JEE Main 2016 (Offline) | d and f Block Elements Question 167 | Chemistry

1

JEE Main 2016 (Offline)

MCQ (Single Correct Answer)

+4

-1

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

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

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