List of top Chemistry Questions

Which among the following oxoacids of chlorine exhibits \(+3\) oxidation state of chlorine?
Which of the following properties of colloid is used to measure the rate of migration of sol particles?
Which of the following is an elementary reaction ?
A first order reaction take \(30\) minutes for \(75\%\) decomposition, calculate its rate constant ?
During the electrolysis of aqueous NaCl the product formed at cathode is?
What is the conductivity of \(0.02 \text{M} \text{AgNO}_3\) solution having cell constant \(1.2 \text{cm}^{-1}\) and resistance \(95.0 \text{ohms}\) ?
Which among the following pairs of solutions is isotonic in nature?
van't Hoff factor for \(\text{BaCl}_2\) is \(2.47\), calculate the percentage dissociation of in its aqueous solution.
A solution of non volatile solute has boiling point elevation \(0.70\) K if \(K_b\) for the solvent is \(2.44 \text{K kg mol}^{-1}\). What is the molality of the solution?
What is number of moles of electron passed when a current of \(2\) Amp flows through solution of electrolyte for \(10\) minutes?
What is the number of tetrahedral voids present in \(0.5\) mole of compound forming hcp structure?
Which from the following aldehydes contains two \(-\text{CHO}\) groups in a molecule?
Which from following is a primary benzylic alcohol?
Identify the aldehyde from following so that the aldehydic group is NOT attached with any \(sp^3\) hybrid 'c' atom.
Gold crystallizes as fcc unit cell, the edge length of unit cell is \(408\) pm. What is the radius of gold atom?
Which element from following forms superoxide with oxygen?
A weak base is \(1.3\%\) dissociated in its aqueous solution. If \(K_b\) for weak base is \(1.69\times 10^{-5}\) at \(298\) K. Find the concentration of aqueous solution of weak base.
Identify change in oxidation state of oxidising agent in following redox reaction.
\(3\text{H}_3\text{AsO}_{3(aq)}+\text{BrO}_{3(aq)}^-⟶\text{Br}_{(aq)}^-+3\text{H}_3\text{AsO}_{4(aq)}\)
What is the number of chiral carbon atoms in 2-chlorobutane?
What is the pH of solution containing \(5\times 10^{-4} \text{M} \text{H}^+\) ion?
An ideal gas expands from initial volume \(5 \text{dm}^3\) to \(15 \text{dm}^3\) against a constant external pressure of \(2\) atm. What is the work done by the gas ?
Which of the following is not an illustration of viscosity?
A gas absorbs \(120\) J of heat and expands by \(300\times 10^{-6} \text{m}^3\) against a constant external pressure of \(2\times 10^5 \text{Nm}^{-2}\). What will be the change in internal energy of the system ?
Identify correct order for repulsion between electron pair present in valence shell of central atom of molecule?
What is the number of \(sp^3\) hybrid carbon atoms in \(\text{HO}(\text{CH}_2)_2\text{CH}(\text{CH}_3)_2\)?