Class 12 Exam > Class 12 Questions > Statement1 : [Ni (H2O)6]2+ is green but a sol...
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Statement–1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.
Statement–2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV region
Statement–2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV region
- a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.
- b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.
- c)Statement- 1 is True, Statement- 2 is False.
- d)Statement- 1 is False, Statement- 2 is True
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is c...
Cyanide is stronger ligand than water. It causes much higher crystal field splitting. Energy difference between d levels (i.e.)for [Ni(H2O)6]2+ complex (paramagnetic) is in the visible region and that for the [Ni(CN4)]2 complex (diamagnetic) is in the UV region.
Hence, [Ni(H2O)6]2+ forms green color solution whereas [Ni(CN4)]2 forms colorless solution.
Hence, [Ni(H2O)6]2+ forms green color solution whereas [Ni(CN4)]2 forms colorless solution.
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Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is c...
Statement 1: [Ni(H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colorless.
Statement 2: Energy difference between d levels for [Ni(H2O)6]2+ complex (paramagnetic) is in the visible region and that for [Ni(CN)4]2- complex (diamagnetic) is in the UV region.
Explanation:
1. Color of [Ni(H2O)6]2+ complex:
- The color of transition metal complexes arises from the absorption of certain wavelengths of light due to the electronic transitions between the d orbitals.
- In [Ni(H2O)6]2+ complex, nickel is in the +2 oxidation state and has a d8 electronic configuration (3d8).
- The presence of six water ligands (H2O) in the coordination sphere causes splitting of the d orbitals into two sets of three orbitals each, known as the t2g (lower energy) and eg (higher energy) sets.
- The energy difference between these sets falls in the visible region, resulting in the absorption of certain wavelengths of light, primarily in the blue-green region.
- As a result, the complex appears green in color.
2. Color of [Ni(CN)4]2- complex:
- In [Ni(CN)4]2- complex, nickel is in the +2 oxidation state and has a d8 electronic configuration (3d8).
- The presence of four cyanide ligands (CN-) in the coordination sphere causes a different splitting of the d orbitals compared to the water ligands.
- The energy difference between the t2g and eg sets in this complex falls in the UV region, meaning it absorbs light of shorter wavelengths, which are not visible to the human eye.
- As a result, the complex appears colorless, as it does not absorb any significant amount of visible light.
Explanation of the given options:
a) Statement 1 is True, Statement 2 is True; Statement 2 is a correct explanation for Statement 1.
- This option is correct because it accurately states that the [Ni(H2O)6]2+ complex is green due to the absorption of visible light, while the [Ni(CN)4]2- complex is colorless due to the absorption of UV light.
b) Statement 1 is True, Statement 2 is True; Statement 2 is NOT a correct explanation for Statement 1.
- This option is incorrect because Statement 2 provides a correct explanation for the color difference between the two complexes.
c) Statement 1 is True, Statement 2 is False.
- This option is incorrect because both statements are true.
d) Statement 1 is False, Statement 2 is True.
- This option is incorrect because Statement 1 is true.
Statement 2: Energy difference between d levels for [Ni(H2O)6]2+ complex (paramagnetic) is in the visible region and that for [Ni(CN)4]2- complex (diamagnetic) is in the UV region.
Explanation:
1. Color of [Ni(H2O)6]2+ complex:
- The color of transition metal complexes arises from the absorption of certain wavelengths of light due to the electronic transitions between the d orbitals.
- In [Ni(H2O)6]2+ complex, nickel is in the +2 oxidation state and has a d8 electronic configuration (3d8).
- The presence of six water ligands (H2O) in the coordination sphere causes splitting of the d orbitals into two sets of three orbitals each, known as the t2g (lower energy) and eg (higher energy) sets.
- The energy difference between these sets falls in the visible region, resulting in the absorption of certain wavelengths of light, primarily in the blue-green region.
- As a result, the complex appears green in color.
2. Color of [Ni(CN)4]2- complex:
- In [Ni(CN)4]2- complex, nickel is in the +2 oxidation state and has a d8 electronic configuration (3d8).
- The presence of four cyanide ligands (CN-) in the coordination sphere causes a different splitting of the d orbitals compared to the water ligands.
- The energy difference between the t2g and eg sets in this complex falls in the UV region, meaning it absorbs light of shorter wavelengths, which are not visible to the human eye.
- As a result, the complex appears colorless, as it does not absorb any significant amount of visible light.
Explanation of the given options:
a) Statement 1 is True, Statement 2 is True; Statement 2 is a correct explanation for Statement 1.
- This option is correct because it accurately states that the [Ni(H2O)6]2+ complex is green due to the absorption of visible light, while the [Ni(CN)4]2- complex is colorless due to the absorption of UV light.
b) Statement 1 is True, Statement 2 is True; Statement 2 is NOT a correct explanation for Statement 1.
- This option is incorrect because Statement 2 provides a correct explanation for the color difference between the two complexes.
c) Statement 1 is True, Statement 2 is False.
- This option is incorrect because both statements are true.
d) Statement 1 is False, Statement 2 is True.
- This option is incorrect because Statement 1 is true.
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Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer?
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Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer?.
Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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Here you can find the meaning of Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Statement1 : [Ni (H2O)6]2+ is green but a solution of [Ni(CN)4]2- is colourless.Statement2 : Energy difference between d levels (i.e. ) for H2 O complex (paramagnetic) is in the visible region and that for the cyano complex (diamagnetic) is in the UV regiona)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is TrueCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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