Question # 1

Which of the following is obtained by condensation polymerization?

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Polyethene

Teflon

Phenol formaldehyde resin

Nitrile rubber

What is not true about DNA

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It preserve genetic information

To relicates

Synthesized protein

It has a linear structure

Vegetable oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

In macromolecules DP stands for

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Dissociation parameter

Dissociation polymer

Degree of polymerization

None of these

The polymers which can not be re-softened again and again are called

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Thermoplastic

Thermosetting

Both a and b

None

Which is a protein?

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Nylon

Rayon

Natural silk

Terylene

Enzymes are catalysts which contain other than carbon and hydrogen one other element

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Oxygen

Sulphur

Phosphorus

Iodine

Enzymes are chemically

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Carbohydrates

Proteins

Fatty acids

Phospholipids

Protein may have

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Primary structure

Secondary structure

Tertiary structure

All of these

Vegetables oils are:

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Essential oils obtained form plants

None of these

Polymer formation from monomers starts by

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Condensation reaction between monomers

Coordination reaction between monomers

Conversion of monomer to monomer ions by protons

Hydrolysis of monomers

The reaction between fat and NaOH is called:

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Esterification

Hydrogenolysis

Fermentation

Sponification

Bakelite is a product formed form

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Reaction of formaldehyde with phenol

Reaction of polyethylene with phenol

Reaction of polypropylene with acid

It is a natural product

Cotton has cellulose in it:

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96%

97%

98%

99%

Peptide bond is a key feature in

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Polysaccharide

Proteins

Nucleotide

Vitamins

Monosaccharides are

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Aldoses

Ketoses

Either a and b

None of these

Which is not a steroid

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Cholesterol

Ergosterol

Phospholipids

None of these

Which of the following is a constituent of nylon?

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Adipic acid

Styrene

Teflon

None of these

Which of the following is a water soluble vetamin?

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Niacin

Riboflavin

Trypsin

Ascorbic acid

The simplest separating unit of a polymer is called:

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Monomer

Dimer

Trimmer

Macromer

The degree of unsaturation in fats or oils is usually measured by numbers of grams of iodine required by 100 grmas of fat, this is called

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Oil number

Saturation number

Iodine number

Un saturation number

The product of addition polymerization reaction is

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PVC

Nylon

Terylene

Polyamide

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

The fibre which is made form acrylonitrile as monomer

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

An example of water soluble vitamin is

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Vitamin D

Vitamin E

Vitamin A

Vitamin C

Which of the following is not present in nucleotide?

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Guanine

Cytosine

Adenine

Tryoxine

Among the following polymers, the strongest molecular forces are present in

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Elastomers

Fibres

Thermoplactics

Thermosetting polymers

Glycine at pH7 has the structure

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H₂N -- CH₂-- COOH

H₃N⁺-- CH₂-- COOH

H₂N -- CH₂COO^-

H₃N⁺-- CH₂-- COO^-

Natural rubber is a polymer of

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Butadiene

Ethyne

Styrene

Isoprene

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

Which of the following has ester linkage?

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Nylon

Bakelite

Terylene

PVC

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