1. Which concentration of ethanol (ethyl alcohol) is the most effective as a disinfectant? A. 100% B. 70% C. 50% D. 25% 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
2. Which of the following method works primarily by denaturing proteins? A. Ultra filtration B. Heat C. UV radiation D. None of the above 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
3. Dioxins and furans are two toxic gaseous pollutants which can be measured by A. GC - MS B. TLC C. ICP - AES D. AAS 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
4. HEPA filters are used to filter A. Air B. Water C. Soil D. Milk 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
5. What is the relationship between resolving power of a microscope and wavelength? A. Shorter the wavelength, Higher the resolving power B. Longer the wavelength, Higher the resolving power C. There is no relationship D. Itdepends on the convexity of the eyepiece lens 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
6. Which of the following water purification technology removes minerals from drinking water? A. Filtration B. Ultra-filtration C. Reverse osmosis D. UV treatment Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
7. Which of the following techniques is most suitable for the estimation of organic or their residues? A. Gel electrophoresis B. Flame photometry C. Gas chromatography D. Atomic absorption Spectrophotometry Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
8. In which type of chromatography four modes viz., absorption, partition, ion exchange and exclusion, are present? A. HPLC B. Liquid - liquid chromatography C. Ion - exchange chromatography D. Adsorption chromatography 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
9. Which of the following is not a molecular method for detection of microbial population from waterl soil? A. Dot-blot hybridization B. MPN C. RT-PCR D. PCR 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
10. An ultraviolet light source is used in A. Phase - contrast microscope B. Dark field microscope C. Electron microscope D. Fluorescent microscope 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
