Synthetic Materials


Which one of the following is the petroleum wax?

A. Paraffin wax
B. Jonoba wax
C. Carnauba wax
D. Bees wax


The type of glass used in making lenses and prisms is

A. jena glass
B. soft glass
C. pyrex glass
D. flint glass


Soap is a mixture of sodium or potassium salts of

A. dicarboxylic acids
B. monocarboxylic acids
C. glycerol
D. tricarboxylic acids


Gypsum is added to cement clinker to

A. increase the tensile strength of cement
B. decrease the rate of setting of cement
C. facilitate the formation of colloidal gel
D. bind the particles of calcium silicate


Paper is manufactured by

A. Wood and resin
B. Wood, sodium and bleaching powder
C. Wood, calcium, hydrogen sulphite and resin
D. Wood and bleaching powder