$
C
F < S < O < C$$l$$
D
S < O < C$$l$$ < F
3
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
In which of the following pairs of molecules/ ions, the central atoms have sp2 hybridisation ?
A
NO$$_2^{ - }$$ and NH3
B
BF3 and NO$$_2^{ - }$$
C
NH$$_2^{ - }$$ and H2O
D
BF3 and NH$$_2^{ - }$$
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Which one of the following species does not exist under normal conditions?
A
Be2+
B
Be2
C
B2
D
Li2
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