Which of the following is the correct IUPAC name for the compound (a) 4-trydroxy

Question

Which of the following is the correct IUPAC name for the compound (a) 4-trydroxy - 3 methyl-hexanoic acid (B) 3-hydroxy-2-ethyl-pentanoic acid (C) 3-methyl-4-hydroxy-peentyl carboxylic acid (D) 3-hydroxy-2-ethyl pentyl aldehyde (E) none of above Carboxylic acid can be prepare by oxidizing of the following compounds? 2* alcohol ketone aldehyde amine cycloalkane Which one of the following formula represents a monosaccharide? C_5H_10O_5 C_5H_5OH C_10H_20O_10 CH_3COCOOH C_6H_6O_6 The line formula of fructose (a ketose) is: How many chiral carbons are present in this molecule? 6 5 4 3 1 Which of the following statements about these two chemicals is INCORRECT?

Explanation / Answer

15) For IUPAC name we select the longest chain of carbon with the priority functional group, so the name will be suffixed as :oic acid

Here the group is carboxylic group and the number of carbons in the longest chain having that group = 6

so the name will be prefixed as Hex

The OH group is side group attached on 3rd carbon (will be named as hydroxy)

The methyl group is attached on 4th carbon

so complete name will be

3-hydroxy-4-methylhexanoic acid

16) Aldehydes on oxidation get carboxylic acid

Ketone : they will not oxidized easily

amine will not be oxidized to carboxylic acid

Cycloalkene will give ketone on oxidation

20 alcohol will also give ketone on oxidation

17) the general formula for monosacchrides is (C H2O)n

Answer: C5H10O5

18)The number of chiral carbons = 3 [only three carbons have all the four group different]

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