List of top Chemistry Questions asked in JEE Main

During bleeding from cut \(FeCl_3\) is used to stop bleeding as
Total spin only magnetic moment of the ion [Mn(SCN)6]x– is 5.92 B.M. Find out the value of x.
If the formula of borax is \(Na_2B_4Ox(OH)y.zH_2O\) , Find the value of x + y + z. 
How many of the following have five radial nodes ? 
5s, 6s, 7s, 6p and 4p 
Which of the following can be represented as a meridional isomer?
Read the following two statements
Statement I: Ionic radius of Li+ is greater than Mg++
Statement II: Lithium and magnesium can't form superoxide
Which of the following metals can be extracted through alkali leaching technique?
How many factors will contribute to a major role in covalent character of a compound.
  1. Polarising power of cation
  2. Polarisability of the anion
  3. Distortion caused by cation
  4. Polarisability of cation

Sulphur (S)-containing amino acids from the following are:
(a) Isoleucine
(b) Cysteine
(c) Lysine
(d) Methionine
(e) Glutamic acid

Which of the following elements is most reactive?
Select the correct order of electronegativity of the elements: B, C, At, S
CH3CH2-Br \(\overrightarrow{Acetone}^{NaI}\) CH3-CH2-I+NaBr
Which of the following statement is correct ? 
Which of the following shows an incorrect method of refining?
Consider the reaction \(Cu^{2+} + X^- → Cu_2X_2 + X_2\).
X2 will be predominantly?
What happens when lyophilic sol is added to lyophobic sol. prevention from coagulation precipitation emulsion electrophoresis
XeF$_4$ reacts with SbF$_5$ to form:
\[ [\text{XeF}_m]^{n+}[\text{SbF}_y]^{z-} \] What is $m+n+y+z$?
Incorrect statement about Borazine is:

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A): Acidic nature follows the order:

Reason (R): F is a better electron-withdrawing group than Cl
In the light of the above statements, write the detailed answer:

Consider the following:
  1. D.D.T.
  2. Aldrin
  3. Sodium arsenite
  4. Sodium chlorate
How many of these are pesticides?
Polymer which is named as orlon is:

Predict expression from α in terms of \(K_{eq}\) and concentration C : 

\(A_2 B_3(aq) \leftrightharpoons 2{A_3} (aq)+3B_{{2-}}(aq)\)

Order of Covalent bond:
A. $KF > KI ; LiF > KF$ 
B. $KF < KI ; LiF > KF$ 
C. $SnCl _4> SnCl _2 ; CuCl > NaCl$ 
D. $LiF > KF ; CuCl <NaCl$
E. $KF < KI ; CuCl > NaCl$ 
Choose the correct answer from the options given below:
Which of the following have square pyramidal structure?
Match the terms in Column-I with their description in Column-II and choose the correct option :
Column IColumn II
(i)Vitamin AaBeri-beri
(ii)Vitamin C (Ascorbic acid)bCheilosis
(iii)RiboflavincXerophthalmia
(iv)ThiaminedScurvy
Which of the following reaction is correct?