Question

Which one of the following modification in limit test for chloride on KMNO4 is required

a.

Pretreatment with sodium hydroxide

b.

Pretreatment with hydrogen peroxide

c.

Pretreatment with ethanol

d.

Pretreatment with hydrochloric acid​

Answer 1

Answer:

nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata nahi pata

Answer 2

(d) Pretreatment with hydrochloric acid is done in the modified limit test for chloride on $KMnO_{4}$.

• Limit tests in chemistry are done for the studying and analysing other compounds.
• In the earlier times, the limit test was done with the help of sodium chloride (NaCl) which was dissolved in distilled water to make a solution.

• Nowadays, it is done with the help of dilute hydrochloric acid (HCl) which is substituted with sodium chloride.
• The intensity of the turbidity is affected based on how much chloride is present in the test substance.