List of top Chemistry Questions

Which from following is NOT an example of oil in water emulsion?
What is the term used for the minimum kinetic energy required for the reactant molecules to undergo reaction?
Half life of zero order reaction is 1 hour. If initial concentration of reactant is 2.0 mol \(\text{L}^{-1}\), find the time required to decrease concentration from 0.50 to 0.25 mol \(\text{L}^{-1}\)
Identify a nanomaterial having all three dimensions less than 100 nm?
If time required for 90 % completion of a first order reaction is '\(t\)'. What is the time required for 99.9 % completion of reaction at same temperature?
Which of the following concentrations of solutions of urea in water exhibits minimum freezing point depression?
The conductivity of 0.02 M of KCl solution at 298 K is 0.0123 \(\text{ohm}^{-1} \text{cm}^{-1}\). If the resistance of the cell containing this solution is 120 ohms, what is the value of the cell constant ?
Which of the following hot aqueous solutions is used to dip carbon rods of \(\text{H}_2-\text{O}_2\) fuel cell ?
Calculate the molar mass of nonvolatile solute when 4 g of it is dissolved in 100 g solvent that boils at 319.4 K [\(K_b\) = 2.4 K kg \(\text{mol}^{-1}\); B.P of pure solvent = 319 K]
Calculate van't Hoff factor for aqueous solution of 0.02 m formic acid if it freezes at -0.045 \(^{\circ}\text{C}\).
[ \(K_f\) = 1.86 K kg \(\text{mol}^{-1}\) and freezing point of water = \(0 ^{\circ}\text{C}\) ]
If the emf of cell, \(\text{Cu}_{(s)}|\text{Cu}_{(1M)}^{2+}|\text{Ag}_{(1M)}^+|\text{Ag}\) is 0.463 V at \(25 ^{\circ}\text{C}\) and standard potential of Cu electrode is 0.337 V. Find the standard potential of Ag electrode
Alkenes on oxidation with \(\text{KMnO}_4\) in dil \(\text{H}_2\text{SO}_4\) forms
When excess of chlorine is used in the chlorination of methane find the major product obtained.
Which from following elements is NOT present in mustard gas?
Calculate the number of unit cells in \(1\text{cm}^3\) of metal if it forms simple cubic structure with unit cell edge length 500 pm.
Find the volume occupied by a particle in a simple cubic unit cell if the radius of a particle in it is 190 pm.
Which from the following is NOT polymorphic form of silica ?
What is IUPAC name of following compound?
Which from following statements is NOT true about homologous series?
Which of the following reactions is NOT an example of redox reaction?
Which among the following is haloalkyne?
Which from following salts does not undergo hydrolysis ?
Which of the following equations is used to obtain enthalpy change of a reaction?
\(V_0\) and \(V_t\) are volumes of an ideal gas at \(0 ^{\circ}\text{C}\) and \(t ^{\circ}\text{C}\) respectively, find ratio \(\frac{V_t}{V_0}\)
At \(25 ^{\circ}\text{C}\) standard enthalpy of combustion of \(\text{H}_2\), Cyclohexene and cyclohexane are -241, -3800 and -3920 kJ \(\text{mol}^{-1}\) respectively. What is the heat of hydrogenation of cyclohexene?