(B) $K_2Cr_2O_7$ is a primary standard and is preferred over $Na_2Cr_2O_7$ in volumetric analysis because $Na_2Cr_2O_7$ is deliquescent (absorbs moist

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

$Na_2Cr_2O_7$ is more useful than $K_2Cr_2O_7$ in volumetric analysis.

(B) $K_2Cr_2O_7$ is a primary standard and is preferred over $Na_2Cr_2O_7$ in volumetric analysis because $Na_2Cr_2O_7$ is deliquescent (absorbs moisture from the air),making it difficult to weigh accurately. Therefore,the statement that $Na_2Cr_2O_7$ is more useful than $K_2Cr_2O_7$ is incorrect.

Class 12 Chemistry d-and f-Block Elements Compounds of Transitional elements

Easy

Which of the following statements is incorrect?

A
Passing $H_2S$ through an acidic solution of $K_2Cr_2O_7$ results in a milky solution.
B
$Na_2Cr_2O_7$ is more useful than $K_2Cr_2O_7$ in volumetric analysis.
C
In an acidic medium,$K_2Cr_2O_7$ is orange in color.
D
$K_2Cr_2O_7$ turns yellow if its $pH$ is increased to $7$.