WorksheetsRevision Test 1 Basic Instrumental Analysis (CHM260)
Total questions: 27
Worksheet time: 15mins
Magnetic resonance imaging (MRI) is an important analysis to generate picture of anatomy inside human body. The system functions at 8.00 x 10^2 MHz. What is the wavelength?
3.75 x 10^8 nm
2.79 x 10^13 nm
6.19 x 10^21 nm
403 x 10^11 nm
Magnetic resonance imaging (MRI) is an important analysis to generate picture of anatomy inside human body. The system functions at 8.00 x 10^2 MHz. What is the energy (E) in Joules per photon?
5.34 x 10^-16 J
5346 x 10^3 J
5.304 x 10^-25 J
5.403 x 10^23 J
Deviation of Beer's Law may due to :
Fundamental
Instrumental
Chemical deviation
All of answer
What is the fundamental deviation?
Real limitation to law
Polychomatic radiation of the spectra
Presents of stray radiation in spectra
Association and dissociation or reaction with the solvents in the sample
What is the instrumental deviation? (more than one answer)
Real limitation to law
Polychomatic radiation of the spectra
Presents of stray radiation in spectra
Association and dissociation or reaction with the solvents in the sample
The schematic diagram instrumentation for UV-Vis for...
single-beam instruments
double-beam instruments
triple-beam instruments
Multiple-beam instrument
What is the chemical deviation?
Real limitation to law
Polychomatic radiation of the spectra
Presents of stray radiation in spectra
Association and dissociation or reaction with the solvents in the sample
The diagram of instrumentation for UV-Vis which is refers to..
in-space double beam instruments
in-time double bean instruments
single beam instrument
in-spectrum instruments
The diagram of instrumentation for UV-Vis which is refers to..
in-space double beam instruments
in-time double bean instruments
single beam instrument
in-spectrum instruments
The peak of a hexane slightly shifted to a longer wavelength is UV-Vis absorption spectra. Predict the type of shifting.
Blue shift or hypsochromic shift
Red shift or bathochromic shift
Hyperchromic shift
Hypochromic shift
The peak of a hexane slightly shifted to a shorter wavelength is UV-Vis absorption spectra. Predict the type of shifting.
Blue shift or hypsochromic shift
Red shift or bathochromic shift
Hyperchromic shift
Hypochromic shift
The peak of a hexane slightly shifted to a greater absorbance is UV-Vis absorption spectra. Predict the type of shifting.
Blue shift or hypsochromic shift
Red shift or bathochromic shift
Hyperchromic shift
Hypochromic shift
The peak of a hexane slightly shifted to a shorter wavelength is UV-Vis absorption spectra. Predict the type of shifting.
Blue shift or hypsochromic shift
Red shift or bathochromic shift
Hyperchromic shift
Hypochromic shift
The peak of a hexane slightly shifted to a lower absorbance is UV-Vis absorption spectra. Predict the type of shifting.
Blue shift or hypsochromic shift
Red shift or bathochromic shift
Hyperchromic shift
Hypochromic shift
A calibration plot of a caffeine of with different concentration (ppm) represented by an equation of y = 6.13x + 0.91. Predict the concentration of caffeine of unknown buttercreme latte with absorbance 1.23.
0.052 ppm
5.234 ppm
6.235 ppm
52.23 ppm
A calibration plot of a aspartame of with different concentration (ppm) represented by an equation of y = 0.48x + 1.48. Predict the concentration of caffeine of unknown ube latte with absorbance 2.12.
3.11 ppm
1331 ppm
28.34 ppm
1.33 ppm
Determine the type of transition in glutaraldehyde.
n→π*
transitions
𝑛→𝜋*
transitions
3d and 4d transitions
σ→σ* transition
Determine the type of transition in methanol.
n→π*
transitions
𝑛→σ*
transitions
3d and 4d transitions
σ→σ* transition
Determine the type of transition in carboxylic acid.
n→π*
transitions
𝑛→𝜋*
transitions
3d and 4d transitions
𝜋→𝜋*
transition
Determine the type of transition in transition metal of Sc and Mo.
n→π*
transitions
𝑛→𝜋*
transitions
3d and 4d electrons
𝜋→𝜋*
transition
State the type of sample preparation in FTIR analysis that involve the addition of KBr, pressed the sample and finally transparent pellet is obtained.
Nujol Mull method
KBr pellet method
Grinding method
Mineral oil method
State the type of sample preparation in FTIR analysis that involve the grinding of the sample with mineral oil until suspension of finely ground sample formed. The sample then put between the salt plate.
Nujol Mull method
KBr pellet method
Grinding method
Compression method
Bonds with significant polarity (e.g., C=O, O-H, C-Cl) are inherently good IR active compound. State the reason.
They have a change in charge
They have a change in dipole moment
The have no net dipole moment
The have no charge
List down the possible bending mode in CO. (more than 1 answer)
scissoring
rocking
wagging
twisting
2-aminocyclohexane was analyzed using FTIR. What is the possible peak assigned in IR?
3500-3300 cm^-1
N-H
1400-1090 cm^-1
C-O
1600-1500 cm^-1
C=C
2260 - 2100 cm^-1
C triple C
Briefly explain why symmetrical compound CH=CH are IR inactive.
They has no dipole moment
They has two different charge
They has net dipole moment
They has cancelled of the charge
What is the possible peak for 2-butenal in FTIR? (multiple answer)
1670-1760 cm^-1
C=O
1600 cm^1
aromatic ring
1600-1500 cm^-1
C=C
2760-2700 cm^-1
C-H
