C o n s i d e r t h e f o l l o w i n g r e a c t i o n s K 2 C r 2 O 7 → - H 2 O K O H A → - H 2 O H 2 S O 4 B + K 2 S O 4 T h e p r o d u c t s [ A ] a n d [ B ] , r e s p e c t i v e l y a r e :

K 2 C r O 4 a n d K 2 C r 2 O 7

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Cu 2 + in water is more stable than Cu + . Reason (R) : Enthalpy of hydration for Cu 2 + is much less than that of Cu + . In the light of the above statements, choose the correct answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A).

(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).

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The first ionization enthalpy of 3 d series elements is more than that of group 2 metals Reason (R): In 3 d series of elements successive filling of d -orbitals takes place. In the light of the above statements, choose the correct answer from the options given below:

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true but (R) is not the correct explanation of (A)

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 19 - The d- and f-Block Elements>Exercise 1>Q 166

EASY

JEE Main

IMPORTANT

Earn 100

Match List - I with List - II.

Choose the correct answer from the options given
below:

68.06% studentsanswered this correctly

Important Questions on The d- and f-Block Elements

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 19 - The d- and f-Block Elements>Exercise 1>Q 167

C o n s i d e r t h e f o l l o w i n g r e a c t i o n s K_{2} C r_{2} O_{7} \to_{- H_{2} O}^{K O H} |A| \to_{- H_{2} O}^{H_{2} S O_{4}} [B] + K_{2} S O_{4} T h e p r o d u c t s [A] a n d [B], r e s p e c t i v e l y a r e :

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 19 - The d- and f-Block Elements>Exercise 1>Q 168

Which of the following ions is the strongest oxidizing agent?
(Atomic Number of Ce=58, Eu=63, Tb=65, Lu=71]

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 19 - The d- and f-Block Elements>Exercise 1>Q 169

Preparation of potassium permanganate from MnO₂ involves two step process in which the 1st step is a reaction with KOH and KNO₃ to produce

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 19 - The d- and f-Block Elements>Exercise 1>Q 170

$F i n d t h e c o m p o u n d' A' f r o m t h e f o l l o w i n g r e a c t i o s e q u e n c e s .$

$A$ $\overset{a q u a - r e g i a}{\to}$ $B$ $\to_{(2) A c O H}^{(1) K N O_{2} [N H_{4} O H]}$ $y e l l o w p p t$

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 19 - The d- and f-Block Elements>Exercise 1>Q 171

$M a t c h L i s t - I w i t h L i s t - I I .$

$\begin{matrix} L i s t - I (T r a n s i t i o n m e t a l i o n) & L i s t - I I (T r a n s i t i o n m e t a l i o n) (S p i n o n l y m a g n e t i c m o m e n t (B . M .)) \\ (A) T i^{3 +} & (I) 3.87 \\ (B) V^{2 +} & (I I) 0.00 \\ (C) N i^{2 +} & (I I I) 1.73 \\ (D) S c^{3 +} & (I V) 2.84 \end{matrix} C h o o s e t h e c o r r e c t a n s w e r f r o m t h e o p t i o n s g i v e n b e l o w :$

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 19 - The d- and f-Block Elements>Exercise 1>Q 172

The correct option with order of melting points of the pairs

(Mn, Fe),

(Tc, Ru)

and

(Re, Os)

is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 19 - The d- and f-Block Elements>Exercise 1>Q 173

The spin only magnetic moment ($\mu$) value (B.M.) of the compound with strongest oxidising power among $\text{Mn}_2\text{O}_3$, TiO and VO is _____ B.M. (Nearest integer).