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WorksheetsAnalytical Chemistry
Total questions: 15
Worksheet time: 5mins
What is Chromatography used for?
Separating mixtures of substances into their components
Identifying the charge of a compound
Calculating the enthalpy change
Identifying the Molecular Mass of a substance
chromatography separates the mixture of dyes on the basis of their ----------------------------
Density
Solubility
Gravity
Boiling Point
On the chromatogram given -------------- is mixture.
Red
Orange
Green
Black
A high Rf value indicates __________
strong affinity to the stationary phase
strong affinity to the mobile phase
no affinity to the stationary phase
no affinity to the stationary phase
In TLC substances are separated because of differences in_______. Tick all that apply.
Polarity
Molecular Size
Concentration
Electronegativity
How to calculate Rf?
Rf = distance traveled by sample / distance traveled by solvent
Rf = distance traveled by solvent / distance traveled by sample
HPLC stands for
High Performance Layer Chromatography
High Performance Liquid Chromatography
Highly Placed Liquid Chromatography
Hard Performance Liquid Chromatography
High pressure liquid chromatography can be performed only in columns.
True
False
Which form of chromatography does NOT utilize the mobile phase?
Paper
TLC
HPLC
Gas
What do the peaks on the mass spectrum represent?
anions
different isotopes
atoms with differing numbers of electrons
numbers of electrons
What do the heights of the peaks represent in the mass spectrum?
number of isotopes
relative abundance of each isotope
average atomic mass
charge:mass ratio
How many isotopes of this element are shown in the mass spectrum?
98
7
100
95.9 g/mol
Which of the following is the correct order?
Ion Source --> Mass Analyzer --> Ion Detector
Ion Source --> Ion Detector --> Mass Analyzer
Mass Analyzer --> Ion Source --> Ion Detector
How do you identify a low resolution NMR spectrum?
Shows multiple peaks for each non-equivalent hydrogen atom
Shows a single peak for each non-equivalent hydrogen atom
Shows multiple peaks for each non-equivalent carbon atom
Shows a single peak for each non-equivalent carbon atom
The exact ________ pattern of a peak depends on the number of hydrogen atoms on the adjacent carbon atom/s
Analyzing
Splitting
Fusion
Intensity
