List of top Chemistry Questions

The primary and secondary valencies of cobalt respectively in \([ Co(NH_3)_5Cl]Cl_2\) are :

The element expected to form largest in achieve the nearest noble gas configuration.

What is the correct order of acidity of the protons marked A-D in the given compounds?
What is the correct order of acidity
A in the above reaction is: me ch3 OET A major products
A in the above reaction is:

Which of the following will not give test for Cl- with AgNO3(aq) at 250C?

A pair of compounds having the same boiling points are
Solid fuel used in rocket is a mixture of Fe₂O₃ and Al (in ratio 1 : 2) the heat evolved (KJ) per gram of the mixture is ______ (Nearest integer)
Given \(\Delta H_f^{\circ}(Al_2O_3) = -1700 \, \text{KJ mol}^{-1}\)
\(\Delta H_f^{\circ}(Fe_2O_3) = -840 \, \text{KJ mol}^{-1}\) }
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Helium is used to dilute oxygen in diving apparatus.
Reason R: Helium has high solubility in O2.
In the light of the above statements, choose the correct answer from the options given below.
The electronic configuration of Cu2+ (Z = 29) is:
Identify one anionic radical in the given inorganic salt ``M$_3$'' by performing dry and wet tests.
Identify one cationic radical in the given inorganic salt ``M$_3$'' by performing dry and wet tests.
Prepare soap in the laboratory and submit it for inspection.
Determine the presence of nitrogen atom in the given organic compound O₃.
Determine the molarity of Na$_2$CO$_3$ solution with the help of supplied H$_2$SO$_4$ solution by volumetric analysis method.
Identify one functional group in the given organic compound O₃.
Determine the molarity of the given KMnO$_4$ solution with the help of supplied Mohr's salt solution by titration method.
Determine the molarity of HCl solution with the help of supplied NaOH solution by volumetric analysis method.
How would you distinguish between the following compounds by chemical tests?
(i) Formaldehyde and Acetaldehyde
(ii) Acetaldehyde and Acetone
Determine the molarity of the given KMnO$_4$ solution with the help of supplied oxalic acid solution by volumetric analysis method.
“Formic acid behaves both as an aldehyde and an acid.” Explain.
What is soap? How does it act in cleansing clothes?
“Compounds of transition elements are paramagnetic and coloured.” Explain.
What is electrochemical cell? Explain the structure of an electrochemical cell.
Explain the principle of manufacturing sulphuric acid by contact process.
Write the reaction of conc. sulphuric acid with oxalic acid.