Question

naoh absorbs moisture from air very readily. hence, it can never be used as a
a primary standard
b secondary standard
c analyte
d titrant
continue
question 2 of 6

Explanation:

A primary standard must be highly pure, stable (not absorb moisture or react with air easily), and have a known formula. Since NaOH absorbs moisture readily, it fails the stability requirement for a primary standard. A secondary standard is standardized against a primary standard. An analyte is the substance being analyzed. A titrant is the solution of known concentration used in titration. NaOH can be used as a secondary standard, analyte, or titrant after proper standardization, but due to its moisture - absorbing property, it can't be a primary standard.

Answer:

A. primary standard