MCQ NO.1163 | IMA
Why is a mono-energetic radiation source required in X-ray fluorescent spectrometer?
Why is a mono-energetic radiation source required in X-ray fluorescent spectrometer?
Anonymous Quiz
32%
To provide good sensitivity
32%
To provide high accuracy
20%
To provide a proper range
16%
To reduce unwanted background
MCQ NO.1164 | IMA
Which of the following does not make the X-ray tube nearly monochromatic?
Which of the following does not make the X-ray tube nearly monochromatic?
Anonymous Quiz
20%
Transmission-anode X-ray tube
39%
Secondary fluorescence target
28%
Slit
13%
Filters
MCQ NO.1165 | IMA
Which of the following components make use of a thin metal foil to isolate a nearly mono-energetic excitation beam?
Which of the following components make use of a thin metal foil to isolate a nearly mono-energetic excitation beam?
Anonymous Quiz
32%
Transmission-anode X-ray tube
32%
Secondary fluorescence target
23%
Slit
12%
Filters
MCQ NO.1165 | IMA
Energy dispersive system uses which of the following detectors?
Energy dispersive system uses which of the following detectors?
Anonymous Quiz
17%
Optical detector
41%
Semiconductor detector
25%
Thermistor
16%
Bolometer
MCQ NO.1166 | IMA
In Energy dispersive system, the energy level and the number of pulses is related to which of the following?
In Energy dispersive system, the energy level and the number of pulses is related to which of the following?
Anonymous Quiz
14%
Amount of sample, element involved
41%
Element involved, concentration of the element
33%
Concentration of the element, element involved
12%
Number of atoms, amount of sample
MCQ. NO.1167 | IMA
The analysis of X-ray beam by diffraction is similar to spectrum analysis carried out with a diffraction grating.
The analysis of X-ray beam by diffraction is similar to spectrum analysis carried out with a diffraction grating.
Anonymous Quiz
76%
True
24%
False
MCQ NO.1168 | IMA
The crystal used as X-ray grating has _______ dimensional lattice arrays?
The crystal used as X-ray grating has _______ dimensional lattice arrays?
Anonymous Quiz
14%
One
39%
Two
40%
Three
7%
Four
MCQ NO.1169 | IMA
Which of the following can be done to avoid loss of intensities of X-rays due to absorption of long wavelength X-rays?
Which of the following can be done to avoid loss of intensities of X-rays due to absorption of long wavelength X-rays?
Anonymous Quiz
14%
Apparatus must be contained in a chamber
51%
Air in the chamber must be replaced by helium
23%
Inert gas atmosphere must be provided
11%
Proper slits must be used
MCQ NO.1170 | IMA
In curved crystal arrangement, angular velocity of the crystal is twice that of the detector.
In curved crystal arrangement, angular velocity of the crystal is twice that of the detector.
Anonymous Quiz
76%
True
24%
False
MCQ NO.1171 | IMA
Which of the following is the disadvantage of silicon semiconductor detector?m
Which of the following is the disadvantage of silicon semiconductor detector?m
Anonymous Quiz
11%
Low stable
60%
Can be operated only at low temperatures
16%
Have low count-rate
13%
Low resolution
MCQ NO.1172 | IMA
If Hydrogen and air are used in burner how many °C temp. is produced ?
If Hydrogen and air are used in burner how many °C temp. is produced ?
Anonymous Quiz
20%
1900°C
37%
2200°C
24%
2300°C
20%
2100°C
MCQ NO. 1173 | IMA
Which is not application of flame photometry ?
Which is not application of flame photometry ?
Anonymous Quiz
16%
To estimate sodium, magnesium, calcium.
44%
Assay of metformin.
28%
Used to determine magnesium and calcium in cement.
12%
To detected metalic ions in sample.
MCQ NO.1174 | IMA
BOLTZMANN Equations is
BOLTZMANN Equations is
Anonymous Quiz
27%
N* / N =R Ae–∆E/kT
32%
N* / N = e–∆E/kT
36%
N* / N = Ae–∆E/kT
5%
N* / N = Ae–∆E/kc
MCQ NO.1175 | IMA
Choose correct sequence of flame photometry ?
Choose correct sequence of flame photometry ?
Anonymous Quiz
33%
Sample residue → excited state atoms → Return in ground state → Emission of radiation
38%
Sample residue → ground state → excited state → Emission of radiation
16%
Emission of radiation → excited state →ground state → Sample residue
13%
Sample residue → ground state → excited state → Emission of radiation
MCQ NO 1176 | Pharmaceutical engineering
Aniline is separated from aniline-water mixture using ____________.
Aniline is separated from aniline-water mixture using ____________.
Anonymous Quiz
38%
Fractional distillation
17%
Steam distillation
18%
Fractional crystallisation
27%
All of the above
MCQ NO 1177 | Pharmaceutical engineering
What type of mixture is collected in round bottom flask after passing through a steam generator?
What type of mixture is collected in round bottom flask after passing through a steam generator?
Anonymous Quiz
24%
Mixture of non-volatile organic compound and water
33%
Mixture of volatile organic compound and water
31%
Mixture of non-volatile inorganic compound and steam
13%
Mixture of volatile organic compound and steam
MCQ NO 1178 | Pharmaceutical engineering
Steam distillation process is used to separate substances which are ____________.
Steam distillation process is used to separate substances which are ____________.
Anonymous Quiz
6%
Steam volatile
37%
Steam volatile and immiscible with water
27%
Steam volatile and miscible with water
30%
All of the above
MCQ NO 1179 | Pharmaceutical engineering
When does the organic compound be present in the upper solvent layer in differential extraction?
When does the organic compound be present in the upper solvent layer in differential extraction?
Anonymous Quiz
39%
It is always present in the upper layer
27%
Before the extraction
19%
During the extraction
15%
After the extraction
MCQ NO 1180 | Pharmaceutical engineering
Which of the following property is not possessed by the organic solvent required to separate organic compound with water?
Which of the following property is not possessed by the organic solvent required to separate organic compound with water?
Anonymous Quiz
18%
It is immiscible with water
47%
Organic compound is more soluble in it
25%
It is less volatile than water
11%
It is easily vaporisable
MCQ NO 1181 | GATE 2001
In the glucuronidation reaction of OXAZEPAM-the functional group responsible is
In the glucuronidation reaction of OXAZEPAM-the functional group responsible is
Anonymous Quiz
25%
(a) OH
46%
(b) COOH
20%
(c) SH
8%
(d) NH2