List of top Chemistry Questions

Assertion (A): [Cr(H_2O)_6]Cl_2 and [Fe(H_2O)_6]Cl_2 are examples of homoleptic complexes. 
Reason (R): All the ligands attached to the metal are the same.

Arrange the following compounds in increasing order of their boiling points:
 increasing order of their boiling points

The correct IUPAC name of \([ \text{Pt}(\text{NH}_3)_2\text{Cl}_2 ]^{2+} \) is:

Acidified \(KMnO_4\) oxidizes sulphite to: 

For the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g), the equilibrium constant Kc is 0.5 at 400 K. If [N₂] = 0.1 M, [H₂] = 0.2 M, and [NH₃] = 0.05 M, what is the reaction quotient Qc?
Which of the following molecules has a trigonal planar molecular geometry?
A gas undergoes an isothermal process at 300 K, and its volume increases from 2 L to 4 L. If the initial pressure is 2 atm, what is the work done by the gas? (R = 8.314 J/mol·K, assume 1 mole)
Which of the following is liquid at ordinary temperature?
Arrange the following bases in increasing order of their basic strength:

Sodium hydroxide
Magnesium hydroxide
Aluminium hydroxide
Ammonium hydroxide
Select the correct answer using the code given below:
The correct order of increasing chemical reactivity of the following metals is:
Ammonia evolved from \(0.75\,\text{g}\) of the soil sample in the Kjeldahl’s method for nitrogen estimation neutralises \(10\,\text{mL}\) of \(1\,\text{M}\) \(H_2SO_4\). Find the percentage of nitrogen present in the soil.
The main constituent of vinegar is:
The early attempt to classify elements as metals and non-metals was made by:
The long form of the periodic table consists of:
Which of the following pair is/are correctly matched?

Isotopes : Atoms with same atomic number but different atomic mass
Isobars : Atoms with same number of neutrons but different atomic number
Isotones : Atoms with same mass number but different atomic number
Select the correct answer using the code given below:
The octet rule is not valid for which one of the following molecules?
The rusting of an iron nail:
Which one of the following salts when dissolved in water makes the solution basic?
Which one is a sublime substance?
The process of change of liquid state into gaseous state at constant temperature is known as:
Which one among the following statements about atoms is not correct?
Which of the following is not a synthetic fibre?
The carbon bond length in benzene is:
The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with:
In electrophilic aromatic substitution reaction, the nitro group is meta directing because it: