K2Cr2O7 Potassium dichromate

Assertion (A): Potassium dichromate is preferred to Na_(2)Cr_(2)O_(7) for use in volumetric analysis (titrations) Reason (R): Na_(2)Cr_(2)O_(7) is hygroscopic whilst the K_(2)Cr_(2)O_(7) is not Which of the following is correct ?

Which of the following statement (s) is /are correct? (I) In acidic solution dichromate ions are converted to chromate ions . (II) An acidified solution of K_(2)Cr_(2)O_(7) liberates iodine from iodides. (III) Potassium dichromate is used as a titrant for Fe^(2+) ions. (IV) Ammonium dichromate on heating undergo exothermic decomposition to give Cr_(2)O_(3) . Choose the correct option .

In acidic medium potassium dichromate acts as on oxidant according to the equation, Cr_(2) O + 14 H^(+) + 6e^(-)rarr 2Cr^(3+) + 7H_(2)O . What is the equivalent weight of K_(2) Cr_(2) O_(7) ? (mol. Wt. = M)

Which of the following reactions do not result in the preparation of potassium dichromate? (I) 4FeCr_2O_4+8 Na_2CO_3+7O_2to (II) Na_2CrO_4+H_2SO_4 to (III) Na_2Cr_2 O_7 + 2KCl to