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Organic Analysis

60 Questions MCQ Test MOCK Test Series for IIT JAM Chemistry | Organic Analysis

Description

This mock test of Organic Analysis for Chemistry helps you for every Chemistry entrance exam. This contains 60 Multiple Choice Questions for Chemistry Organic Analysis (mcq) to study with solutions a complete question bank. The solved questions answers in this Organic Analysis quiz give you a good mix of easy questions and tough questions. Chemistry students definitely take this Organic Analysis exercise for a better result in the exam. You can find other Organic Analysis extra questions, long questions & short questions for Chemistry on EduRev as well by searching above.

QUESTION: 1

Which of the following compound is expected to show a sharp singlet for one of its protons at δ ≥ 8 ppm in ¹H NMR spectrum, given that this signal remains unaffected on shaking the solution thoroughly with D₂O?

A.
CH₃CO₂H
B.
CH₃CONHC₆H₅
C.
D.
n—C₆H₁₃CHO

Solution:

QUESTION: 2

Sometimes, the color observed in Lassaigne’s test for nitrogen is green. It is because of:

A.
Green color of ferrous sulfate
B.
Ferric ferrocyanide is also green
C.
Green color of copper sulfate
D.
Due to incomplete fusion Excess of Fe³⁺ ions whose yellow color makes the blue color of ferric ferrocyanide to appear green.

Solution:

QUESTION: 3

Arrange the following molecules, in their chemical shift value(s) of ortho hydrogen in 1H NMR:

A.
I > IV > II > III
B.
I > II > III > IV
C.
I > III > II > IV
D.
I > IV > III > II

Solution:

QUESTION: 4

Consider the following:

Order of C-H stretching frequency in IR-spectroscopy would be:

A.
I > III > II
B.
III > II > I
C.
I > II > III
D.
III > I > II

Solution:

QUESTION: 5

The major product B is:

Solution:

QUESTION: 6

The complementary strand of DNA for the following single stranded DNA sequence: is:

Solution:

QUESTION: 7

The correct sequence of the amino acids present in the tripeptide given below is:

A.
Val-Ser-Thr
B.
Val-Thr-Ser
C.
Leu-Ser-Thr
D.
Leu-Thr-Ser

Solution:

QUESTION: 8

One amongst the following is an alcoholic amino acid?

A.
Cysteine
B.
Lysine
C.
Glutamine
D.
Serine

Solution:

QUESTION: 9

Consider the following:

Order of stretching frequency in IR-spectroscopy would be:

A.
I > II > IV > III
B.
I > II > III > IV
C.
II > I > III > IV
D.
II > I > IV > III

Solution:

QUESTION: 10

For the detection of sulfur in an organic compound, Lassaigne’s extract is acidified with acetic acid. Lead acetate solution is then added to it. The black precipitate formed is due to the formation of ?

A.
Na₂S
B.
PbSO₄
C.
PbS
D.
PbS₂O₃

Solution:

QUESTION: 11

Which of the following compound show only two signals in ¹H NMR and a strong IR bond at
~1690 cm^–1:

Solution:

QUESTION: 12

A compound with molecular formula C₅H₁₀O does not form, 2, 4-DNP derivative. It responds positively to Iodoform test and on ozonolysis gives one mole formaldehyde. It could be:

Solution:

QUESTION: 13

The correct match of the ¹H NMR chemical shift d of the following species/compound is:

A.
(I) 5.4; (II) 7.2; (III) 9.2
B.
(I) 9.2; (II) 7.2; (III) 5.4
C.
(I) 9.2; (II) 5.4; (III) 7.2
D.
(I) 7.2; (II) 9.2; (III) 5.4

Solution:

QUESTION: 14

In the Lassaigne’s test for the detection of nitrogen in an organic compound, the Prussian blue colour is due to the formation of _______________:

A.
K_₃[Fe(CN)_₆]
B.
Fe_₄[Fe(CN)_₆]_₃
C.
Na_₄[Fe(CN)_₅NOS]
D.
K₃[Fe(CN)_₆]

Solution:

QUESTION: 15

The correct order of ¹H NMR chemical shift (δ) values for the labeled methyl groups in the following compound is:

A.
Me¹< Me² < Me³ < Me⁴
B.
Me³ < Me⁴ < Me¹ < Me²
C.
Me³ < Me¹< Me⁴ < Me²
D.
Me² < Me⁴ < Me³ < Me¹

Solution:

QUESTION: 16

The Beckmann rearrangement of a bromo-acetophenone oxime (C₈H₈BrNO) gives a major product having the following ¹H NMR – 9.85 (S, 1H), 7.88 (S, 1H), 7.45 (d, 1H, J=7.2), 7.17 (m, 1H, 7.12 (d, 1H, J=7.0 Hz), 2.06 (S, 3H). The structure of the product is:

Solution:

QUESTION: 17

The absorption at l_max 279 nm (ε = 15) in the UV spectrum of acetone is due to:

Solution:

QUESTION: 18

Match the following compounds with their respective classes:

A.
I: steroid; II: terpenoid; III: alkaloid; IV: DNA base
B.
I: terpenoid; II: steroid; III: alkaloid; IV: DNA base
C.
I: terpenoid; II: steroid; III: DNA base; IV: alkaloid
D.
I: steroid; II: terpenoid; III: DNA base; IV: alkaloid

Solution:

QUESTION: 19

The structure of D-(+)-glucose is:

The structure of L-(–)-glucose is:

Solution:

QUESTION: 20

Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution?

Solution:

QUESTION: 21

Consider the following:

Order of their stretching frequency in IR-spectroscopy would be:

A.
I > II > III
B.
III > II > I
C.
III > I > II
D.
II > I > III

Solution:

QUESTION: 22

In the UV-visible absorption spectrum of an α, β-unsaturated carbonyl compound, with increasing solvent polarity:

A.
n-π* transition undergoes Hypsochromic shift, π-π* undergo Bathochromic shift
B.
n-π* transition undergoes Bathochromic shift, π-π* undergo Hypsochromic shift
C.
Both n-π* and π-π* transition undergoes Bathochromic shift
D.
Both n-π* and π-π* transition undergoes Hypsochromic shift

Solution:

QUESTION: 23

Among the following, the compound that displays an IR band at 2150 cm^–1 is:

Solution:

QUESTION: 24

The compound which shows IR frequencies at both 3314 and 2126 cm^–1 is:

Solution:

QUESTION: 25

Solution:

QUESTION: 26

Compound I gives a strong infrared absorption at 1730 cm^–1. ¹H NMR spectrum indicates that it has two types of hydrogen atoms; one H atom appearing as singlet at δ = 9.7 ppm and 9H atoms appearing as a singlet at δ = 1.2 ppm. The structure of I is:

Solution:

QUESTION: 27

Major product would be

Solution:

QUESTION: 28

The major product of the following is:

Solution:

QUESTION: 29

Consider the following:

Order of C-O stretching frequency in IR-spectroscopy would be:

A.
I > II and III > IV
B.
II > I and IV > III
C.
I > II and IV > III
D.
II > I and III > IV

Solution:

QUESTION: 30

During the detection of sulfur in an organic compound, the violet color formed by the addition of Sodium nitroprusside to Lassaigne’s extract is due to _____________:

A.
Na₄[Fe(CN)₅NO]
B.
Na₄[Fe(CN)₅NS]
C.
Na₃[Fe(CN)₅NS]
D.
Na₄[Fe(CN)₅NOS]

Solution:

*Multiple options can be correct

QUESTION: 31

Lassaigne’s test for the detection of nitrogen do/does not fail in:

A.
NH2CONHNH2.HCl
B.
C.
NH2CONH2
D.
C6H5NHNH2.HCl

Solution:

*Multiple options can be correct

QUESTION: 32

Which of the following compound exist(s) in Zwitter ion form:

Solution:

Amino acids and Sulfamic acids exist as Zwitter Ions. Option C is neither an amino acid nor sulfamic acid so, does not exist as Zwitter ion where as the rest of them do.

*Multiple options can be correct

QUESTION: 33

Which of the following are present in RNA?

A.
Adenine
B.
Guanine
C.
Cytosine
D.
Uracil

Solution:

*Multiple options can be correct

QUESTION: 34

Which of the following is/are alkaloid(s):

Solution:

*Multiple options can be correct

QUESTION: 35

An organic compound having the molecular formula C₁₀H₁₄ exhibited three singlets in the ¹H NMR spectrum. The compound(s) may be:

Solution:

*Multiple options can be correct

QUESTION: 36

Which of the following molecule/s will absorb infrared radiation?

A.
CO
B.
Cl₂
C.
COCl₂
D.
HCN

Solution:

*Multiple options can be correct

QUESTION: 37

Which of the following statement(s) is correct about the Amino acids:

A.
They have high melting points
B.
They are more soluble in water than ether
C.
They have much larger dipole moments than simple amines or simple acids
D.
They are less acidic than most carboxylic acids and less basic than most amines.

Solution:

*Multiple options can be correct

QUESTION: 38

Identify the correct pair of statements.

(i) Alternate name of thymine is 5-methyl uracil
(ii) Arachidonic acid molecule contains less number of carbons than palmitic acid
(iii) Cellulose contains complex halices
(iv) Aquaporin is a polypeptide

A.
(i) and (ii)
B.
(i) and (iii)
C.
(i), (ii) and (iv)
D.
(i) and (iv)

Solution:

i) Thymine is a nitrogenous base which pairs with adenine by the formation of two hydrogen bond. The molecular structure includes a ring of carbon and nitrogen with nitrogen at first and third position. A methyl group is attached to fifth carbon and an oxygen atom is attached to the second carbon. It is also known as 5-methyl uracil.

iv) Aquaporin is a water transport channel present in the cell membrane which is present in the cell. It helps in the selective transport of the water molecules.

Whereas, cellulose is the polysaccharide of unbranched chain and arachidonic acid (C20H32O2) has more number of the carbon atom as compared to palmitic acid (C12H22O2).

So, the correct answer is option D.

*Multiple options can be correct

QUESTION: 39

Which of the following pyrimidine base(s). Find in DNA:

Solution:

*Multiple options can be correct

QUESTION: 40

Out of following which is not an excitation source in IR-spectroscopy is:

A.
Tungsten lamp
B.
Nernst glower
C.
Deuterium lamp
D.
Mercury arc

Solution:

*Answer can only contain numeric values

QUESTION: 41

The maximum no of dipeptides that could be obtained by reaction of phenylalanine with leucine is____?

Solution:

*Answer can only contain numeric values

QUESTION: 42

Calculate the isoelectric point (pI) of lysine. Given the pK_a of α-NH₃ is 8.95, pK_a of side chain NH₃ is 10.53 and pK_a of α-COOH is 2.18………………: (up to 2 decimal place)

Solution:

*Answer can only contain numeric values

QUESTION: 43

Thymine is a DNA base and has a –CH₃ group at X^th position. ‘X’ is:

Solution:

*Answer can only contain numeric values

QUESTION: 44

The value of (X + Y) would be if X = Total number of Monoterpenes and Y = Total number of Diterpenes

Solution:

*Answer can only contain numeric values

QUESTION: 45

The total number of essential amino acids are:

Solution:

*Answer can only contain numeric values

QUESTION: 46

In the Iodoform reaction of RCOCH₃, ‘X’ mole of I₂ and ‘Y’ mole of NaOH are used. Find the value of ‘X + Y’:

Solution:

*Answer can only contain numeric values

QUESTION: 47

Number of correct statements are:

I. Tertiary amines are insoluble in HBr

II. Secondary amines are insoluble in NaOH

III. Primary amines on treatment with NaNO₂/HCl produce N₂ gas

IV. Generally, amino acids on treatment with Ninhydrin produce blue-voilet color

V. Fehling’s solution gives positive test for both aliphatic and aromatic aldehydes

VI. Acetic acid on treatment with FeCl₃ produces blood red coloration

VII. Formic acid gives positive Tollen’s test

Solution:

*Answer can only contain numeric values

QUESTION: 48

How many of the following pairs give same osazone?

Glucose-Fructose, Galactose-Talose, Altrose-Allose, Ribose-Arabinose, Idose-Gulose

Solution:

*Answer can only contain numeric values

QUESTION: 49

Given the fact that 1, 3-butadiene has a UV absorption of 217 nm, the absorption wavelength (in nm) for the conjugated system shown below is……………,

(Use these absorption values for auxochromes groups:Alkyl: + 5; exo-cyclic double bond: + 5 every additional conjugated C = C : + 30)

Solution:

*Answer can only contain numeric values

QUESTION: 50

How many moles of formaldehyde will be formed?

Solution:

*Answer can only contain numeric values

QUESTION: 51

If 500 glucose molecules are used to make starch, how many molecules of water would be produced in the condensation reactions? [Think of starch as a linear chain of glucose molecules]:

Solution:

*Answer can only contain numeric values

QUESTION: 52

How many essential amino acids are there among following?

Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine

Solution:

*Answer can only contain numeric values

QUESTION: 53

How many of the following statements regarding structure of proteins is/are true?
I. Primary structure helps in sequencing of amino acids and location of disulfide bonds.
II. Secondary structure sets up Protein back-bone
III. Denaturation of proteins is reversible
IV. Tertiary structure is found in globular proteins and can be revealed by X-ray crystallography
V. Keratin form derivatives of skin like hairs, feathers, claws, horns etc.
VI. Actin and Myosin are called Muscle proteins
VII. Thrombin helps in blood coagulation