1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
The anion of acetylacetone (acac) forms Co (acac)3 chelate with Co3+. The rings of the chelate are
A
five membered
B
four membered
C
six membered
D
three membered.
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
Accumulation of lactic acid (HC3H5O3), a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 M aqueous solution, lactic acid is 3.7% dissociates. The value of dissociation constant, Ka, for this acid will be
A
1.4 $$ \times $$ 10$$-$$5
B
1.4 $$ \times $$ 10$$-$$4
C
3.7 $$ \times $$ 10$$-$$4
D
2.8 $$ \times $$ 10$$-$$4
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
The outer electronic configuration of Gd (At. No. 64) is
A
4f5 5d4 6s1
B
4f7 5d1 6s2
C
4f3 5d5 6s2
D
4f4 5d5 6s1
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O?
A
A$$l$$ < Ca < O < C < F
B
A$$l$$ < O < C < Ca < F
C
C < F < O < A$$l$$ < Ca
D
Ca < A$$l$$ < C < O < F