CSIR Chemical Sciences: Questions 241 - 244 of 427

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Question number: 241

» Inorganic Chemistry » Organometallic Compounds » Bonding and Structure and Reactivity

Appeared in Year: 2015

MCQ▾

Question

Reductive elimination of ArR (coupled product) from A is facile when:

Reductive elimination

Reductive Elimination

Image showing the Reductive elimination

(June)

Choices

Choice (4) Response

a.

R=CH2Ph

b.

R=CH2CF3

c.

RCH2COPh

d.

R=CH3

Question number: 242

» Inorganic Chemistry » Organometallic Compounds » Bonding and Structure and Reactivity

Appeared in Year: 2015

MCQ▾

Question

Following statements are given regarding CHIr agnostic interaction CHIr observed in Ir(PPh3)3Cl ________

  1. Upfield interaction CH proton in HNMR spectrum.

  2. Increased shift of CH proton of CH

  3. νCH in IR spectrum shifts to higher wavenumber

The correct answer is: (CSIR June)

Choices

Choice (4) Response

a.

1 and 3

b.

3 only

c.

2 and 3

d.

1 and 2

Question number: 243

» Physical Chemistry » Principles of Quantum Mechanics » Orbital and Spin Angular Momenta

Appeared in Year: 2012

MCQ▾

Question

For H2 molecule in excited state σg*,σu1, spin part of triplet state with ms=0 is proportional to (June)

Choices

Choice (4) Response

a.

α(1)α(2)

b.

[α(1)β(2)β(1)α(2)]

c.

α(1)β(2)

d.

[α(1)β(2)+β(1)α(2)]

Question number: 244

» Inorganic Chemistry » Organometallic Compounds » Bonding and Structure and Reactivity

Appeared in Year: 2016

MCQ▾

Question

Olefin hydrogenation using Wilkinson’s catalyst initiates with- (MHRD sample paper)

Choices

Choice (4) Response

a.

A phosphine addition to Rh(PPh3)2Cl

b.

A phosphine dissociation from Rh(PPh3)3Cl

c.

Olefin addition to Rh(PPh3)2Cl

d.

Olefin addition to Rh(PPh3)3Cl

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