Instrumental Methods of Analysis - Inorganic Chemistry - Chemistry Previous Year Questions

1

2008 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2008

If ClF₃ were to be stereochemically rigid, its ¹⁹F NMR spectrum (I for ¹⁹F = ½) would be (assume that Cl is not NMR active)

A

a doublet and a triplet

B

a singlet

C

a doublet and a singlet

D

two singlets

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2

2008 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2008

The oxidation state of the metal ion in the catalyst can be detected by

A

atomic absorption spectroscopy

B

Mössbauer spectroscopy

C

HPLC

D

gas chromatography

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3

2008 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2008

For butyrophenone (PhCOCH₂CH₂CH₃), the most probable fragmentation observed in the electron impact ionization (EI) mass spectrometry is

A

B

C

D

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4

2009 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2009

2.5 g of an iron compound upon suitable treatment yielded 0.391 g of iron(III) oxide. The percentage of iron in the compound is
(atomic weight of Fe: 55.847, O: 15.994)

A

10.94

B

12.15

C

11.31

D

9.11

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5

2009 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2009

Two samples have been given to you : [NiCl2(PPh3)2] and [PdCl2(PPh3)2]. A physical method that can be used to identify these compounds unambiguously is

A

HPLC

B

magnetic susceptibility

C

¹³C NMR spectroscopy

D

Mössbauer spectroscopy

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6

2012 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2012

A metal chelate that can be used for separation and quantitative analysis of aluminium ions by gas chromatography is

A

EDTA

B

ethylene glycol

C

dinonyl phthalate

D

trifluoroacetylacetone

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7

2012 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2012

From a carboxymethyl-cellulose column at pH 6.0, arginine, valine and glutamic acid will elute in the order

A

arginine, valine, glutamic acid

B

arginine, glutamic acid, valine

C

glutamic acid, arginine, valine

D

glutamic acid, valine, arginine

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8

2012 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2012

The extent of Mössbauer quadrupole splitting of iron follows the order

A

FeCl₂·4H₂O > K₃[Fe(CN)₆(NO)] > FeCl₃·6H₂O

B

K₃[Fe(CN)₆(NO)] > FeCl₂·4H₂O > FeCl₃·6H₂O

C

FeCl₃·6H₂O > K₃[Fe(CN)₆(NO)] > FeCl₂·4H₂O

D

FeCl₂·4H₂O > FeCl₃·6H₂O > K₃[Fe(CN)₆(NO)]

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9

2013 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2013

Polarographic method of analysis to obtain individual amounts of Cu²⁺ and Cd²⁺ in a given mixture of the two ions (Cu²⁺ and Cd²⁺) is achieved by measuring their

A

half-wave potentials

B

migration currents

C

decomposition potentials

D

diffusion currents

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10

2014 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2014

In atomic absorption spectroscopy, the atomization process utilizes

A

flame

B

electric field

C

magnetic field

D

electron beam

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11

2019 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2019

The number of CO stretching bands in IR spectrum of trigonal bipyramidal cis-M(CO)₃L₂ is __________.
(M = metal and L = monodentate ligand)

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12

2024 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2024

In the EPR spectrum of an aqueous solution of \(VOSO_4\) at room temperature, the total number of hyperfine splitting signals is

A

3

B

7

C

5

D

8

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13

2007 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2007

A student recorded a polarogram of 2.0 mM Cd²⁺ solution and forgot to add KCl solution. What type of error do you expect in his results?

A

Only migration current will be observed

B

Only diffusion current will be observed

C

Both migration current as well as diffusion current will be observed

D

Both catalytic current as well as diffusion current will be observed

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14

2007 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2007

Match the observed principal absorptions in the visible spectrum shown in List I with the bond that shows this absorption in List II

A

i, b-ii, c-iii, d-iv

B

i, b-iii, c-ii, d-iv

C

ii, b-i, c-iv, d-iii

D

iv, b-ii, c-iii, d-i

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15

2010 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2010

Hari (H), Gita (G), Irfan (I) and Saira (S) are siblings (i.e. brothers and sisters). All were born on 1st January. The age difference between any two successive siblings (that is born one after another) is less than 3 years. Given the following facts: i. Hari's age + Gita's age > Irfan's age + Saira's age ii. The age difference between Gita and Saira is 1 year. However, Gita is not the oldest and Saira is not the youngest. iii. There are no twins. In what order were they born (oldest first)?

A

HSIG

B

SGHI

C

IGSH

D

IHSG

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16

2017 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2017

The characteristic feature of an electron spin resonance (ESR) spectrum of frozen aqueous solution of CuSO₄·5H₂O at 77 K is

A

g_|| > g_⊥

B

g_|| < g_⊥

C

g_|| = g_⊥

D

g_x ≠ g_y ≠ g_z

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17

2018 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2018

In a detailed study of annual crow births in India, it was found that there was relatively no growth during the period 2002 to 2004 and a sudden spike from 2004 to 2005. In another unrelated study, it was found that the revenue from cracker sales in India which remained fairly flat from 2002 to 2004, saw a sudden spike in 2005 before declining again in 2006. The solid line in the graph below refers to annual sale of crackers and the dashed line refers to the annual crow births in India. Choose the most appropriate inference from the above data.

A

There is a strong correlation between crow birth and cracker sales.

B

Cracker usage increases crow birth rate.

C

If cracker sale declines, crow birth will decline.

D

Increased birth rate of crows will cause an increase in the sale of crackers.

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18

2022 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2022

In differential thermal analysis (DTA)

A

the temperature differences between the sample and reference are measured as a function of temperature

B

the differences in heat flow into the reference and sample are measured as a function of temperature

C

the change in the mass of the sample is measured as a function of temperature

D

the glass transition is observed as a sharp peak

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19

2026 · Chemistry · Inorganic Chemistry · Instrumental Methods of Analysis

Chemistry (CY) 2026

The correct statement(s) about Mössbauer spectroscopy of iron compounds is(are)

A

⁵⁷Co is used as a source

B

Their Mössbauer spectra are obtained using γ-ray with resonance energy of 14.4 keV

C

K₃[Fe(CN)₅NO] shows large quadrupole splitting

D

Isomer shift of FeSO₄·7H₂O is smaller than that of K₃[Fe(CN)₆]

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