CSIR Chemical Sciences: Questions 88 - 92 of 329

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Question number: 88

» Inorganic Chemistry » Chemical Periodicity

Appeared in Year: 2011

MCQ▾

Question

Correct order of stability of difluorides is (June)

Choices

Choice (4) Response

a.

CF2 > SiF2 > GeF2

b.

SiF2 > GeF2 > CF2

c.

CF2 > GeF2 > SiF2

d.

GeF2 > SiF2 > CF2

Question number: 89

» Inorganic Chemistry » Bioinorganic Chemistry » Oxygen Transport

Appeared in Year: 2015

MCQ▾

Question

The Fe-N prophynin bond distances in deoxy and oxy-haemoglobin respectively are: - (June)

Choices

Choice (4) Response

a.

2.1and2.0A

b.

2.0and2.0A

c.

2.2and2.3A

d.

2.3and2.5A

Question number: 90

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

Appeared in Year: 2013

MCQ▾

Question

Identify order-representing increasing πacidity of following ligand. C2F4,NEt3COandC2H4

Choices

Choice (4) Response

a.

CO<C2F4<C2H4<NEt3

b.

C2H4<NEt3<CO<C2F4

c.

C2F4<C2H4<NET3<CO

d.

NEt3<C2H4<C2F4<CO

Question number: 91

» Inorganic Chemistry » Bioinorganic Chemistry » Oxygen Transport

Appeared in Year: 2012

MCQ▾

Question

Oxidation state of iron in methemoglobin: (June)

Choices

Choice (4) Response

a.

Four

b.

One

c.

Two

d.

Three

Question number: 92

» Inorganic Chemistry » Bioinorganic Chemistry » Metalloenzymes

Appeared in Year: 2012

MCQ▾

Question

Based on behaviour of metalloenzyme: -

  1. In enzymes, Zn activates O2 to form peroxide species.

  2. In enzymes, Zn activates H2O and provides a Zn bound hydroxide.

  3. In oxidases, Iron activates O2 to break bonding between two oxygens.

  4. Zn acts as nucleophile and attacks peptide. (Dec)

Choices

Choice (4) Response

a.

2 and 3

b.

3 and 4

c.

1 and 4

d.

1 and 2

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