d and f-Block E...

Only One Option Correct Type

Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

Q.

Which is most basic oxide of chromium?

The basic character of the transition metal monoxides follows the order

(Atomic Number, Ti = 22, V = 23, Cr = 24, Fe = 26)

MnO₄^-  + S^2- + H⁺ → Mn²⁺ +S + H₂O When this equation is balanced, the total number of coefficients on the left hand side are

when this equation is balanced, the num ber of OF^- ions added

One mole of each KMnO₄ and K₂Cr₂O₇ can oxidise ........... moles of ferrous ion.

is of intense pink colour, though Mn is in (+7) oxidation state. It is due to

Which of the following is incorrect statement?

Pyrolusite in MnO₂ is used to prepare KMnO₄. Steps are

Here, I and II are

Which is the correct statem ent about  structure?

Out of Cr (VI) as  , which is better oxidising agent?

Matching List Type

Direction (Q. Nos. 11 and 12) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Q.

Match the Column I with Column II and mark the correct option from the codes given below.

Match the Column I with Column II and mark the correct option from the codes given below.

Statement Type

Direction (Q. Nos. 13 and 14) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

Q. 

Statement I ; When a solution of potassium chromate is treated with an excess of dilute nitric acid chromate undergoes oxidation.

Statement II : Dichromate ions are produced in above process.

Statement I : The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution has green colour.

Statement II : The product has Cr³⁺ ions.