List of top Chemistry Questions asked in NEET (UG)

The correct decreasing order of oxidation state of the underlined atom in each molecule is

According to crystal field theory, the correct order of ligands with respect to their decreasing order of field strength is

The correct statement is

In an acidic medium, 10 mL of 0.25 M oxalic acid is titrated with \(KMnO_4\) solution. If the volume of \(KMnO_4\) solution required to reach the end point is 10 mL, the strength of the \(KMnO_4\) solution is

Arrange the following compounds in the increasing order of polarity: \[ \text{A. } CH_3CH_2OCH_2CH_3 \] \[ \text{B. } CH_3CH_2OH \] \[ \text{C. } CH_3COCH_3 \] \[ \text{D. } CH_3COOH \] Choose the correct answer from the options given below:

The amino acid that gives a red-blood colour on treating its sodium fusion extract with sodium nitroprusside is

Among the following, the compound having conjugated double bonds is

In potash alum, the ratio of \(\text{K}^+\) and \(\text{SO}_4^{2-}\) ions is

Consider the following statements about the solutions formed by mixing two liquids.

• [A.] An ideal solution thus formed obeys Raoult's law throughout the composition range.

• [B.] Mixture of chloroform and acetone shows negative deviation from Raoult's law.

• [C.] Mixture of aniline and phenol shows positive deviation from Raoult's law.
Select

A 1:3 electrolyte in an aqueous solution is

The standard electrode potential (\(E^\circ\)) for the half-cell reaction \(\text{Fe}^{3+} + e^- \rightarrow \text{Fe}^{2+}\) at \(298\text{ K}\) is (Given: \(E^\circ(\text{Fe}^{3+}/\text{Fe}) = -0.04\text{ V}\) and \(E^\circ(\text{Fe}^{2+}/\text{Fe}) = -0.44\text{ V}\) at \(298\text{ K}\))

Two moles of an ideal gas undergo free expansion from \( 10\text{ L} \) to \( 100\text{ L} \) at \( 300\text{ K} \). The values of \( \Delta S_{\text{system}} \) and \( \Delta S_{\text{surroundings}} \) are (\(R\) is universal gas constant)

The amount of carbon dioxide evolved upon complete combustion of \(116\text{ g}\) of \(n\)-butane is
(Given: atomic mass in amu \(\text{H} = 1\), \(\text{C} = 12\) and \(\text{O} = 16\))

The complex which has facial and meridional isomers is
(Given : \(\text{py} = \text{pyridine}\) and \(\text{en} = \text{H}_2\text{N}-\text{CH}_2-\text{CH}_2-\text{NH}_2\))

The compound that CANNOT be obtained from the aldol condensation reaction shown below, is

Consider the following schematic plots of orbital wavefunction (\(\psi_r\)) against distance (\(r\)) from the nucleus.

The figure representing two radial nodes in the orbital is

Given below are two statements:
Statement-I : Oxidation of \(p\)-nitrotoluene with acidic \(\text{KMnO}_4\) gives an acid that is stronger than benzoic acid.
Statement-II : Reduction of \(p\)-nitrotoluene with Sn/HCl followed by neutralization gives an amine that is more basic than aniline.
In light of the above statements, choose the most appropriate answer from the options given below.

The correct statement about peptides and proteins is

Identify the reactions which give aniline as the major product.

Given below are two statements:
Statement-I : Heating NaCl with concentrated $\text{H}_2\text{SO}_4$ and $\text{MnO}_2$ results in oxidation of Mn.
Statement-II : Heating NaI with concentrated $\text{H}_2\text{SO}_4$ and $\text{MnO}_2$ results in reduction of Mn.
In light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements:
Statement-I : $[\text{Fe}(\text{ox})_3]^{3-}$ is chiral.
Statement-II : trans-$[\text{Cr}(\text{H}_2\text{O})_2(\text{ox})_2]^-$ is chiral.
(Given : \(\text{oxH}_2 = \text{HOOC}-\text{COOH}\))
In light of the above statements, choose the most appropriate answer from the options given below:

Among the following options, the correct trend in the electron gain enthalpy is

For an elementary chemical reaction, the Arrhenius plot is given below.

If the energy of activation is $6.64 \text{ kJ mol}^{-1}$ and $R = 8.3 \text{ J K}^{-1}\text{ mol}^{-1}$, the temperature at which the rate constant becomes $e^2 \text{ min}^{-1}$, is

The green paramagnetic species formed by heating $\text{KMnO}_4$ at $513\text{ K}$ is

The formula of tetraammineaquachloridocobalt(III) chloride is