Question

# On addition of one mL of $$10\%$$ $$NaCl$$ solution to $$10$$ mL gold sol in the presence of $$0.25$$ g of starch, the coagulation is just prevented. Starch has gold number:

A
0.025
B
0.25
C
2.5
D
none of these

Solution

## The correct option is D none of these$$0.25gm$$ of starch needed to prevent coagulation of $$10$$% $$NaCl$$ to $$10ml$$ gold.sol.Amount of starch $$=0.25gm=250mg$$.So, the gold number of starch is $$250$$.So, Option-D $$\Rightarrow$$ none of these.Chemistry

Suggest Corrections

0

Similar questions
View More

People also searched for
View More