JEE Main 2021 (Online) 17th March Morning Shift | d and f Block Elements Question 46 | Chemistry

JEE Main 2021 (Online) 17th March Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement I : Potassium permanganate on heating at 573K forms potassium manganate.

Statement II : Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature.

In the light of the above statements, choose the most appropriate answer from the options given below :

Statement I is true but statement II is false

Statement I is false but statement II is true

Both statement I and statement II are false

Both statement I and statement II are true

JEE Main 2021 (Online) 16th March Morning Shift

MCQ (Single Correct Answer)

-1

Which of the following is Lindlar catalyst?

Partially deactivated palladised charcoal

Zinc chloride and HCl

Sodium and Liquid NH₃

Cold dilute solution of KMnO₄

JEE Main 2021 (Online) 26th February Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : In TlI₃, isomorphous to CsI₃, the metal is present in +1 oxidation state.

Reason R : Tl metal has fourteen f electrons in its electronic configuration.

In the light of the above statements, choose the most appropriate answer from the options given below :

A is correct but R is not correct

A is not correct but R is correct

Both A and R are correct but R is NOT the correct explanation of A

Both A and R are correct and R is the correct explanation of A

JEE Main 2021 (Online) 26th February Morning Shift

MCQ (Single Correct Answer)

-1

Which one of the following lanthanoids does not form MO₂? [M is lanthanoid metal]