On addition of one `ml` solution `10% NaCl` to `10 ml` gold sol in the presence of `0.0250g` of starch , the coagulation is just prevented starch has the gold number `:`
A
`2.5`
B
25
C
`0.25`
D
250
Text Solution
Verified by Experts
The correct Answer is:
2
Gold no. `=` amount of protective colloid in mg to be added to `10ml` of gold sol to prevent its coagulation on add of `1 ml` of `10% NaCl` solution of Gold no. `=0.0250xx1000=25`
on addition of 1 ml solution of 10% NaCl to 10 ml gold sol in the presence of 0.25g of strach, the coagulation is just prevented. Strach has the following gold number
On addition of 1 mL solution of 10% NaCl to 10 Ml gold sol in the presence of 0.0250 g of starch, the coagulation is just prevented. What is the gold number of starch?
On addition of one ml solution of 10% NaCl to 10 ml gold solution in the presence of 0.009 g of an anticoagulant, the coagulation is prevented. What is the gold number of anticoagulant?
