Modern Material and Chemicals Flashcards
Porcelain is made for making crockery which is itself being prepared by:
ClaY
Ceramics bear properties of:
(a) High melting and boiling point
(c) Chemically unreactive
hard
Materials which can retain their strength above 550°C are known as
Ceramics
Synthetic Polymers?
Plastic
poly means
Meros mean
many
Parts
Bakelite is a good:
Insulator
Natural substances made up of long molecules are:
Rubber and Wool
Long chains of atoms are linked by:
Carbon
________is a synthetic fibre used for making woollen clothesd
Acrylic
Synthetic fibres are made using________as raw materials.
Petrochemicals
Fibre obtained by chemical treatment of wood pulp is called
Rayon
Nylon is obtained by _
Mixing coaL air and water
_________is polyester used for making bottles, utensils, films
PET
Three dimensional molecules with cross links are formed in the case of a
Thermosetting plastic
If a substance such as heavy metals, pesticides accumulates in a body for a long time, it
will be:
(a) Passed out through egestion
(c) Become insoluble in water
(d) Passed on to next consumer in food chain
(d) Passed on to next consumer in food chain
