WorksheetsAnalytical techniques
Total questions: 13
Worksheet time: 17mins
Name
Class
Date
1.
In mass spectrometry, what is the charge on an ion formed?
a)
+1
b)
-1
c)
+2
d)
-2
2.
What are the steps of operation in the mass spectrometer?
a)
Accelerate, Deflect,Ionize, Detect
b)
Deflect,Ionize, Accelerate, Detect
c)
Ionize, Accelerate, Deflect, Detect
d)
Detect, Accelerate, Deflect, Ionize
3.
What substance does this mass spectra represent?
a)
hexane
b)
pentane
c)
butane
d)
pentene
4.
A molecule absorbs IR at a wavenumber of 1720 cm-1. Which functional group could account for this absorption.
I. aldehydes
II. esters
III. ethers
I. aldehydes
II. esters
III. ethers
a)
I only
b)
I and II
c)
I, II and III
d)
none of the above
5.
What part of the atom or molecule does infrared radiation affect
a)
the nucleus
b)
the electrons
c)
the bonds
d)
the charge
6.
A molecule has a broadband at 3200cm-1 and sharp band at 1711cm-1. the molecule is most likely an
a)
amide
b)
ester
c)
alkanol
d)
carboxylic acid
7.
The mobile phase in paper chromatography is typically a
a)
plasma
b)
solid
c)
gas
d)
liquid
8.
Separation in GC occurs in the ____
a)
Gas tank
b)
Oven
c)
Detector
d)
Column
9.
A low retention time indicates
a)
a high affinity to the mobile phase
b)
a low affinity to the stationary phase
c)
a high solubility in the mobile phase
d)
all of the above
10.
Which of these compounds is taken as standard for recording chemical shift?
a)
Dimethylsilane
b)
Trimethylsilane
c)
Tetramethylsilane
d)
Methylsilane
11.
Which molecule will produce the following spectra with 3 different H environment?
a)
CH3CH2OH
b)
CH3CH2COOH
c)
CH3CH2CHO
d)
CH3COOCH2OH
12.
Which molecule will produce the following spectra with 2 different H environment ?
a)
CH3CH2COCH2CH3
b)
CH3CH2COOCH2CH3
c)
CH3CH2CH2CH3
d)
CH3CH2CH2CH2CH3
13.
Which molecule will produce the following spectra with 2 different H environment ?
a)
(CH3)2CH2COH
b)
(CH3)3COOH
c)
(CH3)3CHO
d)
CH3CH2CH2CH2CH3
100 %
