Identify the incorrect statements regarding primary standard of titrimetric analysis (A) It should be purely available in dry form. (B) It should not undergo chemical change in air. (C) It should be h

Question

Identify the incorrect statements regarding primary standard of titrimetric analysis (A) It should be purely available in dry form. (B) It should not undergo chemical change in air. (C) It should be hygroscopic and should react with another chemical instantaneously and stoichiometrically. (D) It should be readily soluble in water. (E) KMnO4 & NaOH can be used as primary standard. Choose the correct answer from the options given below :

(A) (C) and (D) only
(B) (B) and (E) only
(C) (A) and (B) only
(D) (C) and (E) only

Prashant Kotian · Accepted Answer

Correct answer: D. KMnO4 & NaOH  Secondary standard. Primary standard should not be Hygroscopic.

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