Question

Alkene (X) $\left(C_5{H}_{1}0\right)$ on ozonolysis gives a mixture of two compounds (Y) and (Z). Compound (Y) gives positive Fehling's test and iodoform test. Compound (Z) does not give Fehling's test but give iodoform test. Compounds (X), (Y) and (Z) are?

• A. $X=C_6{H}_{5}COC{H}_3,Y=C{H}_{3}CHO,Z=C{H}_{3}COC{H}_3$
• B. $X=C{H}_3-CH=\underset{C{H}_3}{\underset{|}{C}}-C{H}_3,Y=C{H}_{3}CHO,Z=C{H}_{3}COC{H}_3$
• C. $X=C{H}_{3}C{H}_{2}CH=C{H}_2,Y=C{H}_{3}C{H}_{2}CHO,Z=HCHO$
• D. $X=C{H}_3-CH=CH-C{H}_3,Y=C{H}_{3}CHO,Z=C{H}_{3}CHO$

Answer 1

The correct option is B $X=C{H}_3-CH=\underset{C{H}_3}{\underset{|}{C}}-C{H}_3,Y=C{H}_{3}CHO,Z=C{H}_{3}COC{H}_3$

Compound B gives positive Fehling's test. It shows that it is an aldehyde and gives iodoform test which shows it has $COC{H}_3$ group. Compounds C is a ketone because it does not give Fehling's test but gives iodoform test which shows its also has $COC{H}_3$ groups.