The Rubin number with was proposed by Ostwald as an alternative to the Gold number in order to measure the protective efficiency of a lyophillic colloid may be difined as the

The Rubin number with was proposed by Ostwald as an alternative to the

1.	The Rubin number with was proposed by Ostwald as an alternative to the Gold number in order to measure the protective efficiency of a lyophillic colloid may be difined as the
Answer» mass in milligrams of a colloid per 100 c.c. of solution which just prevent the colour change of STANDARD sol of dye Congo-Rubin FORM red to violet when 0.16 G eq. KCl is added to it. mass in milligrams of a colloid per 100 c.c. of solution which just prevent the colour change of standard sol of dye Congo-Rubin form red to violet when 0.1 M KCl is added to it. mass in milligrams of a colloid per 100 c.c. of solution which just prevent the colour change of standard sol of dye Congo-Rubin form red to violet when 0.2 M KCl is added to it. mass in milligrams of a colloid per 100 c.c. of solution which just prevent the colour change of standard sol of dye Congo-Rubin form red to violet when1M KCl is added to it. Answer :A