Organic Analysis

Consider the following:
 

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

The major product B is:

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

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

One amongst the following is an alcoholic amino acid?           

Consider the following:
   
Order of stretching frequency in IR-spectroscopy would be:

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 ?           

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

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:

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

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

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

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:

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

Match the following compounds with their respective classes:
  

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

The structure of L-(–)-glucose is:

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

Consider the following: 

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

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

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

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

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:

Major product would be

The major product of the following is:

Consider the following:

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

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 _____________:           

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

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

Which of the following are present in RNA?           

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

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

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

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

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

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

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

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

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)

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

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

The total number of essential amino acids are:

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

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

How many of the following pairs give same osazone?

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

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)

How many moles of formaldehyde will be formed?

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]:

How many essential amino acids are there among following?

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

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

How many of the following compounds form zwittor ions?
Glycine, Sulphanilic acid, Anthranilic acid, Lysine, Tryptophan, Leucine.

The total number of compound for which δ_A>δ_B in ¹H NMR spectroscopy:

The total number of carbonyl compounds which have higher IR stretching frequency than acetone:

The number of reducing sugars among the following is……………..

Number of ¹H NMR signals in Phenanthracene?

If two signal differ by 1.5 ppm in 300 MHz spectrophotometer, how do they differ (in ppm) in 100 MHz?

How many different dipeptides could be made with 20 types of amino acids?