18. In the a) a loss e) a gain of oxygen oxidation of alcohol to a ketone, there

Question

18. In the a) a loss e) a gain of oxygen oxidation of alcohol to a ketone, there is of hydrogen b) a loss of oxygen e) a loss of carbon d) a gain of hydrogen 19. What classification of alcohol is resi a) primary b) secondary c) tertiary 20. Why has diethyl ether been replaced as a It causes unpleasant side effect in many patients e) nome b) It is slightly polar e)lt can d) quaternary hydrogen bond to water d) It is not very reactive )It is slightly soluble in water 21. Methanol is used in all the following except a) making plastics b) racing fue)alcoholic beverages d solventepaint remover 22. 1,2-ethanediol (ethylenediol) has uses include a) antifreeze b) solvent for paint c)production of synthetic fiber e) All the above. d) solvent for ink 23. Ethylene glycol and methanol are toxic because they are by the liver to carboxylic acids. a) reduced b) protonated c) oxidized d) conjugated e) hydrated 24. What kind of bonds do alcohols form between individual molecules? a) covalent bonds b) hydrogen bonds c)carbon bonds d oxygen bonds e) ionic bonds bj aldabonyi c dsoadcdal 25. Thiols can be gently oxidized to a) disualndes 26. The reduction of the following ketone with hydrogen in the presence of a nickel catalyst will yield?. CH2 O CH3-CH-C-CH3 c) 3-methyl-2-butanol b) 2-methyl-2-butanol a) 3-methylbutanol d) 3-methyl-2-pentanol e) butanol 27. The product of adding two molecules of an alcohol to an aldehyde in the presence of an acid is a) acetal b) ether c) hemiacetal d) hemiether e) hydroxyl group

Explanation / Answer

18.

In the oxidation of alcohols,

there is a cleaage of bond between C-H & O-H.

So finally there is loss of hydrogen

So option "a" is correct

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