12th class (Fsc) Chemistry unit 13 MCQs
76. Acetic acid is maufactured by:
a. Ozonolysis
b. Distillation
c. Fermentation
d. None of these
77. Acetamide is prepared by:
a. Heating ethyl acetate
b. Heating ammonium acetate
c. The hydrolysis of methyl cyanide
d. Heating methyl cyamide
78. The solution of which acid is used for seasoning of food?
a. Formic acid
b. Benzoic acid
c. Acetic acid
d. Butanoic acid
79. When aqueous solution of sodium salt of fatty acid is electrolysed, we get:
a. Alkanone
b. Alkenes
c. Alcohol
d. Alkanes
80. When acetic acid react with ethyl alcohol in presence of cone. H2SO4 we get:
a. HCHO
b. CO
c. CH3COOC2H5
d. CO2
81. Which is most difficult to oxidize:
a. HCHO
b. C2H5CHO
c. CH3COCH3
d. CH3 CHO
82. The nature of glumatic acid is:
a. Neutral amino acid
b. Acidic amino acid
c. Slightly amino acid
d. Basic amino acid
83. Which test is applied to detect amino acid:
a. Lodoform test
b. Fehling’s test
c. 10% NaOH solution
d. Ninhydrin test
84. By convention a peptide having molecular mass upto 10,000 is called:
a. Protien
b. Peptide
c. Dipeptide
d. Polypeptide
85. The nature of lysine amino acid is:
a. Neutral
b. Acidic
c. Amphoteric
d. Basic
86. Acidic amino acid have maximum:
a. One amino group
b. Two carboxyl groups
c. Three carboxyle group, two amino groups
d. Two carboxyl groups, one amino group
87. Dipolar structure of Zwitterion is also called:
a. Internal salt
b. Double salt
c. External salt
d. Health salt
88. Which of the following is not an amino acid?
a. Alanine
b. Aspartic acid
c. Aniline
d. Lysine
89. CH3COOH + PCI5 → ? The products of the above reaction are:
a. CH3COI+POCI2 +HCL
b. CH3 COI+POCI3
c. CH3 COCI+POCI3 +H2
d. CH3 CI+POCI3 +HCI
90. CH3CN+CHL → A+B in the above reaction A and B are:
a. Acetic acid and ammonia
b. Acetic acid and acid amide
c. Acetic acid and ammonium chloride
d. Acetic acid and methyl chloride
91. Consider the following reaction: CH3 COOH +Mg → ? What product will form?
a. Magnesium ion
b. Magnesium formate
c. Carboxylate ion
d. Magnesium acetate
92. Primary alcohols normally give us aldehydes when oxidize in the presence of Na2Cr2O7 what the product will be, when the secondary alcohols are oxidized in same conditions?
a. Alkyl halides
b. Alkenes
c. Ketones
d. Alkynes
93. The formation of ester from acetic acid in presence of acid and ethanol is a:
a. Electrophilic substitution reaction
b. Necleoplic substitution
c. Electrophilic additional reaction
d. Necleoplic additional reaction
94. Metyle ayanides, on biling with mineral acids or alkalies yield:
a. Propanoic acid
b. Acetic acid
c. Butanoic acid
d. Formic acid
95. Ethyl butyrate and butyl butanoate are esters with the flavour of:
a. Pineapple
b. Pear
c. Apple
d. Banana
96. Acetamide is formed be dehydration of:
a. Butanoic acid
b. Oxalic acid
c. Propanoic acid
d. Ethanoic acid
97. An organic acid z reacts separately with sodium bicarbonates, sodium hydroxide and sodium carbonates. which one of the following represent the structure of z?
a. CH3CH2OH
b. HCOOC2 H5
c. H3C-CH2 – COOH
d. CH3 -CH=CH2
98. Carboxylic acids are rather hard to reduce, which powerful reducing agent can be used to convert then to the corresponding primary alcohol:
a. LiAIH4
b. H2SO4 /HgSO4
c. K2Cr2O7 /H SO4
d. V2O5
99. Which one of the following reaction of carboxylic acid is reversible?
a. Reaction with PCI5
b. Esterification
c. Reaction with SOCI2
d. Salt formation
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