11. Element contaminating the water body is determined and quantified by using one of the following methods A. Colorimeter B. Spectrophotometer C. Atomic absorption spectrometer D. All the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
12. Which of the following technique does not give a viable count? A. Most probable number B. Direct microscopic count C. Turbidometry D. Dry weight determination Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
13. The most effective germicidal wavelength of UV is A. 400 nm B. 260 nm C. 360 nm D. 260 rads Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
14. Which one of the following is used to study the structural details of biological tissues using freezefracture technique? A. Scanning electron microscopy B. Transmission electron microscopy C. Atomic force microscopy D. Phase contrast microscopy Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
15. Which of the following instruments is based on Bragg's law? A. AAS B. XRD C. Spectrophotometer D. Scanning electron microscope Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
16. Sedimentation efficiency depends on the relative strength of A. Drag versus centrifugal force B. Drag versus gravitational force C. Gravitational force versus centrifugal force D. Gravitational force versus electrostatic force Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
17. The typical temperature for autoclaving (operating at 15 pounds per square inch of pressure) is A. 121°C B. 100°C C. 63°C D. 200°C Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
18. To understand the 3D structure of the molecule following technique is called A. X - ray diffraction B. Atomic absorption spectrophotometry C. MPTLC D. GC - MS/MS Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
19. When certain types of molecules absorb UV energy, energy in the UV or visible regions is emitted as the excess energy. This phenomenon is known as A. Fluorescence B. Phosphoresce C. Transmittance D. Absorbance Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
20. The band labelled as UV - C which is lethal to microorganisms is A. 0.29 - 0.32 μm B. 0.2 - 0.29 μm C. 0.17 - 0.2 μm D. 0.07 - 0.21 μm Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
