An element that does not show variable oxidation state is:

1. Fe 2. Mn
3. Cu 4. Zn

Subtopic:  d-Block Elements- Properties & Uses |
 90%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The pairs having similar magnetic moments are:

1. Ti3+, V3+ 2. Cr3+, Mn2+
3. Mn2+, Fe3+ 4. Fe2+, Mn2+
Subtopic:  d-Block Elements- Properties & Uses |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A pair among the following that has both coloured ions in the aqueous solution is-
(At. no : Sc =21, Ti = 22, Ni = 28, Cu = 29, Co = 27)

1. Ni2+, Ti3+ 2. Sc3+, Ti3+
3. Sc3+, Co2+ 4. Ni2+, Cu+
Subtopic:  d-Block Elements- Properties & Uses |
 78%
From NCERT
NEET - 2006
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

 The increasing order of oxidising power among the following species is :

1. VO2+Cr2O72MnO4-                           

2. VO2MnO4Cr2O72-

3. Cr2O72VO2MnO4-,                           

4. Cr2O72MnO4VO2+

Subtopic:  d-Block Elements- Properties & Uses |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following ions has the most unpaired electrons?

1. Fe2+ 2. Fe3+
3. Co3+ 4. Co2+
Subtopic:  d-Block Elements- Properties & Uses |
 80%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

What is the correct electronic configuration of Ti (Z = 22 atoms)?

1. 1s22s22p63s23p63d2

2. 1s22s22p63s23p63d24p6

3. 1s22s22p63s23p63d4

4. 1s22s22p63s23p64s23d2

Subtopic:  d-Block Elements- Properties & Uses |
 88%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The unpaired electron in Eu3+ will bear similarities to that found in :

1. Yb2+ 2. Ho3+
3. Sm2+ 4. Gd3+
Subtopic:  f-Block Elements- Properties & Uses |
 58%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The values of X, Y, P, and Q are, respectively:
   

1. MnO3+, Mn2O7, conc. H2SO4, and K2MnO4

2. K2MnO4, conc. H2SO4, Mn2O7, and MnO3+

3. Na2CO3, MnO2, K2MnO4, and Mn2O7

4. H+, K2MnO4MnO3+, and Mn2O7

Subtopic:  d-Block Elements- Properties & Uses |
 73%
Please attempt this question first.
Hints

The element that has a maximum composition in Mischmetal and is used in the gas lighters is:

1. Ce 2. Fe
3. Sm 4. La
Subtopic:  d-Block Elements- Properties & Uses |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following statements is false? 

1. V2+ < Cr2+ < Mn2+ < Fe2+ : Paramagnetic behaviour
2. Ni2+ < Co2+ < Fe2+ < Mn2+ : Ionic size
3. Co3+ < Fe3+ < Cr3+ < Sc3+ : Stability in aqueous solution
4. Sc < Ti < Cr < Mn : Number of oxidation states

Subtopic:  d-Block Elements- Properties & Uses |
 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh