Acetophenone d. Benzaldehyde e. Aniline 01 The following observations are freque
ID: 693406 • Letter: A
Question
Acetophenone d. Benzaldehyde e. Aniline 01 The following observations are frequently made in the laboratory. In each case below state brief terms, the deduction or deductions which may be made as to the nature of the compoun under study. a. A water-soluble composnd turns red ütmus blue. When a smail piece af sodium metal was place in a test tube containing a liquid unknow small stream of bubbles was observed :. An unknown liquid compound turned a dark roddish Jones reagent green. :. When an unknowa liquid compound was shaken with Tollens reagent in a small test tube silver mirror appeared on the isside botom of the test tube. e. An unknown compound decoladized a solution of bromine and methylene chlorideExplanation / Answer
ANSWER
A . The water soluble colpound may be a base. Because a base turns red litmus blue.
B ;; The liquid in the test tube is water, that undergoes exothermic reaction with water to fotm sodium hydroxide and hydrogen gas.
C ;; The unknown liquid may be a primary, secondary alcohol or an aldehyde. Because Jones reagent (CrO3) oxidises primary, secondary alcoholsand aldehydes and changes its color from orange red to greenish.
D. The compound is an aldehyde.
E. The liquid is ana unsaturated carbon compound. Because unsaturated compounds add bromine and hence decolorise it.