Important Questions Q1 Borate glazes are preferred over the silicate glazes. Ans: The borate glazes are preferred over the silicate glazes because the borate glasses are more fusible and possess higher cofficient of enpansion than the borate glass. Q2 What is vitreous sillica ? Give two uses. Ans: When the crystline sillica is heated at suffciently high temrature it melts to give the visous liquid having randon sutructure which on cooling does not readily crystllize and become rigid without having undergone the orientation into regular crystal pattern is is called viterous sillica. Q3 Four uses of Sodium Sillicate. Ans: It is used as filler for soap in soap industry It is use in textile as fire proof It is used as furniture polish It is used in colico printing Q4 Give reaction of Al with nitric acid. Ans: Aluminium does not react with any concentration of NHO3, probably beacause of formation of
Comments
Post a Comment