List of top Chemistry Questions asked in JEE Main

The molar conductivity of a weak electrolyte when plotted against the square root of its concentration, which of the following is expected to be observed?

In the following substitution reaction:

Given below are two statements: Statement (I): The radius of isoelectronic species increases in the order. \[ {Mg}^{2+}<{Na}^+<{F}^-<{O}^{2-} \] Statement (II): The magnitude of electron gain enthalpy of halogens decreases in the order. \[ {Cl}>{F}>{Br}>{I} \] In light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: 
Statement I: Experimentally determined oxygen-oxygen bond lengths in the \( O_2 \) are found to be the same and the bond length is greater than that of a \( O=O \) (double bond) but less than that of a single \( O-O \) bond. 
Statement II: The strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for the fact that the bond length in ozone is smaller than that of a double bond \( O=O \) but more than that of a single bond \( O-O \). 
In light of the above statements, choose the correct answer from the options given below:

Identify product [A], [B], and [C] in the following reaction sequence.
product [A], [B], and [C] in the following reaction
Given below are two statements: Statement I: CH\(_3\)-O-CH\(_2\)-Cl will undergo \( S_N1 \) reaction though it is a primary halide.
Statement II: {CH_3-C(-CH_3)(-CH_3)-CH_2-Cl}
will not undergo \( S_N2 \) reaction very easily though it is a primary halide. In the light of the above statements, choose the most appropriate answer from the options given below:
The product B formed in the following reaction sequence is: \[ {C}_6{H}_5{CN} \xrightarrow{{HCl}} (A) \xrightarrow{{AgCN}} (B) \]
product B formed in the following reaction sequence
Match List - I with List - II.

\[ \begin{array}{|c|c|} \hline \text{List - I} & \text{List - II} \\ \hline \text{(A) } \text{Ti}^{3+} & \text{(I) } 3.87 \\ \text{(B) } \text{V}^{2+} & \text{(II) } 0.00 \\ \text{(C) } \text{Ni}^{2+} & \text{(III) } 1.73 \\ \text{(D) } \text{Sc}^{3+} & \text{(IV) } 2.84 \\ \hline \end{array} \]

Identify correct statement/s: 
(A) \( -\text{OCH}_3 \) and \( -\text{NHCOCH}_3 \) are activating groups. 
(B) \( -\text{CN} \) and \( -\text{OH} \) are meta directing groups. 
(C) \( -\text{CN} \) and \( -\text{SO}_3\text{H} \) are meta directing groups. 
(D) Activating groups act as ortho- and para-directing groups. 
(E) Halides are activating groups. 

Choose the correct answer from the options given below:

The most stable carbocation from the following is:
Which of the following acids is a vitamin?
The conditions and consequences that favour the \( t_{2g}^3 e_g^1 \) configuration in a metal complex are:
The successive 5 ionisation energies of an element are 800, 2427, 3658, 25024 and 32824 kJ/mol, respectively. By using the above values, predict the group in which the above element is present:
Match the Compounds (List- I) with the appropriate Catalyst/Reagents (List- II) for their reduction into corresponding amines.
Match the Compounds (List- I) with the appropriate Catalyst/Reagents (List- II) for their reduction into corresponding amines.
Propane molecule on chlorination under photochemical condition gives two di-chloro products, "x" and "y". Amongst "x" and "y", "x" is an optically active molecule. How many tri-chloro products (consider only structural isomers) will be obtained from "x" when it is further treated with chlorine under the photochemical condition?

The correct stability order of the following species/molecules is:
 


 

The major product of the following reaction is:


 

The compounds which give positive Fehling's test are:
The compounds which give positive Fehling's test are:
Choose the CORRECT answer from the options given below:

The IUPAC name of the following compound is:

Match the LIST-I with LIST-II 


 

The products formed in the following reaction sequence are:

Given below are two statements: Statement I: One mole of propyne reacts with excess of sodium to liberate half a mole of H₂ gas. Statement II: Four g of propyne reacts with NaNH₂ to liberate NH₃ gas which occupies 224 mL at STP. In the light of the above statements, choose the most appropriate answer from the options given below:

Which among the following react with Hinsberg's reagent?


Choose the correct answer from the options given below:

Given below are two statements: 
 

will undergo alkaline hydrolysis at a faster rate than

involving lone pair of electrons on nitrogen. 
 

The products A and B in the following reactions, respectively, are:
The products A and B in the following reactions