List of top Chemistry Questions

What is the relation between \( \Delta G \) and \( E_{\text{cell}} \)?
What is the oxidation state of Mn in the compound MnO\(_4^{2-}\)?
What is the pKa value of the given compound?
The half-life of a radioactive substance is 5730 years. If carbon-14 decays and only 80% of it remains after a certain period, what is the time elapsed (in years)?
For the given organic reaction, which of the following is the correct product formed when R' = CH\(_3\), R'' = CH\(_2\)CH\(_3\)?
Which of the following compounds can act as a base?
Which of the following is the correct relation for \( A_m \)?
The following reaction occurs: \[ C_6H_6 + X \xrightarrow{\text{Reagents}} Y + Z \] What are the compounds \( X \), \( Y \), and \( Z \)?
The given chemical complex (III) is formed by combining the following ions: (i) what is the charge on the complex? (The structure of the complex is not provided.)
Which form of RNA plays a key role in protein synthesis?
The maximum covalency of a non-metallic group 15 element 'E' with the weakest E-E bond is:
The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet color in non-luminous flame under hot condition in borax bead test is:
Given below are two statements:
Statement I: Like nitrogen that can form ammonia, arsenic can form arsine.
Statement II: Antimony cannot form antimony pentoxide.
In the light of the above statements, choose the most appropriate answer from the options given below:
What is the total charge required for the reduction of 2/3 moles of Al\(_2\)O\(_3\) to form Al?

The correct stability order of the following species/molecules is:
 


 

The successive 5 ionisation energies of an element are 800, 2427, 3658, 25024 and 32824 kJ/mol, respectively. By using the above values, predict the group in which the above element is present:

Match List-I with List-II

Choose the correct answer from the options given below :

Propane molecule on chlorination under photochemical condition gives two di-chloro products, "x" and "y". Amongst "x" and "y", "x" is an optically active molecule. How many tri-chloro products (consider only structural isomers) will be obtained from "x" when it is further treated with chlorine under the photochemical condition?
Which one of the following reactions will not lead to the desired ether formation in major proportion?
(iso-Bu = isobutyl, sec-Bu = sec-butyl, nPr = n-propyl, tBu = tert-butyl, Et = ethyl)

Which among the following react with Hinsberg's reagent?


Choose the correct answer from the options given below:

For \([ \text{NiCl}_4 ]^{2-}\), what is the charge on metal and shape of complex respectively?
What is the electronic configuration for \( [Ni(CN)_4]^{2-} \)?

Given below are two statements: 
Statement (I): For a given shell, the total number of allowed orbitals is given by \( n^2 \). 
Statement (II): For any subshell, the spatial orientation of the orbitals is given by \( -l \) to \( +l \) values including zero. In the light of the above statements, choose the correct answer from the options given below:

Which one of the following, with HBr, will give a phenol?
The correct set of ions (aqueous solution) with the same colour from the following is: