UNICAL Chemistry 2015/2016 Past Questions

Practice each question, then open it to see the full details.

Allotropes of an element differ in their

A.chemical properties
B.mass number
C.electronic configuration
D.physical properties

The atom of an element X has two electron in its outermost shell. What is the formula of the compound when X combines with Aluminum?

A.AlX₂
B.Al₂X
C.Al₂X₂
D.Al₂X₃

Which of the following compound is readily soluble in water?

A.CuO
B.AgCl
C.Na₂SO₄
D.CaCO₃

Calculate the mass of ZnSO₄ produced when excess ZnCO₃ is added to 50.00cm³ of 4.00 H₂So₄. The equation for the reaction is: ZnCo₃ + H₂SO₄ → ZnSO₄ + CO₂ + H₂O [ZnSO₄ = 161g/mol]

A.0.200g
B.32.2g
C.1.29g
D.39.0g