How many structural isomers does xylenol, (CH_3)_2 C_6H_3OH, have? None i.e., th

Question

How many structural isomers does xylenol, (CH_3)_2 C_6H_3OH, have? None i.e., there it only 1 molecule 2 4 6 8 The monomer for polystyrene is shown below. Which of the bonds is involved in the polymerization process? Which of the following do you predict has the highest fuel value? benzene, C H cyclohexane, C_6H_12 I-hexene, C_6H_12 I-hexyne, hexane What type of amine is adrenaline, which is depicted below ? aromatic auxiliary primary secondary tertiary The alcohol functional group has the bonding arrangement COH COC AlOH COOH R O H, where R is any element.

Explanation / Answer

15. Structural isomers are the isomers in which the molecules have same molecular formula but different structures. So, xylenol has 6 structural isomes. The bonds can be rearranged and in total we get 6 isomers. Correct option is d.

16. Polystyrene synthesis involves the free radical mechanism for polymerisation of bond (IV) in styrene. The alkene bonds of benzene does not take part in polymerisation. Answer is d.

17. Benzene has highest calorific value, because it has highest percentage of C in the compound. As the number of hydrogens are increasing in the compound, the % of carbon will decrease. The answer is a.

18. The amine in adrenaline is secondary, because it is attached to two alkyl groups and one hydrogen. Answer is d.

19. In alcohols, the functional group is OH and it is attached to any alkyl group. It has to be connected too carbon. So, correct answer is COH. Option a is correct.

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