21. All the following are electron donating groups except: A. -NH2 B. -OH C. -OCH3 D. NO2 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
22. The source of radiation used in Infra red spectroscopy . . . . . . . . A. Nernst glower B. Sodium lamp C. Deuterium discharge lamp D. Tungsten lamp 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
23. If an organic compound does not absorb UV visible radiation it does not means compound does not contain: A. Sigma bond B. Single bond C. Conjugated double bond D. Dative bond 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
24. Most widely used solvent in HPLC is: A. Hexane B. Water C. Methanol D. None 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
25. Which of the below detector works on wheatstone bridge principle? A. FID B. UV C. TCD D. Photomultiplier 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
26. The end point in the assay was determined by A. Conductometric method B. Using an indicator C. Potentiometric method D. Photometric method 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
27. Which of the following detectors used in gas chromatography are mass flow sensitive? A. Thermal conductivity B. Flame ionization C. Photo ionization D. Electron capture 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
28. Nuclear magnetic moment is not shown by A. 13C B. 16O C. 1H D. 15N 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
29. The chemical shift value is A. Proportional to field strength B. Not Proportional to field strength C. Ratio of no of protons in each group D. Proportional to total no of protons 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
30. The factors affecting diffusion current in the polarography is denoted by A. Nernst equation B. Iikovic equation C. Lamberts law D. Mark-Houwink equation 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