List of top Chemistry Questions

In the reaction given below ‘B’ is:
In the following reaction
In the following reaction A is
A is
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:
 

2 hexne 03h20
The two products formed in above reaction are
Products The two products formed in above reaction are
Products The two products formed in above reaction are
The major product formed in the following reaction is
In the following reaction 'B' is
In the following reaction 'B' is jee main 2023
Find out the major product from the following reaction.
major product from the following reaction jee main 2023
Given below are two statements :
Statement-I: Morphine is a narcotic analgesis. It helps in relieving pain without producing sleep. 
Statement-II: Morphine and its derivatives are obtained from opium poppy. 
In the light of the above statements, choose the correct answer from the options given below.
A in the above reaction is: me ch3 OET A major products
A in the above reaction 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
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)
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______.
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_____.
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 __
\(XeF_4, SF_4, SiF_4, BF^-_4 BrF^-_4,[Cu(NH_3)_4]^{2+}, [FeCl_4]^{2-}, [PtCl_4]^{2-}\)
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_____.
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

Choose the correct answer from the options given below:

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___
\(PF_5, BrF^− _4 4 − , IF_5\) ; \(BrF_5, XeOF_4, ICl ^−_ 4\)
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)

A hydrocarbon ' $X$ ' with formula $C _6 H _8$ uses two moles of $H _2$ on catalytic hydrogenation of its one mole On ozonolysis, ' $X$ ' yields two moles of methane dicarbaldehyde The hydrocarbon ' $X$ ' is :

'R formed in the following sequence of reactions is :
'R formed in the following sequence of reactions is :

A trisubstituted compound ‘A’, \(\text{C}_{10}\text{H}_{12}\text{O}_2\), gives neutral FeCl\(_3\) test positive. Treatment of compound ‘A’ with NaOH and CH\(_3\)Br gives \(\text{C}_{11}\text{H}_{14}\text{O}_2\), with hydroiodic acid gives methyl iodide, and with hot conc. NaOH gives a compound ‘B’, \(\text{C}_{10}\text{H}_{10}\text{O}_2\). Compound ‘A’ also decolourises alkaline KMnO\(_4\). The number of \(\pi\)-bond/s present in the compound ‘A’ is ______.