List of top Chemistry Questions asked in JEE Main

To inhibit the growth of tumours, identify the compounds used from the following : A EDTA B Coordination Compounds of Pt C D-Penicillamine D Cis - Platin Choose the correct answer from the option given below:

Which compound is added to cement to increase its setting time?

The depression in freezing point observed for a formic acid solution of concentration $05\, mL\, L ^{-1}$ is $00405^{\circ} C$ Density of formic acid is $105 \, g \, mL ^{-1}$ The Van't Hoff factor of the formic acid solution is nearly : (Given for water $k _{ f }=186 \, K \, kg \, mol ^{-1}$ )

Which of following are reducing and oxidising agent respectively.

Potassium dichromate acts as a strong oxidizing agent in acidic solution During this process, the oxidation state changes from

Match items of Row I with those of Row II

Which of the following shows an incorrect method of refining?
Identify $X , Y$ and $Z$ in the following reaction (Equation not balanced) $ClO + NO _2 \rightarrow \underline{ X } \stackrel{ H _2 O }{\longrightarrow} \underline{ Y }+\underline{Z}$
Read the following two statements
Statement I: Ionic radius of Li+ is greater than Mg++
Statement II: Lithium and magnesium can't form superoxide
Consider the following:
  1. D.D.T.
  2. Aldrin
  3. Sodium arsenite
  4. Sodium chlorate
How many of these are pesticides?
Boric acid is solid, whereas $BF _3$ is gas at room temperature because of

For which of the following aqueous ion, spin only magnetic moment is 3.87 BM?

Match List I with List II :
 

List-I PolymerList-II used for items
ANylon 6,6IBuckets
BLow density polytheneIINon-stick utensils
CHigh density polytheneIIIBristles of brushes
DTeflonIVToys

\(H_2O_2\) behave like reducing agent in which of the following reactions:

Given below are two statements:
Statement I : H2​O2​ is used in the synthesis of Cephalosporin
Statement II : H2​O2​ is used for the restoration of aerobic conditions to sewage wastes.
In the light of the above statements, choose the most appropriate answer from the options given below :
A cubic solid is made up of two elements $X$ and $Y$ Atoms of $X$ are present on every alternate corner and one at the center of cube $Y$ is at $\frac{1}{3} rd$ of the total faces. The empirical formula of the compound is

Increasing order of stability of the resonance structures is: Choose the correct answer from the options given below:

Adding surfactants in non polar solvent, the micelles structure will look like

the micelles structure
Lithium aluminium hydride can be prepared from the reaction of
Which of the following elements have half-filled f-orbitals in their ground state?
(Given : atomic number $Sm =62 ; Eu =63 ; Tb =65 ; Gd =64, Pm =61$ )
A. $Sm$
B. $Eu$
C. $Tb$
D. $Gd$
E. $Pm$
Choose the correct answer from the options given below :
The correct order of basicity of oxides of vanadium is

The total number of chiral compound/s from the following is ________

Amongst the following, the number of species having the linear shape is $XeF _2, I _3^{+}, C _3 O _2, I _3^{-}, CO _2, SO _2, BeCl _2 \text { and } BCl _2^{\ominus}$
Delicate balance of \(CO_2\) and \(O_2\) is not disturbed by:
Formulae for Nessler's reagent is: