1
JEE Main 2016 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following compounds is metallic and ferromagnetic ?
A
CrO2
B
VO2
C
MnO2
D
TiO2
2
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
3
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
$$\left( A \right) - \left( {ii} \right),\,\,\left( B \right) - \left( i \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( {iii} \right)$$
4
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
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