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A zwitter ion is...

A zwitter ion is ______

A

a positively charged ion without a metal atom in it

B

a negatively charged ion without metal atom in it

C

a doubly charged ion

D

a heavy ion with a small charge on it

Text Solution

Verified by Experts

The correct Answer is:
C
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Read the given passage ans answer question number 1 to 5 that follow : Amino acids are classified as acidic, baisc or neutral depending unpon the relative number of makes it neutral , more number of amino than carboxyl groups makes it basic and more carboxyl groups are compared to amino groups makes it acidic . The amino acids , which can be synthesised in the body and must be obtained through diet , are known as essential amino acids. Amino acids are usually colourless, crystalline solids . These are water -solute , high melting solids and behave like salts rather than simple amines or carboxylic acids . This behaviour is due to the presence of both acidic (carboxyl group) and basic (amino group) in the same mlecule . In aqueous solution , the carboxyl group can lose a proton and amino group can accept a proton , giving rise to a dipolar ion known as zwitter ion. This is neutral but contains both positive and negative charges. In zwitter ionic , form amino acids show amphoteric behaviour as they react both with acids and bases. What is zwitter ion?

Read the given passage ans answer question number 1 to 5 that follow : Amino acids are classified as acidic, baisc or neutral depending unpon the relative number of makes it neutral , more number of amino than carboxyl groups makes it basic and more carboxyl groups are compared to amino groups makes it acidic . The amino acids , which can be synthesised in the body and must be obtained through diet , are known as essential amino acids. Amino acids are usually colourless, crystalline solids . These are water -solute , high melting solids and behave like salts rather than simple amines or carboxylic acids . This behaviour is due to the presence of both acidic (carboxyl group) and basic (amino group) in the same mlecule . In aqueous solution , the carboxyl group can lose a proton and amino group can accept a proton , giving rise to a dipolar ion known as zwitter ion. This is neutral but contains both positive and negative charges. In zwitter ionic , form amino acids show amphoteric behaviour as they react both with acids and bases. An amino acid contains two amino and one carboxylic group. In which class of amino acids would you place it ?

Knowledge Check

  • The pH of the solution containing following zwitter ion species is

    A
    4
    B
    6
    C
    8
    D
    9

  • The pH of the solution containing following zwitter ion species is

    A
    4
    B
    6
    C
    8
    D
    9

  • A substance forms zwitter ion, it can have functional groups -

    A
    `-NH_(2),-COOH`
    B
    `-NH_(2),-SO_(3)H`
    C
    `-OH,-COOH`
    D
    `(1)` and `(2)` Both

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    Read the given passage ans answer question number 1 to 5 that follow : Amino acids are classified as acidic, baisc or neutral depending unpon the relative number of makes it neutral , more number of amino than carboxyl groups makes it basic and more carboxyl groups are compared to amino groups makes it acidic . The amino acids , which can be synthesised in the body and must be obtained through diet , are known as essential amino acids. Amino acids are usually colourless, crystalline solids . These are water -solute , high melting solids and behave like salts rather than simple amines or carboxylic acids . This behaviour is due to the presence of both acidic (carboxyl group) and basic (amino group) in the same mlecule . In aqueous solution , the carboxyl group can lose a proton and amino group can accept a proton , giving rise to a dipolar ion known as zwitter ion. This is neutral but contains both positive and negative charges. In zwitter ionic , form amino acids show amphoteric behaviour as they react both with acids and bases. What are essintal amino acids

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    Amino acid glycine (NH_(2)-CH_(2)-COOH) exists as a zwitter ion in aq. Solution. The K_(a) and K_(b) values of glycine are 1.6xx10^(-10)(Pk_(a)=9.8) and 2.5xx10^(-12)(pk_(b)=11.6) respectively. The K_(a) and K_(b) values are for zwitter ion of Amino acid with following strctures [NH_(3)^(+)-CH_(2)-COO^(-)] An aqueous solution of glycine has pH:

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