List of top Chemistry Questions asked in NEET (UG)

The absolute enthalpy of neutralisation of the reaction: MgO_(s)+2HCl_(aq) \(\rightarrow\) MgCl_2(aq)+H₂O (l) will be:

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

A solution of urea (mol mass $56\, g\, mol^{-1})$ boils at $100.18 ^\circ\,C$ at the atmospheric pressure. If $K_f$ and $K_b$ for water are $1.86$ and $0.512\, K\, kg$ $mol^{-1}$ the above solution will freeze at

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

Electrolytic reduction of nitrobenzene weakly acidic medium gives:

Which one of the following forms micelles in aqueous solution above certain concentration?

Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

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)

The aqueous solution containing which one of the following ions will be colourless?(Atomic no: Sc=21, Fe=26, Ti=22, Mn=25)

Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?

Which of the following is the electron deficient molecule?

The rate of reaction between two reactants A and B decreases by a factor of 4,if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is:

$ 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

The correct sequence of increasing covalent character is represented by

Which of the following would have a permanent dipole moment?

In a set of reactions, acetic acid yielded a product D.
CH₃COOH \(\xrightarrow[]{SOCl_2}\) A \(\xrightarrow[Anhyd.AlCl_3]{Benzene}\) B \(\xrightarrow[]{HCN}\) C \(\xrightarrow[]{HOH}\) D
The structure of D would be:

Products of the following reaction:

The surface tension of which of the following liquid is maximum

The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be:

Which of the following forms cationic micelles above certain concentration ?

Which one of the following is a chain growth polymer

Lanthanoids are