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HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

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What are the high-spin complexes?

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Answer in brief.

[CoCl4]2− is a tetrahedral complex. Draw its box orbital diagram. State which orbitals participate in hybridization.

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Answer in brief.

[CoCl4]2- is a tetrahedral complex. Draw its box orbital diagram. State which orbitals participate in hybridization.

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Answer in brief.

What are strong field and weak field ligands ? Give one example of each.

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Answer in brief.

With the help of the crystal field, the energy-level diagram explains why the complex [Cr(en)3]3⊕ is coloured.

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Answer the following question.

Give valence bond description for the bonding in the complex [VCl4]-. Draw box diagrams for the free metal ion. Which hybrid orbitals are used by the metal? State the number of unpaired electrons.

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Answer the following question.

Draw a qualitatively energy-level diagram showing d-orbital splitting in the octahedral environment. Predict the number of unpaired electrons in the complex [Fe(CN)6]4-. Is the complex diamagnetic or paramagnetic? Is it coloured? Explain.

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Answer in brief.

Formic acid is stronger than acetic acid. Explain.

[12] Aldehydes, Ketones and Carboxylic Acids
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
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Arrange the following carboxylic acids with increasing order of their acidic strength and justify your answer.

1) 

2)

3)

[12] Aldehydes, Ketones and Carboxylic Acids
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
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Answer the following

Write a reaction to convert Aniline into p-bromoaniline.

[13] Amines
Chapter: [13] Amines
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Answer the following

Complete the following reaction :

\[\ce{C6H5NH2 + Br2_{(aq)} -> ?}\]

[13] Amines
Chapter: [13] Amines
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Answer the following.

Write a reaction to bring about the following conversions: Aniline into p-nitroaniline

[13] Amines
Chapter: [13] Amines
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Answer the following.

Write a reaction to bring about the following conversions: Aniline into sulphanilic acid?

[13] Amines
Chapter: [13] Amines
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Answer the following

How nanotechnology plays an important role in water purification techniques?

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
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Which flower is an example of self-cleaning?

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
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Explain, why [Co(NH3)6]3+ ion is low spin? Calculate number of unpaired electrons and write the geometry of [Co(NH3)6]3+.

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Answer the following with respect to [CoF6]3– ion

  1. Type of hybridization
  2. Number of unpaired electrons
  3. Geometry of complex ion
  4. Magnetic property
[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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Freezing point depression constant of a solvent is _______.

[2] Solutions
Chapter: [2] Solutions
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What is a cryoscopic constant?

[2] Solutions
Chapter: [2] Solutions
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Write the effect of dissolution of a nonvolatile solute on the freezing point of solvent.

[2] Solutions
Chapter: [2] Solutions
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