Question

Match the scientists and their contribution given in columns

Scientists	Contributions
(A) W. His	(p) X Ray crystallography
(B) Knoll and Ruska	(q) Column Chromatography
(C) Bragg	(r) Microtome
(D) Tswett	(s) SEM
	(t) TEM

• A. A - r, B - t, C - p, D - q
• B. A - s, B - t, C - r, D - p
• C. A - r, B - s, C - t, D - q
• D. A - p, B - t, C - s, D - q

Answer 1

The correct option is A A - r, B - t, C - p, D - q

The Transmission Electron Microscope (TEM) was developed by Knoll and Ruska in 1932.

Microtome, for obtaining thin sections of sample, was invented by W. His. The technique of X-ray crystallography is useful in study of detailed structure of biomolecules like hemoglobin, insulin, DNA, RNA etc. It was developed by Bragg, 1913.

Chromatography technique for separation of a mixture into its constituents was developed by Michael Tswett, 1906.