The correct electronic configuration of Gadolinium(Atomic number = 64)  is :

1. [Xe]4f86d2                   

2. [Xe]4f95s1

3. [Xe]4f75d16s2                   

4. [Xe]4f65d26s2

Subtopic:  f-Block Elements- Properties & Uses |
 86%
From NCERT
NEET - 2015
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

Assuming complete ionisation, same moles of which of the following compounds will

require the least amount of acidified KMnO4 for complete oxidation?

1. FeSO4

2. FeSO3

3. FeC2O4

4. Fe(NO2)2

Subtopic:  d-Block Elements- Properties & Uses |
NEET - 2015
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 reason for lanthanoid contraction is:

1. Negligible screening effect of 'f' orbitals

2. Increasing nuclear charge

3. Decreasing nuclear charge

4. Decreasing screening effect

Subtopic:  Lanthanoid & Actinoids Contraction |
 74%
From NCERT
NEET - 2014
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A diamagnetic lanthanoid ion among the following is :

(At. numbers:  Ce = 58, Sm = 62, Eu = 63, Yb = 70)

1. Ce2+

2. Eu2+

3. Sm2+

4. Yb2+

Subtopic:  d-Block Elements- Properties & Uses |
 53%
From NCERT
NEET - 2013
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

Among the following, the incorrect statement regarding interstitial compounds is:

1. They retain metallic conductivity.

2. They are chemically reactive.

3. They are much harder than the pure metal.

4. They have higher melting points than the pure metal.

Subtopic:  d-Block Elements- Properties & Uses |
 77%
From NCERT
NEET - 2013
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

Identify the mixture of metals that contain a non-metal as a constituent in it.

1. lnvar

2. Steel

3. Bell metal

4. Bronze

Subtopic:  d-Block Elements- Properties & Uses |
 52%
From NCERT
NEET - 2012
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 statements is not true?

1. On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed

2. Na2Cr2O7 is preferred over K2Cr2O7 in volumteric analysis

3. K2Cr2O7 solution in acidic medium is orange

4. K2Cr2O7 solution becomes yellow on increasing the pH beyond 7

Subtopic:  Chemistry of Mn and Cr Compounds |
 56%
NEET - 2012
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

A pair among the following that have the same size is:

1. Fe2+, Ni2+

2. Zr4+, Ti4+

3. Zr4+ , Hf4+

4. Zn2+, Hf4+

Subtopic:  Lanthanoid & Actinoids Contraction |
 80%
From NCERT
NEET - 2010
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following species is colourless?

1. TiF62- and CoF63- 

2. Cu2Cl and NiCl42-

3. TiF62- and Cu2Cl

4. CoF63- and NiCl42- 

Subtopic:  d-Block Elements- Properties & Uses |
 72%
From NCERT
NEET - 2009
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

identify the incorrect statement among the following:

(1) There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu.

(2) Lanthanoid contraction is the accumulation of successive shrinkages

(3) As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements

(4) Shielding power of 4f electrons is quite weak

Subtopic:  d-Block Elements- Properties & Uses |
 80%
NEET - 2007
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