List of top Chemistry Questions asked in NEET (UG)

Which functional group participates in disulphide bond formation in proteins?

Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)

The cell membranes are mainly composed of

At $ 25^\circ $, the dissociation constant of a base, BOH is $ 1.0 \times 10^{-12} $. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be

For a first order reaction, $A \longrightarrow B$, the reaction rate at reactant concentration of $0.01\, M$ is found to be $2.0 \times 10^{-5} \, mol \, \, L^{-1} s^{-1}$. The half-life period of the reaction is

Which one of the following is an inner orbital complex as well as diamagnetic in behaviour? (At. no. of Zn = 30, Cr = 24, Co = 27, Ni = 28)

$ H_2S $ gas when passed through a solution of cations containing $HCl$ precipitates the cations of second group in qualitative analysis but not those belonging to the fourth group. It is because

Lanthanoids are

Which of the following forms cationic micelles above certain concentration ?

Which of the following does not have a metal-carbon bond

Which one of the following is a chain growth polymer

A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid

Which of the following is considered to be an anticancer species

If the bond energies of H–H, Br – Br and H –Br are 433, 192 and 364 kJ mol^–1 respectively the ∆Hº for the reaction H₂(g) + Br₂(g) \(\rightarrow\)2HBr(g)

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere

Among the following, the pair in which the two species are not isostructural is

Which one of the following structures represents the peptide chain

Which one of the following can be oxidised to the corresponding carbonyl compound

Camphor is often used in molecular mass determination because

Number of chiral carbons in β–D–(+)– glucose is

The helical structure of protein is stabilized by

H₂O is dipolar, whereas BeF₂ is not. It is because

Ionic radii are

The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl, using

Aniline, when diazotized in cold and then treated with dimethyl aniline, gives a colored product. Its structure would be