List of top Chemistry Questions asked in JEE Main

Consider the following statements related to temperature dependence of rate constants. Identify the correct statements,
A. The Arrhenius equation holds true only for an elementary homogeneous reaction.
B. The unit of A is same as that of k in Arrhenius equation.
C. At a given temperature, a low activation energy means a fast reaction.
D. A and Ea as used in Arrhenius equation depend on temperature.
E. When Ea >> RT. A and Ea become interdependent.
Choose the correct answer from the options given below :

What is the correct IUPAC name of

The correct orders among the following are:
[A.] Atomic radius : $B<Al<Ga<In<Tl$
[B.] Electronegativity : $Al<Ga<In<Tl<B$
[C.] Density : $Tl<In<Ga<Al<B$
[D.] 1st Ionisation Energy :
In$<Al<Ga<Tl<B$
Choose the correct answer from the options given below :

The sequence from the following that would result in giving predominantly 3, 4, 5 -Tribromoaniline is :

Given below are two statements : Statement I : When a system containing ice in equilibrium with water (liquid) is heated, heat is absorbed by the system and there is no change in the temperature of the system until whole ice gets melted. Statement II : At melting point of ice, there is absorption of heat in order to overcome intermolecular forces of attraction within the molecules of water in ice and kinetic energy of molecules is not increased at melting point. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements :
Statement I : Hyperconjugation is not a permanent effect.
Statement II : In general, greater the number of alkyl groups attached to a positively charged C-atom, greater is the hyperconjugation interaction and stabilization of the cation.
In the light of the above statements, choose the correct answer from the options given below

Given below are two statements :
Statement I : CrO$ _3 $ is a stronger oxidizing agent than MoO$ _3 $
Statement II : Cr(VI) is more stable than Mo(VI) In the light of the above statements, choose the correct answer from the options given below

Given below are two statements :
Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes.
Statement II : Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes.
In the light of the above statements, choose the Correct answer from the options given below

Standard electrode potentials for a few half-cells are mentioned below:

The alpha-helix and beta-pleated sheet structures of a protein are associated with its:

Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given : Molar mass of Mg is 24 g mol$^{-1}$.

In Dumas' method for estimation of nitrogen 0.4 g of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm Hg pressure. The percentage composition of nitrogen in the compound is (Given : Aqueous tension at 300 K = 15 mm Hg)

Identify the diamagnetic octahedral complex ions from below ;
A. [Mn(CN)$_6$]$^{3-}$
B. [Co(NH$_3$)$_6$]$^{3+}$
C. [Fe(CN)$_6$]$^{4-}$
D. [Co(H$_2$O)$_3$F$_3$]
Choose the correct answer from the options given below :

The standard cell potential (E$^\circ_{cell}$) of a fuel cell based on the oxidation of methanol in air that has been used to power a television relay station is measured as 1.21 V. The standard half cell reduction potential for O$ _2 $/H$ _2 $O (E$^\circ_{O_2/H_2O}$) is 1.229 V. Choose the correct statement:

In the following series of reactions identify the major products A and B respectively.

The major product (P) in the following reaction is :

Compounds that should not be used as primary standards in titrimetric analysis are : A. Na$ _2 $Cr$ _2 $O$ _7 $ B. Oxalic acid C. NaOH D. FeSO$ _4 $.6H$ _2 $O E. Sodium tetraborate Choose the most appropriate answer from the options given below :

For electron in '2s' and '2p' orbitals, the orbital angular momentum values, respectively are :

Match the LIST-I with LIST-II.

LIST-I		LIST-II
A.	Pnicogen (group 15)	I.	Ts
B.	Chalcogen (group 16)	II.	Og
C.	Halogen (group 17)	III.	Lv
D.	Noble gas (group 18)	IV.	Mc

Choose the correct answer from the options given below :

Fat soluble vitamins are :
A. Vitamin B$ _1 $
B. Vitamin C
C. Vitamin E
D. Vitamin B$ _{12} $
E. Vitamin K
Choose the correct answer from the options given below :

10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a volumetric flask of 100 mL containing 2 moles of HCl and made the volume upto the mark with distilled water. The solution in this flask is :

40 mL of a mixture of CH$_3$COOH and HCl (aqueous solution) is titrated against 0.1 M NaOH solution conductometrically. Which of the following statement is correct?

Consider the following reaction:

\[ A + NaCl + H_2SO_4 \xrightarrow[\text{Little amount}]{} CrO_2Cl_2 + \text{Side products} \] \[ CrO_2Cl_2(\text{Vapour}) + NaOH \rightarrow B + NaCl + H_2O \] \[ B + H^+ \rightarrow C + H_2O \]

The number of terminal 'O' present in the compound 'C' is ________.

Given:

\[ \Delta^{\Theta}_{sub}[\text{C(graphite)}] = 710 \, kJ \, mol^{-1} \] \[ \Delta_{\text{C-H}}^{\Theta} = 414 \, kJ \, mol^{-1} \] \[ \Delta_{\text{H-H}}^{\Theta} = 436 \, kJ \, mol^{-1} \] \[ \Delta_{\text{C=C}}^{\Theta} = 611 \, kJ \, mol^{-1} \]

The $\Delta H_f^{\Theta}$ for $CH_2 = CH_2$ is _______ $kJ \, mol^{-1}$ (nearest integer value).

During estimation of Nitrogen by Dumas' method of compound X (0.42 g) :

mL of $ N_2 $ gas will be liberated at STP. (nearest integer) $\text{(Given molar mass in g mol}^{-1}\text{ : C : 12, H : 1, N : 14})$