Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 11

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Glucose on treatment with excess of phenyl hydrazine gives

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Important Questions on Biomolecules

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Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 12

When glucose is reduced with sodium amalgam in aqueous solution, it gives

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Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 13

The open-chain structure of

D (+)

glucose could not explain the

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Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 14

Mutarotation is the change of specific rotation of aqueous solution of:

$(a)$ $β$ - glucose from $+ 19.2 °$ to $+ 52.5 °$ .

$(b)$ $α$ - glucose from $+ 111 °$ to $+ 52 . 5^{°}$ .

$(c)$ a sucrose from dextrorotatory to laevorotatory.

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Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 15

Glucose + 5 ({CH}_{3} CO)_{2} O \to X + 5

molecules of acetic acid. The increase in molecular mass of glucose on forming

' X'

in the above reaction is

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Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 16

${CH}_{2} OH (CHOH)_{4} CHO + HCN \to X$

Identify the compound $X$ in the above reaction?

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Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 17

Number of enantiomeric pairs of cyclic form of fructose is

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Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 18

Presence of glucose cannot be tested by

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Chemistry Crash Course JEE Main>Chapter 4 - Biomolecules>Level 2>Q 19

The fructose molecule in sucrose exists as