1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest $$E_{{M^{3 + }}/{M^{2 + }}}^0$$ value?
A
Mn (Z = 25)
B
Fe (Z = 26)
C
Co (Z = 27)
D
Cr (Z = 24)
2
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Which of the following complex species is not expected to exhibit optical isomerism?
A
[Co (en)2 Cl2]-
B
[Co (NH3)3 Cl3]
C
[Co (en) (NH3)2 Cl2]+
D
[Co (en)3]3+
3
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism:
A
tertiary alcohol by SN1
B
secondary alcohol by SN2
C
tertiary alcohol by SN2
D
secondary alcohol by SN1
4
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
A compound with molecular mass 180 is acylated with CH3COCl to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is:
A
2
B
5
C
4
D
6
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