The catalyst used in the manufacture of polyethene by Zeigler method is:

lithuim tetrachloride and triphenyl aluminium

titanium tetrachloride and triethyl aluminium

Which of the following statements is not true?

Some disinfectants can be used as antiseptic at low concentration

Aspirin is analgesic and antipyretic

Sulphadiazine is a synthetic antibacterial

Which of the following statements is not correct?

Allergic conditions are cured by antihistamines

Hormones are continuously produced but not stored in the body

The functions of the white blood cells is to protect the body against infections

Catabolism involves degradation of molecules

Select the detergent that is used to prepare cosmetics.

Cetyltrimethylammonium chloride

Atiseptics are different from disinfectants as:

antiseptics merely inhibit the growth and disinfectant kill the micro-organism

antiseptics are used against micro-organsims while disinfectants are used against insects

antiseptics are used only over skin while disinfectants can be taken orally also

antiseptics are used over living tissues while disinfectants cannot be used over living tissues

Give the monomers of nylon-66.

Ethylene glycol and erephthalic acid

Hexamethylenediamine and adipic acid

Which one of the following is not a correct match?

Polymers : Orlon Monomers : Glycerol, phthalic anhydride

Polymers : Flexiglass Monomers : Methyacrylate

Polymers :Teflon Monomers : Tetrafluoroethylene

Polymers : Buna S Monomers : Styene, 1,3 butadiene

Which one of the following statements is not true?

Buna S is a copolymer of butadiene and styrene

Natral rubber is a 1,4 polymer of isoprene

In vulcanization the formation of sulphur bridges between different chains makes rubber harder and stronger

Natural rubber has the trans-configuration at every double bond

Which of the following statements is not correct?

Caprolactum is the monomer of nylon 6,6.

Phenol formaldehyde resin is known as bakelite

Which of the following statements is false?

Nylon-66 is an example of elastomer

The repeat unit in natural rubber is isoprene

Both strach and cellulose are polymers of glucose

Artifical silk is derived from cellulose

Choose the correct statement.

Saccharin is 650 times sweeter than sugar

Alitame is 2000 times sweeter than sugar

Sucralose is 160 times sweeter than sugar

Aspartame is 550 times sweeter than sugar

Which one of the following pairs is not correctly matched?

Terylene-condensation polymer of terephthalic acid and ethylene glycol

Teflon-thermally stable cross linked polymer of phenol and formaldehyde

Perspex-a homopolymer of methyl methacrylate

Synthetic rubber-a copolymer of butadiene and styrene

The bakelite is made from phenol and formaldehye. The initial reaction between the two compounds is an example of:

aromatic electrophilic substiution

aromatic nucleophilic substitution

What is not true about polymers?

Polymers do not carry any charge

Polymers have low molecular weights

Which one of the following substances is a good detergent in water?

Hexadecyltrimethyl ammonium chloride

Palmitic acid (hexadecanoic acid)

Cetyl palmitate (hexadecyl hexadecanoate)

Select the incorrect statement.

Equanil is used to control depression and hypertension

Agonists are drug targets which mimic chemical messenger

A 0.2% solution of phenol is an antiseptic while its 1.0% solution is a disinfectant

A drug which kills the organism in the body is called bacteriostatic.

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