List of top Chemistry Questions asked in JEE Main

Best reducing agent among the given ions are:

If standard enthalpy of vaporization of $CCl_4$ is $30.5$ kJ/mol, find heat absorbed for vaporization of $294 $ gm of $CCl_4$. [Nearest integer] [in kJ/mol]

IUPAC Name of the compound

is

A gas ‘X’ is added to Nessler’s reagent then brown precipitate is formed, gas X is

In chromatographic techniques, which of the following follows preferential adsorption?

Column chromatography
Thin layer chromatography
Paper chromatography

Match the following:

	LIST I		LIST II
A	Lyman	I	Near IR
B	Balmer	II	Far IR
C	Paschen	III	Visible
D	p-fund	IV	UV

The correct statement about Zn, Cd, Hg are

The major product in the above reaction is

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 is homoleptic complex?

Statement I: $[Ni(H_2O)_6]^{2+}$ is green in colour.
Statement II: $[Ni(ON)_4]^{2-}$ is colourless.

Magnetic behavior of $Ni^{2+}$ with strong ligand

Moles of $CH_4$ required for formation of $22$ $g$ of $CO_2$ is $m \times 10^{-2}$ The value of $m$ is:

The total number of different alkanes formed when the following mixture is subjected to electrolysis: $CH_3COONa (aq)$ and $C_2H_2COONa (aq)$is (do not consider disproportionation reaction)

If one faraday of electricity is used in the discharging of $Cu^{2+}$, then find the mass (ing) of $Cu$ deposited (nearest integer)

The spin only magnetic moment of complex ion $[Ni(NH_3)_6]^{2+}$+ is $X \times 10^{-1}$ $BM$. The value of $X$ is

Rms velocity of hydrogen at which temperature is equal to that of the oxygen molecule at $47 \degree$

Number of moles of $AgCl$ formed in the following reaction is

The number of following statements which are incorrect line emission

What is the ratio of σ and pi bonds in pyrophosphoric acid ?

For certain chemical reaction X 🡢 Y, the rate of formation of product is plotted against the time as shown in the figure. The number of correct statement/s from the following is______.
(A) Over all order of this reaction is one
(B) Order of this reaction can't be determined
(C) In region I and III, the reaction is of first and zero order respectively
(D) In region-II, the reaction is of first order
(E) In region-II, the order of reaction is in the range of 0.1 to 0.9.

Decreasing order of dehydration of the following alcohols is

Match List I with List II

LIST I		LIST II
A	Cobalt catalyst	I	$(H_2+Cl_2)$ production
B	Syngas	II	Water gas production
C	Nickel catalyst	III	Coal gasification
D	Brine solution	IV	Methanol production

Choose the correct answer from the options given below:

The number of units, which are used to express concentration of solutions from the following is _______
Mass percent, Mole, Mole fraction, Molarity, ppm, Molality