List of top Chemistry Questions asked in JEE Main

For a reaction $A \xrightarrow{K_1} B \xrightarrow{K_2} C$ If the rate of formation of B is set to be zero then the concentration of B is given by:

In the reaction of potassium dichromate, potassium chloride and sulfuric acid (conc.), the oxidation state of the chromium in the product is (+)_______.

m–chlorobenzaldehyde on treatment with 50\(\%\) KOH solution yields

The coordination geometry around the manganese in decacarbonyldimanganese(0) is

Consider the given chemical reaction sequence :

Total sum of oxygen atoms in Product A and Product B are .........

What is the correct IUPAC name of the given compound?

Which is following compound is easily attacked by electrophile?

Identify 'A' in the following reaction :

Match List – I with List –II.

Choose the correct answer from options given below:

Number of ambidentate ligands among the following is ____.
\[ \text{NO}_2^{-}, \text{SCN}^{-}, \text{C}_2\text{O}_4^{2-}, \text{NH}_3, \text{CN}^{-}, \text{SO}_4^{2-}, \text{H}_2\text{O} \]

Among the following, total number of meta directing functional groups is (Integer based) \(−OCH_3​, −NO_2​, −CN, −CH_3​, −NHCOCH_3​, −COR, −OH, −COOH, −Cl\).

The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is:

The set of meta directing functional groups from the following sets is:

$\textbf{Reduction potential of ions are given below:}$
\[ \begin{array}{ccc} \text{ClO}_4^- & \text{IO}_4^- & \text{BrO}_4^- \\ E^\circ = 1.19 \, \text{V} & E^\circ = 1.65 \, \text{V} & E^\circ = 1.74 \, \text{V} \\ \end{array} \]
The correct order of their oxidising power is:

Identify the incorrect statements regarding primary standard of titrimetric analysis
(A) It should be purely available in dry form.
(B) It should not undergo chemical change in air.
(C) It should be hygroscopic and should react with another chemical instantaneously and stoichiometrically.
(D) It should be readily soluble in water.
(E) KMnO4 & NaOH can be used as primary standard.
Choose the correct answer from the options given below :

Match List I with List II

Choose the correct answer from the options given below:

Aluminium chloride in acidified aqueous solution forms an ion having geometry:

Given below are two statements:
Statement I: The correct order of first ionization enthalpy values of Li, Na, F, and Cl is \( \text{Na} < \text{Li} < \text{Cl} < \text{F} \).
Statement II: The correct order of negative electron gain enthalpy values of Li, Na, F, and Cl is \( \text{Na} < \text{Li} < \text{F} < \text{Cl} \).
In the light of the above statements, choose the correct answer from the options given below:

Number of amine compounds from the following giving solids which are soluble in NaOH upon reaction with Hinsberg's reagent is _____.

The incorrect statement regarding the geometrical isomers of 2-butene is:

The quantity of silver deposited when one coulomb charge is passed through\(AgNO_3\)solution:

The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is -

From the vitamins \( A, \, B_1, \, B_6, \, B_{12}, \, C, \, D, \, E, \, \text{and} \, K \), the number of vitamins that can be stored in our body is ______.

\( A_{(g)} \rightleftharpoons B_{(g)} + \frac{C}{2}_{(g)} \) The correct relationship between \( K_P \), \( \alpha \), and equilibrium pressure \( P \) is:

Match the following : 

(a) \([Cr(H_2O)_6]^{+3}\)	(i) \(t^2_{2g}eg^0\)
(b) \([Fe(H_2O)_6]^{+3}\)	(ii) \(t^3_{2g}eg^0\)
\((c) [Ni(H_2O)_6]^{+2}\)	(iii) \(t^3_{2g}eg^2\)
(d) \([V(H_2O)_6]^{+3}\)	(iv) \(t^6_{2g}eg^2\)