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271. Microspectrophotometry analyses chemicals with the help of
A. Emission spectra
B. Absorption spectra
C. Ability to form gaseous components
D. Both A and C
Explanation:
272. The specimen for scanning electron microscope is first super cooled in liquid propane at
A. - 20°C
B. - 60°C
C. - 120°C
D. - 180°C
Explanation:
273. Magnification of a microscope having objective lens of 45 X and eye piece of 15 X would be
A. 350 X
B. 675 X
C. 2275 X
D. 1475 X
Explanation:
274. Detailed structure of biological molecules can be known with the help of
A. Atomic force microscope
B. Scanning probe microscope
C. Scanning tunneling microscope
D. All the above
Explanation:
275. The classroom technique used in separating different photosynthetic pigments from a pigment solution is
A. Paper chromatography
B. Column chromatography
C. Partition chromatography
D. Thin layer chromatography
Explanation:
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