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Q. No.
Assertion(A): Ni++ has two unpaired electrons. 
Reason(R): Electrons are removed from 3d but not from 4s.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.

 
Subtopic:  d-Block Elements- Properties & Uses |
 77%
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Given below are two statements: 

Assertion (A): Cr2+ acts as a reducing agent and Mn3+ acts as an oxidising agent when both have d4 configuration.
Reason (R): The maximum oxidation state Cr show is +5 and Mn shows is +7.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  d-Block Elements- Properties & Uses |
 58%
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Assertion (A): The highest oxidation state of osmium is +8 .
Reason (R): Osmium is a 5d-block element.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

Subtopic:  d-Block Elements- Properties & Uses |
 65%
From NCERT
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Given below are two statements: 

Assertion (A): Cu cannot liberate hydrogen from acids.
Reason (R): Because it has positive electrode potential.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is not true but (R) is true
4. Both (A) and (R) are false.

Subtopic:  d-Block Elements- Properties & Uses |
 88%
From NCERT
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Given below are two statements: 

Assertion (A): Separation of Zr and Hf is difficult.
Reason (R): Because Zr and Hf lie in the same group of the periodic table.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is not true but (R) is true
4. Both (A) and (R) are false.

Subtopic:  d-Block Elements- Properties & Uses |
 65%
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Assertion (A): \(Cu^{2+}\) iodide is not known.
Reason (R): \(Cu^{2+}\) oxidises  \(I^-\) to iodine.
 
1. Both (A) and (R) are True, and (R) is the correct explanation of the (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is not True but (R) is True.
4. Both (A) and (R) are False.
Subtopic:  d-Block Elements- Properties & Uses |
 72%
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Statement I: Cr2+ is a stronger reducing agent than Fe2+ .
Statement II: Fe2+ is a stronger reducing agent than Cr2+ .
 
1. Both Statements I and Statement II are true.
2. Statement I is true and Statement II is false.
3. Both Statements I and Statement II are false.
4. Statement I is false, Statement II is true.
Subtopic:  d-Block Elements- Properties & Uses |
 66%
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Statement 1: Highest oxidation state of a metal is exhibited in its oxide or fluoride only.
Statement 2: Both oxide and fluoride ions are able to oxidise metals.
 
1. Statement 1 is true, Statement 2 is false.
2. Statement 1 is false, Statement 2 is true.
3. Both Statements 1 and Statement 2 are true.
4. Both Statements 1 and Statement 2 are false.
Subtopic:  d-Block Elements- Properties & Uses |
 76%
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Statement 1: Silver atom has completely filled d orbitals (4d10) in its ground state.
Statement 2: Silver is not a transition element.
 
1. Statement 1 is true , Statement 2 is false.
2. Statement 1 is false, Statement 1 is true.
3. Both Statements 1 and Statement 2 are true.
4. Both Statements 1 and Statement 2 are false.
Subtopic:  d-Block Elements- Properties & Uses |
 66%
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Consider the following graph.

Based on the graph above, it can be concluded that the element with a melting point higher than 3000 K will be:

1. Y 2. X
3. Z 4. None of the above
Subtopic:  d-Block Elements- Properties & Uses |
 90%
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