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.
Which of the following statements about an exothermic reaction is correct?
the products have less heat content than reactants
the system absorbs heat from the surrounding
the activation energy is high
the enthalpy change is positive
Correct answer is A
No explanation has been provided for this answer.
Sea shells contain mainly CaCO 3. Calcium oxide can be prepared from sea shells by
adding dilute acid
heating at a high temperature
reduction with CO
adding dilute NaOH(aq)
Correct answer is B
No explanation has been provided for this answer.
Which of the following processes involves neutralization?
Hardening of oils
Souring of milk
Charring of sugar
Liming of soil
Correct answer is D
No explanation has been provided for this answer.
the pH value was equal to 5 in each case
the pH values of the HCI and H2SO4 solutions were equal
their pH values added uo to 14
the pH value of the CH3COOH was the highest
Correct answer is D
No explanation has been provided for this answer.
What term is used to describe an oxide whose aqueous solution turns blue litmus red?
Strong electrolyte
Acid anhydride
Amphoteric oxide
Basic oxide
Correct answer is B
No explanation has been provided for this answer.