List of top Chemistry Questions

Identify `A` in the following reaction:
\[ A \xrightarrow[\text{pyridine, reflux}]{\text{SOCl}_2} B \xrightarrow[\Delta]{\text{KCN (alcoholic)}} \text{Propane nitrile} \]
Identify the oxidising agent in the following reaction.
\[ CH_4(g) + 2O_2(g) \rightarrow CO_2(g) + 2H_2O(l) \]
Prolonged heating of glucose with HI to form n-Hexane confirms
The conductivity of NaI solution is \( 6.0 \times 10^{-4} \, \Omega^{-1} \text{cm}^{-1} \) and molar conductivity is \( 120 \, \Omega^{-1} \text{cm}^2 \text{mol}^{-1} \). Calculate the concentration of NaI solution.
When will the change in Gibb’s free energy always be negative?
Which of the following formulae is used to find edge length of bcc unit cell?
Total number of lone pairs of electron on oxygen atoms in carbon dioxide are
Heat of combustion of liquid benzene to carbon dioxide and water is \(-3266 \, \text{kJ/mol}\). What is the amount of heat liberated when 780 mg of benzene is fully oxidised? (At mass of C = 12, H = 1)
Which among the following polymers is a heteropolymer?
A balloon contains 2.27 L air and has a pressure of \(1.013 \times 10^5 \, \text{Nm}^{-2}\). The balloon rises to a certain height and expands to a volume of 4540 mL. What is the final pressure of air in the balloon?
Which among the following catalysts is used in manufacture of sulphuric acid by contact process?
What type of geometry and magnetic behaviour is found in compound [NiCl$_4$]$^{2-$? (Atomic no. Ni = 28)}
Identify the compound having highest boiling point from the following.
Which among the following elements has the highest ionisation enthalpy and bears a diagonal relationship with aluminium?
Identify compound 'A' in the following reaction.
What type of isomerism is present between
(I) [Cr(H$_2$O)$_6$]Cl$_3$ and
(II) [Cr(H$_2$O)$_5$Cl]Cl$_2 \cdot$ H$_2$O?
Which of the following reagents can bring about the following conversion?
But-1-ene $\xrightarrow{}$ Butan-2-ol
Which among the following polymers is used to obtain bulletproof vests and helmets?
Identify the correct statement from the following.
A first-order reaction is 50% completed in 16 minutes. The percentage of reactant that will react in 32 minutes is
Which among the following pairs of percentage of carbon and the property of cast iron is true?
Alkyl chloride when treated with sodium iodide in presence of dry acetone forms alkyl iodide. What is the name of this reaction?
Which of the following is an intensive property?
At constant temperature and pressure, when 8 volumes of dihydrogen gas react with 4 volumes of dioxygen, the mass of water vapor produced is
Which among the following is NOT paramagnetic in nature?