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Heterocyclic Chemistry & Natural Process - Chemistry MCQ


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20 Questions MCQ Test - Heterocyclic Chemistry & Natural Process

Heterocyclic Chemistry & Natural Process for Chemistry 2024 is part of Chemistry preparation. The Heterocyclic Chemistry & Natural Process questions and answers have been prepared according to the Chemistry exam syllabus.The Heterocyclic Chemistry & Natural Process MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Heterocyclic Chemistry & Natural Process below.
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Heterocyclic Chemistry & Natural Process - Question 1

Which of  the following test is used for the detection of aldoses?

Detailed Solution for Heterocyclic Chemistry & Natural Process - Question 1

Seliwanoff's test is a chemical test that distinguishes between aldose and ketose sugars. A mixture of concentrated HCl and resorcinol of 3ml is added to the sugar. Then the solution is boiled for a little time. If it is a ketose sugar like fructose and sucrose is the solution turns cherry red.  

Heterocyclic Chemistry & Natural Process - Question 2

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Heterocyclic Chemistry & Natural Process - Question 3

The enzyme which cuts from the N-terminal side of the amino acids having Leu, Asp and Glu amino acids is/are

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Given, all the enzymes except pepsin cuts from the C-terminal side.

Heterocyclic Chemistry & Natural Process - Question 4

The protecting group of amines which is deprotected by base is

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Heterocyclic Chemistry & Natural Process - Question 5

The number of π-electrons which are in delocalization in pyridine ring is/are____


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there are three π-bonds in pyridine ring. So, that total of 6π-electrons are invoved in delocalization. Hence, aromatic.

*Answer can only contain numeric values
Heterocyclic Chemistry & Natural Process - Question 6

Among the following sugars which gives both Bromine water and Tollen’s Test positive is/are
D-glucose, D-Fructose, D-mannose, D-iodose


Detailed Solution for Heterocyclic Chemistry & Natural Process - Question 6

D-glucose, D-mannose and D-iodose all have aldehydic functional group and gives both positive tests.
While as D-fructose have ketonic functional group and gives negative bromine water test, but positive Tollen’s test.

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Heterocyclic Chemistry & Natural Process - Question 7

The most reactive position for the nitration in the following compounds is 


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 (mild nitrating agent) electrophilic addition on pyrrol takes place at second position then third  And Sn/HCI converts NO2 to NH2 group. 

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Heterocyclic Chemistry & Natural Process - Question 8

If a tripeptide is treated with Sangers reagent followed by hydrolysis. How many amide bonds will be hydrolysed in a peptide chain?


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Heterocyclic Chemistry & Natural Process - Question 9

In the following reaction, how many membered ring will be formed as major product

 


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It is a Reimer-Tiemann reaction and ring expansion is a major product in this reaction,

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Heterocyclic Chemistry & Natural Process - Question 10

Among the following amino acids, how many amino acids having a sulfur groups
(I) Cysteine   (II) Methionine  (III) Arginine  (IV) Valine  (V) Lyscine  (VI) Cystine


Heterocyclic Chemistry & Natural Process - Question 11

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Heterocyclic Chemistry & Natural Process - Question 12

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Heterocyclic Chemistry & Natural Process - Question 13

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Heterocyclic Chemistry & Natural Process - Question 14

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It is a solvent dependent reaction Brin presence of alcoholic solvent gives diacetal but in absence of alcoholic solvent gives polybromination product.

Heterocyclic Chemistry & Natural Process - Question 15

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Heterocyclic Chemistry & Natural Process - Question 16

Give the aromaticity order in the following compounds

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Heterocyclic Chemistry & Natural Process - Question 17

The products (A) and (B) formed in the following reaction sequence are

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Heterocyclic Chemistry & Natural Process - Question 18

The osazone (A) could be obtained from :

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Osazone of D-gulose and D-iodose.

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Heterocyclic Chemistry & Natural Process - Question 19

Among the following amino acids, how many  is/are basic
Val, Arg, His, Cys, Leu, Lys, Met


Detailed Solution for Heterocyclic Chemistry & Natural Process - Question 19

Arg, His, and Lys are the basic amino acids

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Heterocyclic Chemistry & Natural Process - Question 20

Calculate the isoelectronic point value of the salt of Argnine, having pKa values; 10.9, 8.5, 2.2, respectively.


Detailed Solution for Heterocyclic Chemistry & Natural Process - Question 20

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