Multiple choice

Which is incorrect about primary standard?

  1. They are hygroscopic and deliquescent

  2. They are stable in air.

  3. They exist in highly pure state.

  4. They readily dissolve in water.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct as we know that primary standards are neither hygroscopic nor deliquescent. This can be explained as follows: these are the reagents whose weight is true representative of the number of moles of the substance contained so if they would have been hygroscopic or deliquescent then they will undergo some change in their properties and will not represent the true no. of moles of the substance contained and hence these substances cannot be deliquescent of hygroscopic. Hence, this option is correct.

Keep practicing — related questions