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1. Coalescence in emulsion is prevented by:

A. Phase inversion B. Decreasing size of droplets C. Decreasing viscosity of the continuous phase D. All of the above

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2. Formation of crystal along with entrapped solvent is called:

A. Amorphous B. Hydrate C. Pseudopolymorphism D. Solvate

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3. Which of the following drugs inhibits peripheral COMT and is used to increase the bioavailability of L-dopa?

A. Carbidopa B. Selegiline C. Entacapone D. Pramipexole

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4. Gentamicin is obtained from:

A. Micromonospora purpurea B. Streptomyces griseus C. Bacillus subtilis D. Streptomyces spheroids

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5. Allenes exhibit optical isomerism due to the presence of:

A. Asymmetric carbon atom B. Cumulated double bond C. Conjugated double bond D. Isolated double bond

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6. Which of the following would react faster with N-bromosuccinimide?

A. Benzene B. Toluene C. Methane D. Pyridine

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7. The nucleophilicity of different halide ions in polar aprotic solvent is:

A. F⁻ > Cl⁻ > Br⁻ > I⁻ B. F⁻ < Cl⁻ < Br⁻ < I⁻ C. F⁻ = Cl⁻ = Br⁻ > I⁻ D. Cl⁻ > Br⁻ > I⁻ > F⁻

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8. OsO4 is used for the dihydroxylation of alkenes. The stereochemistry of the two hydroxyl groups is:

A. Vicinal and syn B. Geminal and syn C. Vicinal and anti D. None of the above

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9. What should come in place of the question mark (?) in the following number series:
22, 66, 132, 792, ?

A. 1584 B. 2376 C. 1246 D. 2674

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10. Supramolecular chemistry is:

A. Chemistry beyond the molecule B. Involves non-covalent interactions C. Both (A) and (B) D. None of the above

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11. Given below are words, three of which belong to the same category. Find the word which does not belong to that category:

A. Danger B. Peril C. Jeopardy D. Innocuous

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12. The number of bacteria in a test tube doubles every 3 minutes. If at the end of 1 hour there are NNN bacteria in the test tube, at the end of how many minutes were there exactly N/4 bacteria?

A. 51 B. 54 C. 56 D. 58

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13. There is plenty of room at the bottom. This was stated by:

A. Isaac Newton B. Albert Einstein C. Richard Feynman D. Eric Drexler

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14. α,β-unsaturated carbonyl compounds undergo a ring closure reaction with conjugated dienes. The reaction is called as:

A. Hofmann Reaction B. Perkin Reaction C. Diels-Alder Reaction D. Cope Rearrangement

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15. Which of the binary systems form an ideal solution?

A. Benzene and Toluene B. Acetic acid and water C. Dichloromethane and water D. Acetone and ethanol

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16. The polydispersity index is:

A. Ratio of mass average molar mass to number average molar mass B. Ratio of number average molar mass to mass average molar mass C. Sum of mass average molar mass to number average molar mass D. Equal to mass average molar mass

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17. The phosphorescence spectrum of the excited species is due to:

A. Singlet to triplet transition B. Triplet to singlet transition C. Vibrational mode D. Electron spin transition

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18. The property which depends upon the number rather than the nature of the dissolved particles in a solution is called:

A. General B. Colligative C. Isotonic D. Isoelectronic

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19. Filter aid is used:

A. To increase the rate of filtration B. To decrease the pressure drop C. To increase the porosity of cake D. As a support base for the system

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20. What is the ratio of the actual mesh dimension of a Taylor series to that of the next smaller screen?

A. 1 B. √2 C. 1.5 D. 3