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Which of the following is (are) primary standard?

Option: 1

Na_2C_2O_4


Option: 2

F_2Cr_2O_7


Option: 3

KIO_3


Option: 4

All of these


Answers (1)

As we learnt

 

Primary Standard -

 

Primary standard is a substance of known high purity which may be dissolved in a known volume of solvent to give a primary standard solution. It is a reference chemical used to measure an unknown concentration of another known chemical.

- wherein

NaC_2O_4 (Sodium\ Oxalate)\;; K_2Cr_2O_7 (Potassium\ Dichromate)\;; KIO_3(Potassium\ Iodate )\;;Oxalic\ acid

 

 All of the given chemicals are primary standard

 

Posted by

Sumit Saini

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