Welcome to OPA Chemistry Sample Quiz
In the short period melting points and boiling points of elements:
Which of the following elements has lower 1st ionization energy?
In which of the following pairs, the radius of the second atom is greater than that of the first atom?
Which of the following is the correct order of increasing ionization energies of elements?
Which of the following compounds exhibit geometrical isomerism?
All of the following show functional group isomerism EXCEPT:
Among the following compounds that can be most readily nitrated is:
Which one is antiaromatic?
Which of the following alcohols would have the lowest boiling point?
When excess ethanol is heated at 140℃ in the presence of conc. H2SO4 acid, the product obtained is:
