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1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The correct order of increasing bond length of C $$-$$ H, C $$-$$ O, C $$-$$ C and C$$=$$C is
A
C $$-$$ H < C$$=$$C < C $$-$$ O < C $$-$$ C
B
C $$-$$ C < C$$=$$C < C $$-$$ O < C $$-$$ H
C
C $$-$$ O < C $$-$$ H < C $$-$$ C < C$$=$$C
D
C $$-$$ H < C $$-$$ O < C $$-$$ C < C$$=$$C
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals, NO$$_2^ - $$. NO$$_3^ - $$, NH$$_2^ - $$, NH$$_4^ + $$, SCN$$-$$?
A
NO$$_2^ - $$ and NO$$_3^ - $$
B
NH$$_4^ + $$ and NO$$_3^ - $$
C
SCN$$-$$ and NH$$_2^ - $$
D
NO$$_2^ - $$ and NH$$_2^ - $$
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The pairs of species of oxygen and their magnetic behavior are noted below. Which of the following presents the correct description?
A
O$$_2^ - $$, O$$_2^{2 - }$$ - Both diamagnetic
B
O+, O$$_2^{2 - }$$ - Both paramagnetic
C
O$$_2^{ + }$$, O2 - Both paramagnetic
D
O, O$$_2^{2 - }$$ - Both paramagnetic
4
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
In which of the following molecules the central atom does not have sp3 hybridization?
A
CH4
B
SF4
C
BF4$$-$$
D
NH4+
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