Class 12th

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A glycosidic linkage is a linkage that connects monosaccharides in polysaccharides. The covalent bond that joins two or more monosaccharides to produce a polysaccharide is known as this linkage.

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Ans:

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(a, d) Tranquilizers are neurologically active drugs. Veronal and luminal are derivatives of barbituric acid used as tranquilizers.

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The sugar moiety of a nucleoside is linked to a phosphoric acid unit, ideally at the 5? position, to form a nucleotide.

The structure is depicted in the diagram below.

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(a, d) Ranitidine and cimetidine are antihistamines which are used as ant-acids. These drug result in release of lesser amount of acid. Brompheniramine and terfenadine are antihistamines which act as antiallergic in drugs.

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Ans: The best reagents for the conversion of nitrile to primary amine are LiAlH4 and Sodium/Alcohol. By reduction, the nitriles can be converted into a corresponding primary amine.

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(b, d) Sodium Hydrogen carbonate and Magnism Hydroxide, both are mild alkalies, are used as ant-acids.

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Ans: When Benzyl amine is treated with nitrous acid, firstly BDC is formed which is unstable and decomposes to Benzyl alcohol. 

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n-hexane is produced when glucose is cooked with HI for a lengthy amount of time. The reaction is depicted in the diagram below.

n-hexane has six carbon atoms joined in a straight chain because glucose has six carbon atoms.

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(c, d) Penicillin destroys bacteria by destroying the cell wall of the microorganism or kill the bacteria so, it has bacteriocidal effect. Penicillin has a narrow or limited spectrum.