List of top Chemistry Questions asked in JEE Main

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

At a given temperature T, gases Ne, Ar, Xe and Kr are found to deviate from ideal gas behaviour. Their equation of state is given as
\(p = \dfrac{RT}{V - b}\)
at T.
Here, b is the van der Waals constant. Which gas will exhibit steepest increase in the plot of Z (compression factor) vs p?

The major product of the following reaction is:

10 mL of 1 mM surfactant solution forms a monolayer covering 0.24 cm\(^2\) on a polar substrate. If the polar head is approximated as cube, what is its edge length?

Assertion: For the extraction of iron, haematite ore is used.
Reason: Haematite is a carbonate ore of iron.

In the following reaction
\(\text{Carbonyl compound} + \mathrm{MeOH} \;\overset{\mathrm{HCl}}{\rightleftharpoons}\; \text{acetal}\)
Rate of the reaction is the highest for :

p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives:

Consider the given plot of enthalpy of the following reaction between A and B.
\(\mathrm{A + B \rightarrow C + D}\)
Identify the incorrect statement.

HF has highest boiling point among hydrogen halides, because it has :

The maximum number of possible oxidation states of actinoides are shown by :

In an acid-base titration, 0.1 M HCl solution was added to the NaOH solution of unknown strength. Which of the following correctly shows the change of pH of the titraction mixture in this experiment?

The correct statements among I to III regarding group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.

Increasing order of reactivity of the following compounds for \(\mathrm{S_N1}\) substitution is:

(A) \((\mathrm{CH_3})_2\mathrm{CH{-}CH_2{-}Cl}\); (B) \(\mathrm{CH_3CH_2Cl}\); (C) 4-methoxybenzyl chloride (\(p\)-\(\mathrm{H_3CO{-}C_6H_4{-}CH_2Cl}\)); (D) benzyl chloride.

Which of the following potential energy (PE) diagrams represents the \(\mathrm{S_N1}\) reaction?

Match the catalysts (Column I) with products (Column II).

Column I	Column II
(A) \(\mathrm{V_2O_5}\)	(i) Polyethylene
(B) \(\mathrm{TiCl_4/Al(Me)_3}\)	(ii) ethanal
(C) \(\mathrm{PdCl_2}\)	(iii) \(\mathrm{H_2SO_4}\)
(D) Iron Oxide	(iv) \(\mathrm{NH_3}\)

The ore that contains the metal in the form of fluoride is :

Consider the van der Waals constants, a and b, for the following gases.

Gas	Ar	Ne	Kr	Xe
a/ (atm dm6 mol-2)	1.3	0.2	5.1	4.1
b/ (10-2 dm3 mol-1)	3.2	1.7	1.0	5.0

Which gas is expected to have the highest critical temperature?

Excessive release of \(\mathrm{CO_2}\) into the atmosphere results in :

Aniline dissolved in dilute HCl is reacted with sodium nitrite at \(0^\circ\mathrm{C}\). This solution was added dropwise to a solution containing equimolar mixture of aniline and phenol in dil. HCl. The structure of the major product is

The major product of the following reaction is :
\(\mathrm{CH_3-C\equiv CH}\ \xrightarrow[\mathrm{(ii)\ DI}]{\mathrm{(i)\ DCl\ (1\ equiv.)}}\)

The osmotic pressure of a dilute solution of an ionic compound XY in water is four times that of a solution of 0.01 M \(\mathrm{BaCl_2}\) in water. Assuming complete dissociation of the given ionic compounds in water, the concentration of XY (in mol \(\mathrm{L^{-1}}\)) in solution is :

Magnesium powder burns in air to give :

The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is :

The one that will show optical activity is :
(en = ethane-1,2-diamine)

For any given series of spectral lines of atomic hydrogen, let \(\Delta\bar{\nu} = \Delta\bar{\nu}_{max} - \Delta\bar{\nu}_{min}\) be the difference in maximum and minimum frequencies in \(\mathrm{cm^{-1}}\). The ratio \(\dfrac{\Delta\bar{\nu}_{Lyman}}{\Delta\bar{\nu}_{Balmer}}\) is :