List of top Chemistry Questions asked in JEE Main

On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives A and B while its reaction with HCl produces B and C. A, B and C are, respectively
Concentrated \(HNO_3\) reacts with Iodine to give
100 mL of 5% (w/v) solution of NaCl in water was prepared in 250 mL beaker. Albumin from the egg was poured into NaCl solution and stirred well. This resulted in a/an :
The quantity of electricity of Faraday needed to reduce \(1\) mol of \(Cr_2O_7^{2-}\) to \(Cr^{3+}\) is
The drug tegamet is:
Which one of the following is a water soluble vitamin, that is not excreted easily?
Amongst BeF2, BF3, H2O, NH3, CCl4 and HCl, the number of molecules with non-zero net dipole moment is ______.
For a first order reaction \(A → B\), the rate constant, \(k = 5.5×10^{–14}s^{–1}\). The time required for 67% completion of reaction is \(x×10^{–1}\) times the half life of reaction. The value of \(x\) is _____. (Nearest integer)
Match List-I with List-II
List-I(Mixture) List-II(Purification Process)
(A) Chloroform & Aniline(I) Steam distillation
(B) Benzoic acid & Napthalene(II) Sublimation
(C) Water & Aniline(III) Distillation
(D) Napthalene & Sodium chloride(IV) Crystallisation
Choose the correct answer from the options given below:
Arrange the following carbocations in decreasing order of stability.
carbocations
In alanylglycylleucylalanyvaline, the number of peptide linkages is__,

The final product ‘C’ in the following series of reactions

Refining using the liquation method is the most suitable for metals with:
Among the following which is the strongest oxidizing agent?
The difference in the reaction of phenol with bromine in chloroform and bromine in water medium is due to:

Match List-I with List-II:
 

List-I (Oxide)List-II (Nature)
(A) Cl2O7(I) Amphoteric
(B) Na2O(II) Basic
(C) Al2O3(III) Neutral
(D) N2O(IV) Acidic


Choose the correct answer from the options given below:

The difference between spin only magnetic moment value of \([Co(H_2O)_6]Cl_2\) and \([Cr(H_2O)_6]Cl_3\) is ________ .

\((C_7H_5O_2)_2\stackrel{ℎv}{→} [X]→2C_6H_5+2CO_2\)
Consider the above reaction and identify the intermediate ‘X’

Which of the following is the correct plot for the probability density ψ2(r) as a function of distance ‘r’ of the electron from the nucleus for 2s orbital?

The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is

The major product in the following reaction is:
 

Fig. Chemical Reaction

Match List I with List II.

 List I List II
AZymaseIStomach
BDiastaseIIYeast
CUreaseIIIMalt
DPepsinIVSoyabean

Choose the correct answer from the options given below.

For the reaction given below:
\(CoCl_3.xNH_3 + AgNO_3 (aq) →\)
If two equivalents of AgCl precipitate out, then the value of x will be____.

Given below are two statements:
Statement I : The non bio-degradable fly ash and slag from steel industry used by cement industry.
Statement II : The fuel obtained from plastic waste is lead free.
In the light of the above statements, choose the most appropriate answer from the options given below:
A white precipitate was formed when BaCl2 was added to water extract of an inorganic salt. Further, a gas ‘X’ with characteristic odour was released when the formed white precipitate was dissolved in dilute HCl. The anion present in the inorganic salt is