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A solution of [Ni(H2O)6]2+ is green but a solution of [Ni(CN)4]2− is colourless. Explain.
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[Fe(CN)6]4− and [Fe(H2O)6]2+ are of different colours in dilute solutions. Why?
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What will be the correct order for the wavelengths of absorption in the visible region for the following?
[Ni(NO2)6]4−, [Ni(NH3)6]2+, [Ni(H2O)6]2+
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Define the following as related to proteins:
Peptide linkage
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What are the common types of secondary structure of proteins?
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What type of bonding helps in stabilising the α-helix structure of proteins?
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Differentiate between the following:
Fibrous proteins and Globular proteins
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Show how the following compound can be converted to benzoic acid.
Ethylbenzene
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Show how the following compound can be converted to benzoic acid.
Acetophenone
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Show how the following compound can be converted to benzoic acid.
Bromobenzene
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Show how the following compound can be converted to benzoic acid.
Phenylethene (Styrene)
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Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagent.
Tollens’ reagent
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An organic compound (A) (molecular formula C8H16O2) was hydrolysed with dilute sulphuric acid to give a carboxylic acid (B) and an alcohol (C). Oxidation of (C) with chromic acid produced (B). (C) on dehydration gives but-1-ene. Write equations for the reactions involved.
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How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.
Methyl benzoate
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How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.
m-Nitrobenzoic acid
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How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.
p-Nitrobenzoic acid
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How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.
Phenylacetic acid
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How will you bring about the following conversion in not more than two steps?
Benazaldehyde to α-Hydroxyphenylacetic acid
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Complete the synthesis by giving missing starting material, reagent or product.
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Give the uses of freon 12.
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