Q7 of 37 Page 1

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Name the unit formed by the attachment of a base to 1’ position of sugar in a nucleoside.


A nucleoside is one of the structural components or building blocks of DNA or RNA. A nucleotide consists of a base (one of the four bases: adenine, thymine, guanine, and cytosine) and a molecule of sugar and phosphoric acid. They are formed by the attachment of a base to 1’ position of sugar in a nucleoside.


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5

Read the given passage and answer the question

A Lead storage battery is the most important type of secondary cell having a lead anode and a grid of lead packed with PbO2 as cathode. A 38% solution of sulphuric acid is used as electrolyte. (Density=1.294 g mL-1) The battery holds 3.5 L of the acid. During the discharge of the battery, the density of H2SO4 falls to 1.139 g mL-1. (20% H2SO4 by mass)


Write the products of electrolysis when dilute sulphuric acid is electrolysed using Platinum electrodes.


 6

Question is one word answer

Name the substance used as depressant in the separation of two sulphide ores in Froth floatation method.


 8

Question is one word answer

Name the species formed when an aqueous solution of amino acid is dissolved in water?


 9

Question is one word answer

What type of reaction occurs in the formation of Nylon 6,6 polymer?