Question { Neuland, 49939 }

What is the difference between Primay and Secondry
Standard ?

Answer

primary standard:
which material u can use to prepare a standard
solution that is primary standard.

secondry standard:
u did't know the correct strength of the standard
solution. so u can use some material to standardizing the
standard solution. That material was secondry standard.

Question { 11151 }

In Karl fischer titrator what medium we can choose to
analysing aldehyde and ketone samples by using KF reagent

Answer

1:DIMETHYL FORMAMIDE

2:PYRIDINE

(NOTE:USING METHANOL MEDIUM ITS FORMS WATER MOLUCULE TO
YHIS SAMPLES BECAUSE THIS SAMPLES ARE KRTO GROUPS.)