Q18 of 35 Page 1

(i) Which vitamin deficiency causes rickets?

(ii) Name the base that is found in nucleotide of RNA only.


(iii) Glucose on reaction with acetic acid gives glucose penta acetate. What does it suggest about the structure of glucose?

(i) vitamin D deficiency causes rickets.


(ii) Uracil is the base that is found in nucleotide of RNA only. The structure of nucleotide of RNA is given below:



(ii) Glucose on reaction with acetic acid gives glucose pentacetate.


⇒ This confirms that glucose contains five –OH groups.


⇒ We know that the presence of two or more OH group on the same carbon atom makes the molecule unstable.


⇒ Now since the glucose is a stable compound, therefore the five –OH groups must be present on the different carbon atoms.


More from this chapter

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16

Name the promoter used in the Haber’s process for the manufacture of ammonia.

 17

An organic aromatic compound ‘A’ with the molecular formula C6H7N is sparingly soluble in water. ‘A’ on treatment with dil HCI gives a water soluble compound ‘B’. ‘A’ also reacts with chloroform in presence of alcoholic KOH to form an obnoxious smelling compound ‘C’. ‘A’ reacts with benzene sulphonyl chloride to form an alkali soluble compound ‘D’.’A’ reacts with NaNO2 and HCl to form a compound ‘E’ which on reaction with phenol forms an orange red dye ‘F’. Elucidate the structures of the organic compounds from ‘A’ to ‘F’.

 19

Name the type of reaction involved in the formation of the following polymers from their respective monomers

(i) PVC.


(ii) Nylon6.


(iii) PHBV.

 20

Describe the role of

(i) NaCN in the extraction of gold from its ore.


(ii) Cryolite in the extraction of aluminium from pure alumina.


(iii) CO in the purification of Nickel