List of top Chemistry Questions

What is the oxidation number of sulfur in sulfuric acid (H$_2$SO$_4$)?
Which of the following has the maximum percentage of gas in the air?
Which of the following is the correct decreasing order of electronegativity?
"A given compound always contains the same proportion of elements" is a statement of
Which of the following pairs of compounds cannot demonstrate the law of multiple proportions?
Which of the following is most reactive towards nucleophilic substitution?
Which of the following compounds gives a secondary alcohol upon reaction with methylmagnesium bromide?
An aqueous solution of CuSO4 is electrolyzed using platinum electrodes.
Which of the following will be observed at the cathode?
Which of the following compounds will have the highest boiling point?
What is the standard electrode potential for the reduction half-reaction \( \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu} \)?
Which of the following is the correct order of increasing atomic size?
What is the ideal gas law equation?
Which of the following gases is most likely to deviate from ideal gas behavior at high pressures and low temperatures?
What is the pH of a 0.01 M solution of hydrochloric acid (HCl)?
Which of the following is an example of an alkene?
Which of the following compounds will exhibit hydrogen bonding?
The enthalpy of vaporization of water is 40.79 kJ/mol. How much heat is required to vaporize 2 moles of water at its boiling point?
In the electrolysis of molten NaCl using inert electrodes, what will be observed at the electrodes?
The rate constant of a first-order reaction is \( 2 \times 10^{-3} \, \text{s}^{-1} \). What is the half-life of the reaction?
What is the oxidation state of sulfur in \( \text{H}_2\text{SO}_4 \)?
What is the enthalpy change (\( \Delta H \)) for an exothermic reaction?
A solution is formed by mixing chloroform (CHCl3) and acetone (CH3COCH3).
Which of the following is true regarding the nature of this solution?
Which of the following compounds exhibits ionic bonding?
What is the molarity of a solution that contains 0.5 mol of NaCl in 250 mL of solution?
0.5 g of an organic compound gives 1.46 g CO\(_2\) and 0.9 g H\(_2\)O. Find the percentage composition of carbon.