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Aldehydes Ketones and Carboxylic Acids Test - 24

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Aldehydes Ketones and Carboxylic Acids Test - 24
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  • Question 1
    1 / -0
    Carbonyl group of aldehyde and ketone contain ________ groups.
    Solution
    Aldehyde and ketone formula are RCHOR-CHO, R(C=O)RR-(C=O)-R
    Thus, they contain carbon and oxygen in their groups.
  • Question 2
    1 / -0
    Which of the following IUPAC name will be used to name carboxylic acid functional group?
    Solution
    The following IUPAC name will be used to name carboxylic acid functional group is -oic acid.
    Hence option B is correct.
  • Question 3
    1 / -0
    The carboxylic acid includes the functional group:
    Solution
    The carboxylic acid includes the functional group carboxyl and hydroxyl group
    Hence option C is correct.
  • Question 4
    1 / -0
    Acetyl chloride cannot be obtained by treating acetic acid with:
    Solution
    CH3COOHPCl3CH3COCl+POCl+HClCH_3COOH \xrightarrow {PCl_3} CH_3COCl +POCl +HCl

    CH3COOHPCl5CH3COCl+HCl+POCl3CH_3COOH \xrightarrow {PCl_5} CH_3COCl +HCl+POCl_3

    CH3COOHSOCl2CH3COCl+SO2+HClCH_3COOH \xrightarrow {SOCl_2} CH_3COCl +SO_2 +HCl

    With chloroform acetyl chloride cannot be formed with acetic acid.
  • Question 5
    1 / -0
    Which of the following compounds are not soluble in water?
    Solution
    Formaldehyde, acetaldehyde and acetone all are water soluble. These are polar molecules and dissolve in polar solvent. Water is a polar solvent.
  • Question 6
    1 / -0
    IUPAC name of HOOCCH2C(OH)(COOH)CH2COOHHOOCCH_2C(OH)(COOH)CH_2COOH is
    Solution
    Correct IUPAC name of given compound is 2-Hydroxy-1,2,3-propanetri-carboxylicacid. Citric acid is its common name.
  • Question 7
    1 / -0
    What is the IUPAC name of CH3CH=CHCOOHCH_3CH=CH-COOH?
    Solution
    $$\overset{4}{C}H_3 \overset{3}{C}H= \,^{2}CH- \,^{1}COOH$$
    But2ene1oicacid But-2-ene-1-oic \, acid
  • Question 8
    1 / -0
    What is the common name of CH2=CHCOOHCH_2=CHCOOH?
    Solution
    Common name of CH2=CHCOOHCH_2=CHCOOH is acrylic acid.
  • Question 9
    1 / -0
    The compound XX on oxidation gives a mixture of acetic acid and formic acid, while YY on oxidation forms only propionic acid. XX and YY are :
    Solution
    The compound XX on oxidation gives a mixture of acetic acid and formic acid, while YY on oxidation forms only propionic acid. XX and YY are CH3 COCH3\displaystyle CH_3  - CO - CH_3 and CH3CH2CHO\displaystyle CH_3 - CH_2 - CHO respectively.

    CH3 COCH3oxidationCH3COOH+HCOOH\displaystyle CH_3  - CO - CH_3 \xrightarrow {\text {oxidation}} CH_3-COOH + H-COOH
    CH3CH2CHOoxidationCH3CH2COOH\displaystyle CH_3 - CH_2 - CHO \xrightarrow {\text {oxidation}} CH_3-CH_2-COOH

    Option C is correct
  • Question 10
    1 / -0
    As the carbon chain increases in aldehyde and ketone compounds, solubility in water:
    Solution
    As the carbon chain increases in aldehyde and ketone compounds, solubility in water decreases.
    Thus, aldehydes and ketones with few carbon atoms are water soluble whereas the one having several CC atoms are water insoluble. With increase in the number of CC atoms, the hydrophobic part of molecule increases. Hence, water solubility decreases.
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