12th class (Fsc) Chemistry unit 14 MCQs
76. Plastic are a pollution problems because many plastics?
a. Burn to produce toxic fumes
b. Are made form petroleum
c. Decompose to produce toxic products
d. Are very inflammable
77. The fiber which is made from acrylonitrile as monomer:
a. Acrylic fiber
b. PVC
c. Polyester fiber
d. Rayon fiber
78. A polymeric sunstance that is formed in the liquid state and then hardened to a rigid solid is called:
a. Varnish
b. Fiber
c. Polyamide resin
d. Plastic
79. Vegetables oils are:
a. Glycerides of saturated fatty acids
b. Unsaturated fatty acids
c. Essential oils obtained from plants
d. Glycerides of Unsaturated fatty acids
80. Which one of the following elements is not present in all proteins?
a. Nitrogen
b. Carbon
c. Sulphur
d. Hydrogen
81. Which one of the following nitrogeneous bases is not present in RNA?
a. Thiamine
b. Cytosine
c. Uracil
d. Adenine
82. Which one of the following enzymes brings about the hydrolysis of fats?
a. Zymase
b. Urease
c. Lipase
d. Maltase
83. The reaction between fat and NaOH is called:
a. Fermentation
b. Esterification
c. Saponification
d. Hydrogenolysis
84. Which one of the following statetments about glucose and sucrose is incorrect?
a. Both are soluble in water
b. Both are neturally occurring
c. Both are carbohydrates
d. Both are disaccharides
85. Degree of polymerization is useful in the:
a. Calculating the molecular masses of polymers
b. Structure determination of polymers
c. Classification of polymers
d. Calculating the mass of repeating units
86. Nylon 6,6 is obtained by heating hexamethylenediamine with:
a. Vinyl chloride
b. Adipicacid
c. Acrylic acid
d. Acetic acid
87. Which of these polymer is an addition polymer?
a. Terylene
b. Nvion-6,6
c. Epoxy resin
d. Polystyrene
88. Polymerization of acryonitrile give:
a. Acrylic fiber
b. PVC
c. Polyester
d. Rayon
89. The fiber, made from acrylonitrile as monomer:
a. Acrylic fiber
b. PVC
c. Polyester fiber
d. Rayon fiber
90. The fiber,which is made from acrylonitrile as monomer is:
a. Acrylic fiber
b. PVC
c. Rayon fiber
d. None of these
91. Starch is:
a. Polysaccharides
b. Monosaccharide
c. Protein
d. Oligosaccharide
92. Which one is a disaccharide?
a. Fructose
b. Glucose
c. Cellulose
d. Sucrose
93. Which is not a polymer?
a. Protein
b. Starch
c. Dipeptide
d. Glucose
94. Which of the following enzymes brings about the hydrolysis of fats:
a. Zymas
b. Urease
c. Lipase
d. Maltase
95. Enzyme used for the diagonsis of obstructive jaundice is:
a. Lipase
b. LDH-1
c. L-Asparaginase
d. None of these
96. When hexane dioic acid is heated with hexamethylene diamine, the compound formed is:
a. Addition polymer
b. Polypeptide
c. Nylon 6,6
d. Ester
97. Glucose and fructose are common examples of:
a. Hexoses
b. Pentoses
c. Butoses
d. Heptoses
98. The reaction between fats and caustic soda is called:
a. Fermentation
b. Hydrogenolysis
c. Saponification
d. Carboxylation
99. Macromolecules are described as large molecules built up from small repeating units known as:
a. Isomers
b. Monomers
c. Tautomer
d. Meta meres
100. Polyvinyl chloride is an example of:
a. Condensation polymer
b. Addition polymer
c. Thermosetting polymer
d. Biopolymer