List of top Chemistry Questions

What is the EAN of [Co(NH3)6]3+?
In which of the following options, the IUPAC name is not correctly matched with the structure of the compound?
In the reaction: \[ NH_2CONH_2 + 2H_2O \rightarrow [X] \rightleftharpoons 2NH_3 + H_2O + [Y] \] The hybridization of carbon in \( X \) and \( Y \) respectively are:
Which of the following is correct statement?
At \( T(K) \), three moles of an ideal gas is present in a 10 L vessel. If the kinetic energy of an ideal gas is \( 3000 \) J mol\(^{-1}\), the approximate pressure of the gas (in atm) is:
The drug which is obtained from opium poppy and its use are respectively:
Two statements are given below: I. Sodium hexametaphosphate is used in calgon method for removal of permanent hardness of water II. Lithium forms interstitial hydrides Identify the correct answer
The heights of the transmitting and receiving antennas are 33.8 m and 64.8 m respectively. The maximum distance between the antennas for satisfactory communication in line of sight mode is:
(Radius of the earth = 6400 km)
Which one of the following corresponds to the wavelength of line spectrum of H atom in its Balmer series? (R = Rydberg constant)

Match the following: 

Identify 'Z' in the following sequence of reactions:
nucleophilic substitution
The standard enthalpy of formation (\(\Delta H_f^\circ\)) of ammonia is -46.2 kJ/mol. What is the \(\Delta H_f^\circ\) of the following reaction? \[ N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \]
The number of benzenoid and non-benzenoid aromatic species present in the following list are respectively Naphthalene, Toluene, Cycloheptatrienyl cation, Anthracene
The vitamin that can be stored in the body and whose deficiency results in disease is:

Reaction of conversion of Y to Z in the given reaction corresponds to: 

In Haber’s process of manufacture of ammonia, the ‘catalyst’, the ‘promoter’, and‘ poison for the catalyst’ are respectively:

An alcohol X (C\(_5\)H\(_{12}\)O) when reacted with conc. HCl and anhydrous ZnCl\(_2\), produces turbidity instantly. The alcohol X can be prepared from which of the following reactions?
The electron gain enthalpy (in kJ/mol) of oxygen, sulphur, selenium respectively are
Identify the reaction in which hydrogen gas is not liberated
What is the correct equation that relates kinetic energy (\(E_{\text{ke}}\)) and pressure (\(P\)) of one mole of an ideal gas? - (V = Volume)
Methemoglobinemia is due to:
Identify the correct statements from the following:
I. The order of reaction is determined from experiment only
II.The order of reaction can be zero , positive integer or a fraction
III.In a multistep reaction, the slow step determines the rate
In which of the following, ions are correctly arranged in the increasing order of oxidizing power?

Identify the correct statements:

  • (i) LiF has more covalent character compared to KF.
  • (ii) Dipole moment of NF3 is greater than that of NH3.
  • (iii) The bond order is same for F2 and O2.
  • (iv) Ionic compounds possess low melting and boiling points.
Which of the following when subjected to thermal decomposition will liberate dinitrogen? (i) sodium nitrate (ii) ammonium dichromate (iii) barium azide