Waec Chemistry Past Questions For Year 1996
Question 1
The existance of two or more forms of the same element in the same physical state is known as
- A. allotropy
- B. resonance
- C. hybridization
- D. isotopy
- E. isomerism
Question 2
What volume of carbon (lV) oxide is produced at s.t.p. when 2.5g of CaCO3 reacts with excess acid according to the following equation? CaCO3 + 2HCI → CaCI2 +H2O + CO2 [CaCO3 = 100; molar volume of a gas at s.t.p = 22.4dm3]
- A. 11.20dm3
- B. 5.60dm3
- C. 2.24dm3
- D. 0.56dm3
- E. 0.28dm3
Question 3
''Equal volumes of all gases at the same temperature and pressure contain the same number of molecules'' is an expression of
- A. Charles Law
- B. Boyle's Law
- C. Avogadro's Law
- D. Graham's Law
- E. Gay Lussac's Law
Question 4
What is the likely formula of compound formed between element M in group two and element X in group seven?
- A. M7X2
- B. M2X
- C. M2X7
- D. MX2
- E. MX6
Question 5
The alkali metals exhibit similar chemical properties because
- A. they occur in the combined state
- B. they have the same number of vallence electrons
- C. they form crystalline salts
- D. their salts are soluble in water
- E. they are highly reactive
