List of top Chemistry Questions

Aryl fluorides are prepared from diazonium salts using
Phenol is converted into benzene by heating with
Benzaldehyde reacts with acetophenone in the presence of \(NaOH\) at 293 K to give benzalacetophenone. This reaction is an example of
Aspirin is
Which of the following carboxylic acid is used in rubber, textile, dyeing, leather and electroplating industries?
Which of the following is the weakest acid?
Intramolecular hydrogen bonding is present in
The correct decreasing order of acidity of alkynes is
One mole of an alkene on ozonolysis gives one mole of propan-2-one and one mole of formaldehyde. What is the alkene?
When toluene is treated with \(Cl_2\) in the presence of \(Fe\) in dark, the product formed is
When aryl halide is treated with \(Na\) in dry ether, biphenyl is formed. This reaction is called
Which of the following compound is used for the manufacture of phenol in large scale?
The metal ion present in the Wilkinson’s catalyst is
The hydrocarbon with molecular formula $C_{20}H_{42}$
Which of the following is a spin free complex?
The type of hybridization of the carbon atoms from left to right in \(CH_3 - CH = CH - CN\) is
When n-hexane is passing over $Mo_2O_3$ catalyst at 773 K and 10–20 atm pressure, the product formed is
The lanthanoid with the outer electronic configuration \(4f^7 5d^1 6s^2\) is
\(KMnO_4\) is prepared from Mn(II) ion salts by oxidizing it with
The complexes \([Co(NH_3)_5Br]SO_4\) and \([Co(NH_3)_5SO_4]Br\) are examples of
The transition metal ion with the least ionic radius (in pm) is
The IUPAC name of the complex \([Co(NH_3)_3(H_2O)_3]Cl_3\) is
The \(3d\) metal that forms fluoride in +6 oxidation state is
The transition metal oxide used as a catalyst in the manufacture of sulphuric acid is
Which of the following is a colourless transition metal ion?