List of top Chemistry Questions asked in JEE Main

From the vitamins \(A, B-1, B-6, B-12, C, D\), and \(K\), the number of vitamins that can be stored in our body is

Select the option of the correct property Paramagnetic & Diamagnetic \([Ni(CO_4)],[Ni(Cl_4)]^{-2}\)
Which of the following is least iconic
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 IUPAC Name of the compoundis
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?
  1. Column chromatography
  2. Thin layer chromatography
  3. Paper chromatography
Match the following: 
 LIST I LIST II
ALymanINear IR
BBalmerIIFar IR
CPaschenIIIVisible
Dp-fundIVUV
The correct statement about Zn, Cd, Hg are
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 \(47 \degree\)

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R 
Assertion (A) : Benzene is more stable than hypothetical cyclohexatriene 
Reason (R) : The delocalised π-electrons cloud is attracted more strongly by the nuclei of the carbon atoms than the electron cloud localised between two carbon atoms.
In the light of the above statements, choose the correct answer from the options given below

80 mole percent of MgCl2 is dissociated in aqueous solution. The vapour pressure of 1.0 molal aqueous solution of MgCl2 at 38°C is ____mm Hg. (Nearest integer)
Given : Vapour pressure of water at 38°C is 50 mm Hg.

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): Ketoses give Seliwanoff's test faster than Aldoses
Reason (R): Ketoses undergo -elimination followed by formation of furfural
In the light of the above statements, choose the correct answer from the options given below:

Match List I with List II :
LIST I Isomeric pairsLIST II Type of isomers
APropanamine and N-MethylethanamineIMetamers
BHexan-2-one and Hexan-3-oneII
Positional isomers
CEthanamide and HydroxyethanimineII
Functional isomers
Do-nitrophenol and p-nitrophenolIVTautomers
Choose the correct answer from the options given below:
The metal which is extracted by oxidation and subsequent reduction from its ore is:
Match List I with List II
LIST I (Amines)LIST II (pKb​)
AAnilineI3.25
BEthanamineII3.00
CN-EthylethanamineIII9.38
DN, N-DiethylethanamineIV3.29
 Choose the correct answer from the options given below: