Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
more heat is absorbed in (l)
more heat is absorbed in (ll)
less heat is evolved in (l)
reaction (ll) proceeds faster than (l)
reaction (l) proceeds faster than (ll)
Correct answer is C
No explanation has been provided for this answer.
All the solutions are acidic
All the solutions are basic
Y and Z are more acidic than water
Y is more acidic than X
Z is the least acidic
Correct answer is E
No explanation has been provided for this answer.
An element is electronegative if
it has a tendency to exist in the gaseous from
its ions dissolve readily in water
it has a tendency to lose electrons
it has a tendency to gain electrons
it readily froms covalent bonds
Correct answer is D
No explanation has been provided for this answer.
heating the affected parts in order to boil off the petroleum
mechanically stirring to dissolve the petroleum in water
pouring organic solvents to dissolve the petroleum
spraying the water with stergents
cooling to freeze out the petroleum
Correct answer is C
No explanation has been provided for this answer.
Which of the following happens during the electrolysis of molten sodium chloride?
Sodium ion loses an electron
Chlorine atom gains an electron
Chlorine ion gains an electron
Sodium ion is oxidized
Chloride ion is oxidized
Correct answer is E
No explanation has been provided for this answer.