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8. In the below hydropathy plot of a protein, positive values are regions of the protein that are considered hydrophobic based on primary amino acid sequence. What type of protein […]

7. At 25 °C and zero ionic strength, water self-dissociation results in: Kw = [H3O+][OH-] = 1.0×10−14 If it is known that Kw increases with increasing temperature, what will be […]

6. Using the bond energy data given in the parenthesis, what would be the expected enthalpy for the following reaction H2(g) + F2 (g) à 2HF (g) (H-H: 432 kJ/mol; […]

5. 8.4 mg NaHCO3 powder was slowly added to 10 ml 0.03 M HCl in a 50ml beaker with stirring. After all effervescence has seized, what should be the pH […]

4. CH3CHO and C6H5CH2CHO can be distinguished chemically by: a. Tollen’s reagent test b. Fehling solution test c. Benedict test d. Iodoform test CH3CHO (acetaldehyde) and C6H5CH2CHO (phenylacetaldehyde) can be […]

3. Which amino acid may produce following titration curve profile? a. Phe b. His c. Val d. Leu Histidine is the amino acid that produces the given titration curve with […]

2. The pKa of a monobasic organic acid is 4.2. The pH at which 95% of the acid will be in ionized form is: a. 5.02 b. 5.38 c. 2.92 […]

1. 700 ml of colourless solution is present in each of two bottles, A and B. The label on A reads, 1 M NaCl, while that on B reads 1 […]

15. The velocity of blood in an artery can be determined using the Doppler effect with ultrasound. Blood in an artery is moving directly towards a piezoelectric transducer, which emits […]

14. Unpolarized light is incident on a pair of ideal linear polarizers whose transmission axes make an angle of 45° with each other. The transmitted light intensity through both polarizers […]