JEE Main 2016 (Online) 10th April Morning Slot | d and f Block Elements Question 68 | Chemistry

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JEE Main 2016 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

-1

The transition metal ions responsible for color in ruby and emerald are, respectively :

Cr³⁺ and Co³⁺

Co³⁺ and Cr³⁺

Co³⁺ and Co³⁺

Cr³⁺ and Cr³⁺

JEE Main 2016 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

Which one of the following species is stable in aqueous solution ?

Cr²⁺

Cu⁺

MnO$$_4^{3 - }$$

MnO$$_4^{2 - }$$

JEE Main 2016 (Offline)

MCQ (Single Correct Answer)

-1

Which of the following compounds is metallic and ferromagnetic ?

CrO₂

VO₂

MnO₂

TiO₂

JEE Main 2015 (Offline)

MCQ (Single Correct Answer)

-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

$$\left( A \right) - \left( {ii} \right),\,\,\left( B \right) - \left( {iii} \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( i \right)$$

$$\left( A \right) - \left( {iii} \right),\,\,\left( B \right) - \left( i \right),\,\,\left( C \right) - \left( {ii} \right),\,\,\left( D \right) - \left( {iv} \right)$$

$$\left( A \right) - \left( {iii} \right),\,\,\left( B \right) - \left( {ii} \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( i \right)$$

$$\left( A \right) - \left( {ii} \right),\,\,\left( B \right) - \left( i \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( {iii} \right)$$

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