Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 45

MEDIUM

NEET

IMPORTANT

Earn 100

When ${KMnO}_{4}$ reacts with ${Br}_{2}$ in weak alkaline medium gives bromate ion. Then oxidation state of $Mn$ changes from $+ 7$ to:

50% studentsanswered this correctly

Important Questions on The d- and f-Block Elements

HARD

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 46

Which of the statements is not true?

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 47

Which one of the following does not correctly represent the correct order of the property indicated against it?

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 48

The catalytic activity of transition metals and their compounds is ascribed mainly to :

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-I (Conceptual Questions)>Q 49

Magnetic moment of

{Cr}^{2 +}

is nearest to :

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-II (Previous Year Questions)>Q 1

Which of the following element has lowest melting point :

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-II (Previous Year Questions)>Q 2

Maximum no. of unpaired electrons are present in :

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-II (Previous Year Questions)>Q 3

K_{2} {Cr}_{2} O_{7}

in acidic medium converts into :

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>EXERCISE-II (Previous Year Questions)>Q 4

Which of the following metal ion forms unstable complex with

CN

: