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nylon polyamides synthetic fibre forming polyamides are also termed as nylons. therefore nylon is well known in the textiles. nylons are those
thermoplastic these polymer gets soften on heating and can be converted into any shape that they can retain on cooling. such polymers that soften on
q. compare pot furnace and tank furnace used in manufacture of glass.ans.s.no.pot furnacetank furnace1.used for special glasses optical glasses
q. describe the manufacturing process of glass.ans. manufacturing process of glass1. melting raw materials in proper properties
q. write an account of soda lime glass and safety glasses.ans. soda-lime glass or soft glass it is the ordinary glass in which na2o is added to
silica glass it is produced by heating pure sand to its melting point. because of absence of refining agents it is extremely difficult to get rid of
optical glass they contain phosphorous as replacement for most of all the silica and lead silicate containing a little cao2 the latter is capable of
borosilicate glass in this boric anhydride is used in place of lime. this glass generally contains 75-81 silica 10-13.5 b2o3 4.5-6 na2o and 2-5
laminated glass sheets of glass fibre fabric or glass wool are soaked in a solution of a thermosetting plastic and placed one above other the
glass glass is amorphous solid which is not true solid it is rather super cooled liquid which possesses a very high viscosity. it has no fixed
q. describe properties and uses of different silicate glasses and also discuss the importance of annealing in the manufacture of
radioactive decay is a process whereby unstable nuclei change into more stable nuclei by emitting particles of different kinds. alpha beta and
q. what are ion selective membranes used in electro dialysis of brackish water. give examples.ans. electro dialysis for brackish water the ion
q. name the various steps required for making water suitable for domestic use.ans. treatment process for domestic uses. no.process use for
atoms with the different numbers of neutrons and same atomic number are known as isotopes. the chemical properties of an element are determined
nuclei contain uncharged neutrons and positively charged protons these two particles with about the same mass are known as nucleons. the number
q. why is sodium aluminates is a better coagulates then ferrous sulphates or alum?ans. sodium aluminates naalo2 it is better coagulant than feso4
electrons and nuclei the familiar planetary model of the atom was proposed by rutherford in 1912 following experiments by geiger and marsden
q. name of the reagent required for determination of hardness of water sample of complex metric method. briefly give the function of each reagent
purification of raw water for domestic use involve following process1 screening the raw water is passed through
q. what are the characteristics of drinking water? sol. characteristics of drinking water1 it should be
q. a sample of water on analysis was found to contain the following analytical datamg hco33 16.8mgl mgcl2 19mglmg no32 29.6 ppm caco3 20 ppmmgso4
q. describe the ion exchange process of softening hard water. what are its advantages? ans.determination of ion exchange or deionization
q. a sample of water analysis was found to contain temporary magnesium hardness 25 mgl. permanent magnesium chloride hardness 15 mgl and permanent
q. write phosphate conditioning method for water softening with suitable chemical reactions. how it is different from soda lime