List of top Chemistry Questions asked in JEE Main

Match List I with List II
LIST I ElementsLIST II Colour imparted to the flame
AK1Brick Red
BCa2Violet
CSr3Apple Green
DBa4Crimson Red
Choose the correct answer from the options given below: 
Incorrect statement about Borazine is:
Out of the following which has maximum CFSE? ( consider with sign)
Total spin only magnetic moment of the ion [Mn(SCN)6]x– is 5.92 B.M. Find out the value of x.
Match List I with List II :
List-I Coordination entityList-II Wavelength of light absorbed in nm
A.\([CoCl(NH_3​)_5​]^{2+}\)I.310
B.\([Co(NH_3​)_6​]^{3+}\)II.475
C.\([Co(CN)_6​]^{3−}\)III.535
D.\([Cu(H_2​O)_4​]^{2+}\)IV.600
Choose the correct answer from the options given below :
Which of the following is not ambidentate ligand

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion: Magnetic moment of [Fe(H2O)6]3+ is 5.92 BM and that of [Fe(CN)6]3– is 1.73 BM Reason: Oxidation state of Fe in both the complexes is +3. In the light of the above statements, choose the correct answer from the options given below

Which of the following is diamagnetic with low spin?

Calculate mass of Tollen’s Reagent Required?

Which of the following can be represented as a meridional isomer?
IUPAC name of the compound \(K_{3}[Co(C_{2}O_{4})_{3}]\) is
The correct order in aqueous medium of basic strength in case of methyl substituted amines is :
Statement-1: Methyl orange is a weak acid 
Statement-2: Benzenoid form of methyl orange is deeply coloured than quinonoid form
Check out which of the above statement is true?

Match the following with the correct name of reaction

ReactionName of reaction
(I)
(P)Gattermann Koch reaction
(II)
(Q)Hell Volhard Zelinsky
(III)
(R)Iodoform reaction
Which of the following is most basic?

How many of the transformations given below would result in aromatic amines?

Match the terms in Column-I with their description in Column-II and choose the correct option:
 Amino Acid Letter Code
(A).Alanine(P).N
(B).Asparagine(Q).A
(C).Aspartic acid(R).R
(D).Arginine(S).D
The correct order in aqueous medium of basic strength in case of methyl substituted amines is :

Graph of X-ray frequency (v)n v/s atomic number (Z) is linear. Find the value of n.

The first ionization enthalpies of $Be , B , N$ and $O$ follow the order

In which of the following pairs of elements electron gain enthalpy difference is highest?

It is observed that characteristic $X$-ray spectra of elements show regularity When frequency to the power " $n$ " ie $v^n$ of $X$-rays emitted is plotted against atomic number " $Z$ ", following graph is obtained

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): The first ionization enthalpy of $3d$ series elements is more than that of group 2 metals
Reason (R): In $3d$ series of elements successive filling of d-orbitals takes place
In the light of the above statements, choose the correct answer from the options given below :
It is observed that characteristic $X$-ray spectra of elements show regularity When frequency to the power " $n$ " ie $v^n$ of $X$-rays emitted is plotted against atomic number " $Z$ ", following graph is obtained
It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power " n " i.e. vn of X-rays emitted is plotted against atomic number " Z ", following graph is obtained.
Inert gases have positive electron gain enthalpy Its correct order is