CSIR (Council of Scientific & Industrial Research) Chemical Sciences: Questions 113 - 117 of 427

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Question number: 113

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

Appeared in Year: 2012

MCQ▾

Question

For the molecule

Structure of molecule given here

Structure of Molecule Given Here

Structure of molecule given here

Choose the correct option at room temperature.

  1. ’HNMR has singlets at 5.48 and 3.18 ppm

  2. ’HNMR has multiplet at 5.48 and singlet 3.18 ppm

  3. IR has CO stretching bands at 1950 and 1860

  4. IR has only one CO stretching bend at 1900 correct pair of statement.

Choices

Choice (4) Response

a.

1 and 4

b.

2 and 3

c.

1 and 3

d.

2 and 4

Question number: 114

» Inorganic Chemistry » Structure and Bonding in Homo-and Heteronuclear Molecules (VSEPR Theory)

Appeared in Year: 2011

MCQ▾

Question

In molecules, and ________ (June)

Choices

Choice (4) Response

a.

Bond distances are same.

b.

Shapes are same.

c.

Hybridization is same.

d.

Bond angles are same.

Question number: 115

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

Appeared in Year: 2012

MCQ▾

Question

In a cluster total no. of involved in its formation.

Choices

Choice (4) Response

a.

72

b.

60

c.

57

d.

63

Question number: 116

» Inorganic Chemistry » Structure and Bonding in Homo-and Heteronuclear Molecules (VSEPR Theory)

Appeared in Year: 2011

MCQ▾

Question

Among , , and , the number & species having 2 lone pairs of electrons on the central atom according to VSEPR theory is (June)

Choices

Choice (4) Response

a.

0

b.

3

c.

2

d.

4

Question number: 117

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

Appeared in Year: 2013

MCQ▾

Question

Though cyclobutadine is highly unstable, & readily polymerises in its free state, its transition metal complexes could be isolated because

Choices

Choice (4) Response

a.

It gains stability due to formation of

b.

It engages in long-range interaction with transition metal.

c.

Its polymerization ability reduces in presence of transition metal.

d.

It becomes stable in presence of transition metals due to formation of.

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