List of top Chemistry Questions asked in JEE Main

Match List I with List II

List I 

Element detected

 

 List II 

Reagent used/ Product formed

ANitrogenINa2[Fe(CN)5 NO]
BSulphur IIAgNO3
CPhosphorousIIIFe4[Fe(CN)6]3
DHalogenIV(NH4)2 MoO4 

Choose the correct answer from the options given below:
 

The major product formed in the following reaction is
the major product A and B from the the following reaction are
Match List-I with List-II
 List-I-Complex  List-II-CFSE
A [Cu(NH3​)6​]2+I-0.6
B[Ti(H2​O)6​]3+II-2.0
C[Fe(CN)6​]3− III -1.2 
D [NiF6​]4-IV-0.4

Choose the correct answer from the options given below:
In the following reaction 'X' is
CH3 (CH2)4 CH3 \(\frac{A n h y . A l C l _3 }{HCL\triangle}X\) major product
In the reaction given below ‘B’ is:
2-Methyl propyl bromide reacts with C2H5O- and gives 'A' whereas on reaction with C2H5OH it gives 'B'. The mechanism followed in these reactions and the products 'A' and 'B' respectively are
Left hand side and right hand side rings are named as 'A' and 'B'
In the above reaction. Left hand side and right hand side rings are named as 'A' and 'B' respectively. They undergo ring expansion. The correct statement for this process is:
In the reaction given below ‘A’ is
Match the following
Column-AColumn-B
 Nylon 6Natural Rubber 
Vulcanized RubberCross Linked 
cis-1,4-polyisopreneCaprolactam 
PolychloropreneNeoprene.

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D-(+)- Glyceraldehyde  
The two products formed in above reaction are
Match List I with List II
 List I-Examples  List II-Type
A2-Chloro-1, 3-butadiene INylon 2-nylon 6
BNylon 2-nylon 6IISynthetic Rubber
C PolyacrylonitrileIIIPolyester
D DacronIVAddition Polymer

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Number of crystal systems from the following where body centred unit cell can be found, is......
Cubic, tetragonal, orthorhombic, hexagonal, rhombohedral, monoclinic, triclinic.
The number of species having a square planar shape from the following is __
\(XeF_4, SF_4, SiF_4, BF^-_4 BrF^-_4,[Cu(NH_3)_4]^{2+}, [FeCl_4]^{2-}, [PtCl_4]^{2-}\)
Consider the following date
Heat of combustion of H2(g)           = -241.8 kJ mol-1 
Heat of combustion of C(s)              = -393.5 kJ mol-1 
Heat of combustion of C2H5OH(1)  = -1234.7 kJ mol-1
The heat of formation of C2H5OH(1) is (-) ____ kJ mol-1 (Nearest integer)
Among the following, the number of compounds which will give positive iodoform reaction is ____ .
(a) 1-Phenylbutan-2-one 
(b) 2-Methylbutan-2-ol 
(c) 3-Methylbutan-2-ol 
(d) 1-Phenylethanol 
(e) 3,3-dimethylbutan-2-one 
(f) 1-Phenylpropan-2-ol
The standard reduction potential at 298 K for the following half cells are given below  
NO − 3 3 − + 4H+ + 3e- → NO(g) +2H2O E0 = 0.97V 
\(V^{2+} (aq) + 2e^-→V\)           E0 = -1.19V 
\(Fe^{3+}(aq) + 3e^- → Fe\)        E0 = -0.04V 
\(Ag^+ (aq) + e^- → Ag(s)\)      E0 = 0.80V 
\(Au^{3+}(aq)+3e^-→Au(s)\) E0 = 1.40V 
The number of metal(s) which will be oxidized by  \(N0^-_3\) Oin aqueous solution is______.
25.0 mL of 0.050 M Ba(NO3)2 is mixed with 25.0 mL of 0.020 M NaF. Ksp of BaF2 is 0.5 x 10-6 at 298 K. The ratio of [Ba2+] [F-]2 and Ksp is__ (Nearest integer)
At 298 K, the standard reduction potential for Cu2+/Cu electrode is 0.34 V. 
Given: Ksp Cu(OH)2 = 1 × 10-20 
Take \(\frac{2.303RT}{F}\)= 0.059V 
The reduction potential at pH = 14 for the above couple is (-)x x 10-2 V. 
The value of x is_____.
The reaction 2NO + Br2 → 2NOBr 
takes places through the mechanism given below : 
NO + Br2 ⇔ NOBr2 (fast)  
NOBr2 + NO → 2NOBr (slow) 
The overall order of the reaction is_____.
A(g) → 2B(g) + C(g) is a first order reaction. The initial pressure of the system was found to be 800 mm Hg which increased to 1600 mm Hg after 10 min. The total pressure of the system after 30 min will be ___mm Hg. (Nearest integer)
The number of species from the following which have square pyramidal structure is___
\(PF_5, BrF^− _4 4 − , IF_5\) ; \(BrF_5, XeOF_4, ICl ^−_ 4\)
'R formed in the following sequence of reactions is :
'R formed in the following sequence of reactions is :

Consider the following reaction

The correct statement for product $B$ is It is

Given below are two statements:

 Statement I

 under Clemmensen reduction conditions will give

 Statement II

 under Wolff-Kishner reduction condition will give

 In the light of the above statements, choose the correct answer from the options given below: