1
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
The colour of KMnO4 is due to :
A
d – d transition
B
L $$\to$$ M charge transfer transition
C
$$\sigma$$ – $$\sigma$$* transition
D
M $$\to$$ L charge transfer transition
2
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Match the catalysts to the correct processes :

Catalyst Process
(A) TiCl3 (i) Wacker process
(B) PdCl2 (ii) Ziegler - Natta
polymerization
(C) CuCl2 (iii) Contact process
(D) V2O5 (iv) Deacon's process
A
$$\left( A \right) - \left( {ii} \right),\,\,\left( B \right) - \left( {iii} \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( i \right)$$
B
$$\left( A \right) - \left( {iii} \right),\,\,\left( B \right) - \left( i \right),\,\,\left( C \right) - \left( {ii} \right),\,\,\left( D \right) - \left( {iv} \right)$$
C
$$\left( A \right) - \left( {iii} \right),\,\,\left( B \right) - \left( {ii} \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( i \right)$$
D
$$\left( A \right) - \left( {ii} \right),\,\,\left( B \right) - \left( i \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( {iii} \right)$$
3
JEE Main 2014 (Offline)
MCQ (Single Correct Answer)
+4
-1
Which series of reactions correctly represents chemical relations related to iron and its compound?
A
Fe $$\buildrel {dil.\,{H_2}S{O_4}} \over \longrightarrow $$ FeSO4 $$\buildrel {{H_2}S{O_4},{O_2}} \over \longrightarrow $$ Fe2(SO4)3 $$\buildrel {heat} \over \longrightarrow $$ Fe
B
Fe $$\buildrel {{O_2} \, {, heat}} \over \longrightarrow $$ FeO $$\buildrel {dil.\,{H_2}S{O_4}} \over \longrightarrow $$ FeSO4 $$\buildrel {heat} \over \longrightarrow $$ Fe
C
Fe $$\buildrel {{Cl_2} \, {, heat}} \over \longrightarrow $$ FeCl3 $$\buildrel {heat, \, air} \over \longrightarrow $$ FeCl2 $$\buildrel {Zn} \over \longrightarrow $$ Fe
D
Fe $$\buildrel {{O_2},\,heat} \over \longrightarrow $$ Fe3O4 $$\buildrel {CO,\,{{600}^o}C} \over \longrightarrow $$ FeO $$\buildrel {CO,\,{{700}^o}C} \over \longrightarrow $$ Fe
4
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)
JEE Main Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12