7. The major producto) in the product(s) in the following reaction is (are) CH,C

Question

7. The major producto) in the product(s) in the following reaction is (are) CH,CH2 OCHy CH CHyCH2 CH, OCH, CH3CH2 [A] Only I B) Only II ICJ A racemie miture of U) and !] D] None of these S. Which of the following represents the order of solvents in increasing polarity from left to right A) methanol, acetone, ethyl acetate, hexanes B) hexanes, ethyl acetate, acetone, methanol C) acetone, hexanes, methanol, ethyl acetate D) ethyl acetate, methanol, hexanes, acetone 9. In Thin Layer Chromatography (TLC) Re stands for A) Rate factor B) Refractive Index C) Retardation factor D) None of the above 10. Which of the following statements is(are) true? A) If a polar compound moves too slowly in a non-polar solvent, switching to a more polar solvent will cause the compound to move faster B) If a non polar cause the compound to move slower C) The polarity of a solvent system can be varied by mixing two solvents together D) All of the above compound moves too fast on a TLC plate switching to a less polar solvent will 11. An experiment resulted in the generation of approximately 30 mL of organic waste, whiclh is mostly chloroform CHCl. The correct method of disposal of this waste is to: A) Carefully pour it down the sink and subsequently flush with cold water B) Allow it to sit for a while in the fume hood for complete evaporation C) Pouring the material into a waste container designated for halogenated wastes. D) None of these

Explanation / Answer

7. Answer is option C

Recemic mixture will get

8. Answer is option B

Hexane is a non polar solvent. Actone is more polar than ethyl acetate and methanol is more polar than acetone.

9. Answer is option C

Retardation factor in TLC is the ratio of the distance travelled by a center of spot to the distance travelled by the solvent front.

10. Answer is option D

All are true only

11. Answer is option C

It should pour in to the waste container labelled as halogenated waste. It is a halogenated solvent. Doing the other options will make serious pollution.

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