Question
- Write the structural difference between starch and cellulose.
- What type of linkage is present in Nucleic acids?
- Give one example each for fibrous protein and globular protein.
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Answer
- Starch - Polymer of$\alpha - \text{D} - $ glucose units/Polymer of $\alpha -\text{ glucose}$ units.
- Phosphodiester linkage.
- Fibrous protein–Keratin/myosin/collagen.
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An optically active compound having molecular formula C6H12O6 is found in two isomeric forms (A) and (B) in nature. When (A) and (B) are dissolved in water, they show the following equilibrium.
$(\text{A})\ \ \ \ \rightleftharpoons\ \ \ \ \text{Equilibrium mixture}\ \ \ \ \rightleftharpoons\ \ \ \ \text{(B)}\\ [\alpha]_{\text{D}}=111^\circ\ \ \ \ \ \ \ \ \ \ \ \ \ \ 52.2^\circ\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 19.2^\circ$
→$(\text{A})\ \ \ \ \rightleftharpoons\ \ \ \ \text{Equilibrium mixture}\ \ \ \ \rightleftharpoons\ \ \ \ \text{(B)}\\ [\alpha]_{\text{D}}=111^\circ\ \ \ \ \ \ \ \ \ \ \ \ \ \ 52.2^\circ\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 19.2^\circ$
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→$(i)$ Acetic acid reacts with chlorine in the presence of red phosphorus?
$(ii)$ Silver acetate reacts with bromine in the presence of inert solvent $\left( CCl _4\right)$ ?
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Given: $($Molar mass of sucrose $= 342\ g\ mol^{–1})$
$($Molar mass of glucose $= 180\ g\ mol^{–1})$
→Given: $($Molar mass of sucrose $= 342\ g\ mol^{–1})$
$($Molar mass of glucose $= 180\ g\ mol^{–1})$
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→$Fe(s) | Fe^{2+}(0.001M) || H^+ (1M) | H_2(g)(1\ bar) | Pt(s)$
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