3. The endpoint of a titration involving the reaction of MnO4- to Mn2+ can be detected by the ... *

A) useofa pH probe.
B) use of redor blue litmus.
C)pink colour of the Mn+2.
D)addition of an indicator like methyl orange.

The solution of manganese ion, Mn2+ is colorless. This way, the reaction involves a colour change from pink to transparent.

There is no option with this information.

So, the best answer is (A)

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.