The atomc number of potassium is 19 & that of manganese is 25. Although the colour of MnO4- is dark violet yet the K+ is colourless.This is due to the fact that

(1) Mn is a transition element; while K+ is not

(2) [MnO4]- is negatively charged; while K+ has a positive charge.

(3) The effective atomic number of Mn in [MnO4]- is 26; while for K+ , the atomic number s 18

(4) The Mn in a high positive oxidation state allow charge transfer transitions.

Subtopic:  Chemistry of Mn and Cr Compounds |
 60%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Heating of Ag with dil. HNO3 give

1. NO

2. NO2

3. N2O

4. N2O3

Subtopic:  d-Block Elements- Properties & Uses |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Zinc dissolve in an excess of NaOH because of the formation of:

1. ZnO

2. Zn(OH)2

3. NaZn(OH)3

4. Na2ZnO2

Subtopic:  d-Block Elements- Properties & Uses |
 57%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

When excess of SnCl2 is added to HgCl2, the substance formed is

1. Hg2Cl2

2. Sn

3. Hg

4. Cl2

Subtopic:  d-Block Elements- Properties & Uses |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

The oxidation number is changed in which of the following case

1. SO2 gas is passed into Cr2O72-/H+

2. Aqueous solution of CrO42- is acidified

3. CrO2Cl2 is dissolved in NaOH

4. Cr2O72- solution is made alkaline

Subtopic:  Chemistry of Mn and Cr Compounds |
 56%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Which of the following elements form stable dinuclear ions

1. Zn

2. Cd

3. Hg

4. Fe

Subtopic:  d-Block Elements- Properties & Uses |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

The correct electronic configuration of Ti(Z=22 atom) is

(1) 1s22s22p63s23p63d2

(2) 1s22s22p63s23p63d24p6

(3) 1s22s22p63s23p63d4

(4) 1s22s22p63s23p64s23d2

Subtopic:  d-Block Elements- Properties & Uses |
 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The correct statement regarding colour of Zn2+, Ni2+and Cr3+among the following is:

1. Only Zn2+ is Colourless and  Ni2+and Cr3+ are coloured
2. All these are colourless
3. All these are coloured
4. Only Ni2+ is coloured and Zn2+ and Cr3+ are colourless.
Subtopic:  d-Block Elements- Properties & Uses |
 85%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The incorrect statement regarding the transition metals is:

1. They are malleable and ductile.
2. They have high melting and boiling points.
3. They crystallise with body-centered cubic and hexagonal close-packed structure only.
4. They show variable oxidation states although not always. 
Subtopic:  d-Block Elements- Properties & Uses |
 67%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

Assertion: Transition metals have high boiling points and high enthalpy of atomization.

Reason: The transition metals occur in bcc, hcp or ccp structures charcterstics of metals.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  d-Block Elements- Properties & Uses |
 63%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch