wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

UV quiz SKS

Total questions: 75

Worksheet time: 56mins

Name
Class
Date
1.
Which of the following type of electromagnetic  radiation has the longest wavelength
a)
infrared
b)
ultraviolet
c)
microwaves
d)
radiowaves
2.

2. . Which of the following is an application of molecular spectroscopy?

a)

a) Structural investigation

b)

b) Basis of understanding of colors

c)

c) Study of energetically excited reaction products

d)

d) All of the mentioned

3.

Which of the following has three types of hydrogens in the following compounds?

a)

Br-CH = CH2

b)

CH3 – CH2 – CH3

c)

C6H5CH2

d)

CH3– CH2 – CH(CH3) – N02

4.

How many Hertz does 1 ppm correspond to for an PMR spectrometer operating at a radio frequency of 60 MHz and 100 MHz?

a)

6 Hz, 10 Hz

b)

60 Hz, 100 Hz

c)

100 Hz, 60 Hz

d)

10Hz, 100Hz

5.

The distance between the centers of the peaks of doublet is called as?

a)

Coupling constant

b)

Spin constant

c)

Spin-spin coupling

d)

Chemical shift

6.

Which of the compound is taken as standard for recording chemical shift?

a)

Dimethylsilane

b)

Trimethylsilane

c)

Tetramethylsilane

d)

Methylsilane

7.

Which of the following would not give singlet signal in NMR?

a)

Ethane

b)

Dimethylether

c)

Diethylether

d)

Acetone

8.

The phenomenon in which resonance of proton A is said to have been split by proton B is known as

a)

Spin-spin splitting

b)

Coupling constant

c)

Chemical shift

d)

Spin Constant

9.

How many NMR signals would be given by the compound (CH3)2CHCH2CH3

a)

1

b)

2

c)

3

d)

4

10.

The wavelength of an absorption is 495 nm. In what part of the electromagnetic spectrum does this lie?

a)

Radiowave

b)

Infrared

c)

Ultraviolet-visible

d)

Microwave

11.

A solution of a dye absorbs light of wavelength 480 nm, and for this absorption, the extinction coefficient is 18600 dm3 mol–1 cm–1. A sample of the dye of unknown concentration is placed in an optical cell of path length 1 cm and the absorbance reading is 0.18. What is the concentration of the solution?

a)

3.0 × 10–4 mol dm–3

b)

0.026 mol dm–3

c)

2.0 × 10–8 mol dm–3

d)

9.7 × 10–6 mol dm–3

12.
Which molecule will produce the following spectra with 3 different H environment?
a)
CH3CH2OH
b)
CH3CH2COOH
c)
CH3CH2CHO
d)
CH3COOCH2OH
13.
Which molecule will produce the following spectra with 2 different H environment ?
a)
CH3CH2COCH2CH3
b)
CH3CH2COOCH2CH3
c)
CH3CH2CH2CH3
d)
CH3CH2CH2CH2CH3
14.
NMR can only be done with 
a)
molecules
b)
1H and 13C
c)
any element with a odd number of protons
d)
any element with a odd number of nucleons
15.
The number of peaks in 13C NMR  for CH3 CH2 CH3 is
a)
0
b)
1
c)
2
d)
3
16.
The splitting pattern for the Hydrogen on the carbon at the end in high resolution 1H NMR  for CH3 CH2 CH3  
a)
a sextet
b)
a heptet
c)
a triplet
d)
isa quartet
17.
Splitting occurs only in 
a)
low resolution H NMR
b)
high resolution H NMR
c)
low resolution C NMR
d)
high resolution C NMR
18.
How many different H enviroment for molecule shown?
a)
2 Hydrogen environment, in (9.3) ratio
b)
4 Hydrogen environment, in (3.3.3.3) ratio
c)
1 Hydrogen environment, in (12) ratio
d)
2 Hydrogen environment, in (3.3) ratio
19.
How many different H environment for molecule shown?
a)
4 Hydrogen environment, in (1.1.3.3) ratio
b)
4 Hydrogen environment, in (1.1.3.6) ratio
c)
3 Hydrogen environment, in (1.1.6) ratio
d)
3 Hydrogen environment, in (1.1.3) ratio
20.

which of the following information is not given on an 1H NMR spectra?

a)

number of protons within that environment

b)

number of different environments a proton can be found in

c)

what might be on neighbouring atoms

d)

how much energy a bond absorbs

21.

which of the following could be NOT used as a solvent for 1H NMR?

a)

CDCl3

b)

D2O

c)

CHCl3

d)

CCl4

22.

How many carbon environments?

a)

1

b)

2

c)

3

d)

4

23.

How many carbon environments?

a)

1

b)

2

c)

3

d)

4

24.

How many carbon environments?

a)

1

b)

2

c)

3

d)

4

25.

How many carbon environments?

a)

1

b)

2

c)

3

d)

4

26.
Which molecule will produce the following spectra with one H environment?
a)
CH3CH2CH3
b)
CH3COOCH3
c)
CH3CH3
d)
CH3COCH3
27.
How many different H enviroment for molecule shown?
a)
2 Hydrogen environment, in (2.2) ratio
b)
4 Hydrogen environment, in (1.1.1.1) ratio
c)
1 Hydrogen environment, in (4) ratio
d)
2 Hydrogen environment, in (1.1.1.1) ratio
28.

How many carbon environments?

a)

1

b)

2

c)

4

d)

6

29.

How many carbon environments?

a)

1

b)

2

c)

3

d)

6

30.
NMR is used to determine
a)
the function groups present in inorganic molecules
b)
the molar mass of the compound
c)
the structure of the molecule
d)
the number of different carbon or hydrogen enviroments in the molecule
31.

Carbon 1 will have a signal at ... ppm

a)

~180 ppm

b)

~30 ppm

c)

~10 ppm

32.

Carbon 2 will have a signal at ... ppm

a)

~180 ppm

b)

~30 ppm

c)

~10 ppm

33.

Carbon 3 will have a signal at ... ppm

a)

~180 ppm

b)

~30 ppm

c)

~10 ppm

34.

Carbon 1 will have a signal at ... ppm

a)

~200 ppm

b)

~100 ppm

c)

~30 ppm

35.

Carbon 2 will have a signal at ... ppm

a)

~200 ppm

b)

~100 ppm

c)

~30 ppm

36.

Carbon 1 will have a signal at ... ppm

a)

~200 ppm

b)

~40 ppm

c)

~5 ppm

37.

Carbon 2 will have a signal at ... ppm

a)

~200 ppm

b)

~40 ppm

c)

~5 ppm

38.

Carbon 3 will have a signal at ... ppm

a)

~200 ppm

b)

~40 ppm

c)

~5 ppm

39.

This molecule will have ... peaks in it's 13C NMR spectrum

a)

1

b)

2

c)

3

d)

4

40.

This molecule will have ... peaks in it's 13C NMR spectrum

a)

1

b)

2

c)

3

d)

4

41.

Nuclear Magnetic Resonance (NMR) is a

a)

electroanalytical technique

b)

chromatography technique

c)

spectroscopy technique

d)

radioanalytical technique

42.

The lower the electron density around a nucleus,

a)

the lower it spin frequency

b)

the higher it spin frequency

c)

both correct

d)

any correct

43.

Signal multiplicity observed in NMR spectra is influenced by

a)

the electron density distribution in the molecule

b)

the interaction through the space between nuclei

c)

the interaction through the bond between nuclei

d)

the local magnetic field

44.

Arrange the various electronic transitions in the order of increasing energy.

a)

n→σ* < π→π* < n→π* < σ→σ*

b)

n→π* < π→π* < n→σ* < σ→σ*

c)

n→σ* < n→π* < π→π* < σ→σ*

d)

σ→σ* < π→π* < n→π* < n→σ*

45.

Which of the following is not an auxochrome group?

a)

–OH

b)

–SH

c)

–OR

d)

–O2

46.

Which of the following shift leads to the decreased intensity of absorption?

a)

Hypochromic

b)

Hyperchromic

c)

Hypsochromic

d)

Bathochromic

47.

Increase in the intensity of absorp in UV-Visible spectrum is called

a)

Hypsochromic

b)

Bathochromic

c)

Hyperchromic

d)

Hypochromic

48.

An absorption towards longer wavelength is called

a)

Bathochromic shift

b)

Hypsochromic shift

c)

Hyperchromic shift

d)

Hypochromic shift

49.

Methane molecule shows ------- electronic transition

a)

σ→σ*

b)

π→π*

c)

n→π*

d)

n→σ*

50.

An absorption towards shorter wavelength is called as

a)

Bathochromic shift

b)

Hypsochromic shift

c)

Hyperchromic shift

d)

Hypochromic shift

51.

In hyperchromic shift, extinction coefficient is

a)

Small

b)

Large

c)

No change

d)

None of the above

52.

In proton NMR spectroscopy, If the electron density around a proton decreases, the proton will be

a)

shielded

b)

deshielded

53.

When the electron density around a proton decreases,its chemical shift value in ppm units ......

a)

Increases

b)

Decreases

54.

The chemical shift value in ppm units is independent of operating frequency

a)

True

b)

False

55.

The range of chemical shift for 1HNMR spectroscopy is

a)

0-10 ppm

b)

0-15ppm

c)

0-200ppm

d)

0-20ppm

56.

A vinyl group can be predicted by the presence of ----- - in its proton NMR spectrum

a)

Three groups of 4 lines

b)

Three quartets

57.

Instead of the standard TMS, which standard below can be used in recording NMR spectrum?

a)

DSS

b)

DPPH

58.

Expansion of DSS

a)

1,1,-Dimethy Silapentane sulphonate

b)

Dihydrosilapentylsulphate

59.

If  ΔνJ≥10\frac{\Delta\nu}{J}\ge10  , the NMR spectrum will be a first order spectrum. Is this statement true?

a)

Yes

b)

No

60.

How will you note the chemical shift of a multiplet signal in an NMR spectrum

a)

Taking the mid point of the multiplet

b)

Taking the distance between two successive lines of a multiplet

61.

How will you note the coupling constant of a multiplet signal in an NMR spectrum

a)

By measuring the distance between two successive peaks of a multiplet

b)

By marking the mid point of the multiplet

62.

The presence of a doublet and a quartet in a 1H NMR spectrum indicates presence of

a)

CH CH3 group

b)

CH2 CH group

c)

CH2 CH CH2 group

d)

CH (CH3)2 group

63.

The presence of a doublet and a heptet indicates presence of

a)

CH (CH3)2 group

b)

C (CH3)3 group

64.

A triplet and a quartet in 1H NMR spectrum indicates presence of ------group

a)

Ethyl group

b)

Vinyl group

65.

If two protons couple to the same extent to neighbor protons,they are called ---------------

a)

magnetically equivalent

b)

chemically equivalent

66.

Chemical shift equivalence of the methylene protons in vinyl group can be proved by carrying out a ----test

a)

replacement test

b)

symmetry operation

67.

The NMR spectrum of commercial ethanol shows a triplet, a quartet and the OH group appears as a broadened singlet.

The reason for this is:

a)

The OH proton undergoes proton exchange reaction and does not take part in splitting the neighbor proton

b)

The OH proton is four bond away from the neighbor CH2 proton

68.

Deuterium exchange is done to convert a complex spectrum to a simple spectrum

(a)  

69.

When shift reagents are used to simplify a complex NMR spectrum, the signal of the proton in binding group gets

a)

Deshielded

b)

Shielded

70.

The signal of the OH proton remains in the same position in the 1HNMR spectrum of the molecule of salicylic acid even if concentration is increased.This indicates

a)

Intra molecular Hydrogen Bonding in Salicylic acid

b)

Inter molecular hydrogen bonding

71.

During double resonance, if we find unusual increase in signal intensity of a PMR signal, it indicates .................

a)

Nuclear Overhauser Effect

b)

Spin decoupling

72.

The relation giving number of peaks for a proton flanked by two chemically non equivalent protons is

a)

(2naI+1)(2nbI+1)

b)

n+1

c)

(na+1)(nb+1)

d)

2n+1

73.

What is the double bond equivalent of a molecule with molecular formula C4H10 O

a)

0

b)

1

c)

2

d)

3

74.

In solving problems in NMR spectroscopy you will be calculating DBE from the given molecular formula.

the simple formula for finding the DBE of a molecule is

a)

 C+1−H2−X2+N2C+1-\frac{H}{2}-\frac{X}{2}+\frac{N}{2}  

b)

 C+1−H2−X2−N2C+1-\frac{H}{2}-\frac{X}{2}-\frac{N}{2}  

75.

Choose the incorrect statement

a)

In CMR spectroscopy C - C coupling will not be seen

b)

C 13 nuclei is 1.1.percent abundant. Hence it has low sensitivity in NMR

c)

a proton attached to carbon will cause splitting of the carbon signals

d)

In broad band decoupling, one bond coupling interaction between carbon and proton is retained

Similar Resources on Wayground

chemistry act

77 questions

chemistry act

quiz

Worksheet

•

9th Grade - University

CHEMISTRY REVIEW

70 questions

CHEMISTRY REVIEW

quiz

Worksheet

•

10th Grade - University

Unit 1: Matter and Chemical Equations Review 8th Grade Science

73 questions

Unit 1: Matter and Chemical Equations Review 8th Grade Science

quiz

Worksheet

•

8th Grade - University

Nevada CRT Review 2015

75 questions

Nevada CRT Review 2015

quiz

Worksheet

•

KG - University

Chemistry Quiz

79 questions

Chemistry Quiz

quiz

Worksheet

•

University

Thermo Test Review

70 questions

Thermo Test Review

quiz

Worksheet

•

10th Grade - University

Calorimetry Quiz

73 questions

Calorimetry Quiz

quiz

Worksheet

•

University

Lecture 8 Pharm

70 questions

Lecture 8 Pharm

quiz

Worksheet

•

University