MCQ
Raffinose is
  • Trisaccharide
  • B
    Monosaccharide
  • C
    Disaccharide
  • D
    None of these

Answer

Correct option: A.
Trisaccharide
a
(a)Raffinose $({C_{18}}{H_{32}}{O_{16}})$ is a trisaccharide

${C_{18}}{H_{32}}{O_{16}} + {H_2}O \to \mathop {{C_6}{H_{12}}{O_6}}\limits_{{\rm{D\, glucose}}} + \mathop {{C_6}{H_{12}}{O_6}}\limits_{{\rm{D \,fructose}}} + \mathop {{C_6}{H_{12}}{O_6}}\limits_{{\rm{D\,mannose}}} $

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$2H_2 + 2NO \to N_2 + 2H_2O$

the following mechanism has been proposed

$(i)$  $2NO \rightleftharpoons N_2O_2\,$   (fast)

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Given below are two statements : one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.

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Reason $(R)$ : The - $NH _{2}$ group of aniline becomes deactivating because of salt formation with anhydrous $AlCl _{3}$ and hence yields $m$-methyl aniline as the product.

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