List of top Chemistry Questions asked in JEE Main

What is the correct IUPAC name of the given compound?

Match List I with List II

Choose the correct answer from the options given below:

Which of the following compounds has the highest boiling point?

What is the order of reducing character for \(AsH_3, NH_3, PH_3\) (group \(15\) hydrides)?

Which of the following compounds in 3d series does not show +3 oxidation state?

Which of the following sets of elements can be detected by Lassaigne's Test ?

Solubility of \(Ca_3(PO_4)_2\) in \(100\) \(mL\) of pure water is \(W\) gm. Find out \(K_{sp}\) of \(Ca_3(PO_4)_2\) is: (M: Molecular mass of \(Ca_3(PO_4)_2\))

A \(10\) \(mL\) hydrocarbon \((C_2H_4)\) on combustion give \(40\) \(mL\) \(CO_2\) and \(50\) \(mL\) \(H_20\). Calculate the value of \(x+y\)

Which of the following has the highest 3rd ionization energy?

Which of the following compounds has intramolecular hydrogen bonding in it?

Which of the following compounds have colour due to d-d transition?

Number of radial nodes present in 3p are

Which of the following have a trigonal bipyramidal shape?
\(PF_5, PBr_5, [PtCl_4], SF_6, BF_3, BrF_5, PCl_5, [Fe(CO)_5]\)

We are given with three NaCl samples and their Van't Hoff factors. Which is correct option ?

Sample	Van't Haff Factor
Sample - 1 (0.1 M)	\(i_1\)
Sample - 2 (0.01 M)	\(i_2\)
Sample - 3 (0.001 M)	\(i_2\)

Which of the following is correct for adiabatic free expansion against vacuum?

Complementary stand of DNA ATGCTTCA is:

Which is following compound is easily attacked by electrophile?

Given below are two statements :
Statement I : Gallium is used in the manufacturing of thermometers.
Statement II : A thermometer containing gallium is useful for measuring the freezing point (256 K) of brine solution.
In the light of the above statement, choose the correct answer from the options given below :

An ideal gas undergoes a cyclic transformation starting from the point \( A \) and coming back to the same point by tracing the path \( A \to B \to C \to A \) as shown in the diagram. The total work done in the process is \( \_\_\_\_ \) J.

Number of compounds with one lone pair of electrons on central atom amongst following is
\(CIF_3, XeO_3, BrF_5, XeF_4, O_3, NH_3\),\( H_2O\)

Match List - I with List - II.

List - I (Pair of Compounds)	List - II (Isomerism)
(A) n-propanol and Isopropanol	(I) Metamerism
(B) Methoxypropane and ethoxyethane	(IV) Functional Isomerism
(C) Propanone and propanal	(III) Position Isomerism
(D) Neopentane and Isopentane	(II) Chain Isomerism

The correct sequence of electron gain enthalpy of the elements listed below is
A. Ar 
B. Br 
C. F 
D. S 
Choose the most appropriate from the options given below:

$\Delta_{vap}H^\circ$ for water is $+40.49 \, \text{kJ mol}^{-1}$ at 1 bar and $100^\circ\text{C}$. Change in internal energy for this vaporisation under same condition is .............. kJ mol$^{-1}$. (Integer answer)
(Given R = 8.3 J K$^{-1}$ mol$^{-1}$)

A hypothetical electromagnetic wave is show below.

The frequency of the wave is x × 10¹⁹ Hz. x = ______ (nearest integer)