MCQ
Which is polysaccharide
- AStarch
- BCellulose
- CGlycogen
- ✓All of these
Poysaccharides are carbohydrate polymers (e.g. starch, cellulose, or glycogen) which are made up of more than $10$ sub-units of monosaccharide molecules join together.Starch, glycogen and cellulose are polysaccharides of glucose. Maltose, sucrose and lactose are disaccharides, while, fructose and galactose are monosaccharides.
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The order of decreasing reactivities of these alcohols towards nucleophilic substitution with $HBr$ is
$(I)$ cis $- [Co(NH_3)_2(en)_2]^{3+}$ $(II)$ trans $-[IrCl_2(C_2O_4)_2]^{3-}$
$(III)\, [Rh(en)_3]^{3+}$ $(IV)$ cis $-[Ir(H_2O)_3Cl_3$