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d- and f-Block Elements · Question 3

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1

Match List I with List II :

  1. A-III, B-IV, C-I, D-II
  2. A-III, B-I, C-IV, D-II
  3. A-II, B-I, C-IV, D-III
  4. A-IV, B-I, C-III, D-II

Answer

(2) A-III, B-I, C-IV, D-II

Solution

As per NCERT (catalytic properties of transition metals):

A. V2O5 ⇒ Contact process: 2SO2 + O2 2SO3, used for H2SO4 ⇒ III

B. Fe (finely divided) ⇒ Haber process: N2 + 3H2 2NH3 ⇒ I

C. PdCl2 ⇒ Wacker process: oxidation of ethyne to ethanal ⇒ IV

D. Nickel complexes ⇒ polymerisation of alkynes (and other organic compounds such as benzene) ⇒ II

∴ A-III, B-I, C-IV, D-II

Answer: (2)

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Keep practising — d- and f-Block Elements

2

The lanthanide ion having four unpaired electrons is (Given : Atomic numbers of Ce = 58, Nd = 60, Tb = 65 and Ho = 67)

  1. Ho3+
  2. Nd3+
  3. Ce3+
  4. Tb3+
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3

The green paramagnetic species formed by heating KMnO4 at 513 K is

  1. KO2
  2. K2MnO4
  3. Mn3O4
  4. MnO
RE-NEET (UG) 2026
4

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. In light of the above statements, choose the most appropriate answer from the options given below:

  1. A is not correct but R is correct
  2. Both A and R are correct and R is the correct explanation of A
  3. Both A and R are correct and R is NOT the correct explanation of A
  4. A is correct but R is not correct.
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5

Match List - I with List - II. Choose the correct answer from the options given below :

  1. A-I, B-II, C-III, D-IV
  2. A-I, B-IV, C-III, D-II
  3. A-I, B-II, C-IV, D-III
  4. A-II, B-III, C-I, D-IV
NEET (UG) 2025
6

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Statement I is true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false
NEET (UG) 2025
7

'Spin only' magnetic moment is same for which of the following ions? Choose the most appropriate answer from the options given below.

  1. B and D only
  2. A and E only
  3. B and C only
  4. A and D only
NEET (UG) 2024
8

The E value for the Mn3+/Mn2+ couple is more positive than that of Cr3+/Cr2+ or Fe3+/Fe2+ due to change of

  1. d5 to d4 configuration
  2. d5 to d2 configuration
  3. d4 to d5 configuration
  4. d3 to d5 configuration
NEET (UG) 2024
9

The pair of lanthanoid ions which are diamagnetic is

  1. Ce4+ and Yb2+
  2. Ce3+ and Eu2+
  3. Gd3+ and Eu3+
  4. Pm3+ and Sm3+
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10

Which of the following pairs of ions will have same spin only magnetic moment values within the pair? Choose the correct answer from the options given below :

  1. C and D only
  2. A and D only
  3. A and B only
  4. B and C only
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11

Which of the following set of ions act as oxidising agents?

  1. Ce4+ and Tb4+
  2. La3+ and Lu3+
  3. Eu2+ and Yb2+
  4. Eu2+ and Tb4+
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