Question

Gold number is minimum in case of gelatin. If true enter 1 else enter 0

Answer 1

Hint: Gelatin is a compound composed of various elements. Carbon, hydrogen, nitrogen and oxygen contribute to the formation of gelatin. Gelatin is derived from collagen and it is also classified as a protein.


Complete step by step answer:
According to chemistry concepts the standard definition of gold number is following:
Gold number is the amount of protective colloid (in $mg$) which is just sufficient to prevent the coagulation of $10ml$ of a standard hydro gold sol when $1ml$ of $10\% NaCl$ solution is added to it.
The coagulation of gold sol is indicated by colour change from red to blue when particle size just increases.
The value of gold number for gelatin is $0.005 - 0.1$. Hence it is the best protective colloid among all the colloids.
The worst protective colloid is Dextrin which has the range of gold numbers $6 - 20$.
So from the above discussion we can conclude that as the gold number increases the protecting power of colloid decreases. Lesser the gold number more is its protection.

Note:
 Gold number is a term used in colloidal chemistry. Lesser the gold number, more protective the colloid. Gold number tells us that the low quantity of a particular substance with low gold number can prevent the colour change as discussed in the definition of gold number.