Question

Exactly required concentration can be prepared from chemical reagent is called.
Ans_primary standard secondary standard or both​

Answer 1

Primary standard is required concentration can be prepared from a chemical reagent.

Answer 2

Exactly required concentration can be prepared from chemical reagent is called Primary standard.

Standard solution:

• A solution which contains precisely known amount or concentration of a substance or an element. A specific amount of solute is added to make a specific quantity of volume.
• Such type of solution is made using standard substances. These solutions are also used to determine the concentrations of another substances for example solution in titrations.

Primary Standard Solution:

It is a reagent or chemical with some properties such as being extremely pure, highly stable, anhydrous, less hygroscopic, etc.

Therefore, exactly required concentration can be prepared from chemical reagent is called Primary standard.