Consider the following statements. ...

Consider the following statements.
I. Sodium dichromate is less soluble than potassium dichromate.
II. Crystals of potassium dichromate are of orange colour.
III. The chromates and dichromates are interconvertible in aqueous solution depending upon pH of the soultion.
IV. The oxidation states of chromate and dichromate are different.
The correct statements are

I, II, III and IV

II and IV

I and III

I and II

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The correct Answer is:

Consider the following statements. I. Sodium dichromate is more soluble than potassium dichromate. II. Crystals of potassium dichromate are of orange colour. III. The chromates and dichromates are interconvertible in aqueous solution depending upon pH of the solution.

Only II

II and III

I and III

All of these

By the action of concentrated sulphuric acid

By roasting with soda ash

By the action of sodium hydroxid

By the action of limestone

Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).

Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).

Assertion (A) is correct, but Reason (R) is incorrect statement.

Assertion (A) is incorrect, but Reason (R) is correct statement.