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Hydrocarbons

Short Answer Type

61.

Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.

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62.

Classify the following groups as activating or deactivating with respect to further electrophilic substitution of aromatic ring:
(a) – Cl (b) -CN
(c) – NH₂ (d) –SO₃H
(e) –NO₂ (f) – CH₃.

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63.

Define Wurtz Reaction?

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64.

What is lindane?

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65.

Last traces of water can be removed from benzene by using sodium metal. Why?

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66.

What is paraffinic petroleum and asphaltic petroleum?

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67.
What is solvent naphtha? What is its true?

During coal-tar distillation, various fractions can be taken. The fraction distilling between 413-433 K is called solvent naphtha. It mainly contains xylenes and cumene and is used as a solvent for resins, rubbers, paints, etc.

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