List of top Chemistry Questions asked in JEE Main

will undergo alkaline hydrolysis at a faster rate than

, intramolecular substitution takes place first by involving lone pair of electrons on nitrogen.

Which of the following is the correct order of acidic strength for the following compounds: HNO\(_3\), HClO\(_4\), and HClO\(_3\)?

Find the dimensions of \( \frac{B}{\mu_0} \)

Match the LIST-I with LIST-II (Redox Reactions).

Choose the correct answer from the options given below:

Given below are two statements:
Statement I: D-glucose pentaacetate reacts with 2,4-dinitrophenylhydrazine.
Statement II: Starch, on heating with concentrated sulfuric acid at 100°C and 2-3 atmosphere pressure, produces glucose.
In the light of the above statements, choose the correct answer from the options given below:

The correct order of stability of following carbocations is:

Both acetaldehyde and acetone (individually) undergo which of the following reactions?
A. Iodoform Reaction
B. Cannizzaro Reaction
C. Aldol Condensation
D. Tollen's Test
E. Clemmensen Reduction
Choose the correct answer from the options given below:

In the reaction \( 2A + B \rightarrow C \), if the rate law is \( \text{Rate} = k[A]^2[B] \), what is the overall order of the reaction?

For \([ \text{NiCl}_4 ]^{2-}\), what is the charge on metal and shape of complex respectively?

A weak acid HA has degree of dissociation x. Which option gives the correct expression of \(pH - pK_a\)?

The molecules having square pyramidal geometry are:

Consider ‘n’ is the number of lone pair of electrons present in the equatorial position of the most stable structure of \( \text{ClF}_3 \). The ions from the following with ‘n’ number of unpaired electrons are:
A. \( \text{V}^{3+} \)
B. \( \text{Ti}^{3+} \)
C. \( \text{Cu}^{2+} \)
D. \( \text{Ni}^{2+} \)
E. \( \text{Ti}^{2+} \)
Choose the correct answer from the options given below:

Compare boiling point of given solutions:

(i) \( 10^{-4} \, \text{M NaCl} \)>(ii) \( 10^{-3} \, \text{M NaCl} \)>(iii) \( 10^{-2} \, \text{M NaCl} \)>(iv) \( 10^{-4} \, \text{M urea} \)

(iii) \( 10^{-2} \, \text{M NaCl} \)>(ii) \( 10^{-3} \, \text{M NaCl} \)>(i) \( 10^{-4} \, \text{M NaCl} \)>(iv) \( 10^{-4} \, \text{M urea} \)

(ii) \( 10^{-3} \, \text{M NaCl} \)>(i) \( 10^{-4} \, \text{M NaCl} \)>(iii) \( 10^{-2} \, \text{M NaCl} \)>(iv) \( 10^{-4} \, \text{M urea} \)

(iii) \( 10^{-2} \, \text{M NaCl} \)>(ii) \( 10^{-3} \, \text{M NaCl} \)>(i) \( 10^{-4} \, \text{M NaCl} \)>(iv) \( 10^{-4} \, \text{M urea} \)

Which of the following mixing of 1M base and 1M acid leads to the largest increase in temperature?

Given below are two statements:

When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be:

Find the compound \( A \) from the following reaction sequences: \[ A \xrightarrow{\text{aqua regia}} B \xrightarrow{(1) \, \text{KNO}_3, \, \text{NH}_4\text{OH}} \text{yellow ppt}. \]

The structure of the major product formed in the following reaction is:

In the given structure, number of \( sp \) and \( sp^2 \) hybridized carbon atoms present respectively are:

Based on the data given below: \[ E^\circ_{\text{Cr}_2\text{O}_7^{2-}/\text{Cr}^{3+}} = 1.33 \, \text{V}, \quad E^\circ_{\text{Cl}_2/\text{Cl}^-} = 1.36 \, \text{V}, \quad E^\circ_{\text{MnO}_4^-/\text{Mn}^{2+}} = 1.51 \, \text{V}, \quad E^\circ_{\text{Cr}^{3+}/\text{Cr}} = -0.74 \, \text{V}. \] The strongest reducing agent is:

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:

For the reaction, \[ H_2(g) + I_2(g) \rightleftharpoons 2HI(g) \] Attainment of equilibrium is predicted correctly by:

Match List - I with List - II:

Choose the correct answer from the options given below:

Consider the following sequence of reactions:
i) \( \text{Mg}, \text{dry ether} \)
ii) \( \text{CO}_2, \text{H}_2\text{O}^+ \)
iii) \( \text{NH}_3, \Delta \)
11.25 mg of chlorobenzene will produce \( x \times 10^{-1} \) mg of product B. Given molar mass of C, H, O, N, and Cl as 12, 1, 16, 14, and 35.5 g mol\(^{-1}\), respectively, the value of \( x \) is:

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:

List - I	List - II
(A) Adenine	(I)
(B) Cytosine	(II)
(C) Thymine	(III)
(D) Uracil	(IV)