ABU Chemistry 2010/2011 Past Questions

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

If the rate law obtained for a given reaction is given as rate = K[X]ⁿ[Y]^m, what is the overall order of the reaction.

A.nm
B.n/m
C.n + m
D.n - m

A molecular formula shows ...... in a molecule.

A.the elements present
B.the number of atoms of each elements
C.cations and anions
D.chemical symbols and number of atoms

¹¹⁴₅₅C₅ ← ^A_ZE + ⁴₂α, Find the value of A and Z in the equation above

A.119.53
B.110.57
C.110.53
D.110.58

How many moles of H₂ molecules are needed to convert 5mole of O₂ molecules to water?

A.5 mole H₂
B.10 mole H₂
C.15 mole H₂
D.20 mole H₂

²²⁵₆₆Ra ← ^x₆₆Rn + α. What is the value of X in the nuclear reaction above?

A.220
B.222
C.226
D.227

When naphthalene on heating changes from solid state directly to the gaseous state, it undergoes

A.sublimation
B.evaporation
C.combustion
D.decomposition

Which of the following is an electrolyte?

A.alcohol
B.sodium ethanoate
C.solid potassium hydroxide
D.mercury

The equation sup>14₇N ← ⁴₂He + ¹⁷₈O + ¹₁P represents

A.nuclear fusion
B.nuclear fission
C.artificial radioactivity
D.nuclear fission using positron

Which of the following is a general method of preparing acids?

A.direct combination of constituent elements
B.Double decomposition involving a salt solution
C.reaction between an anhydride and water
D.reaction between a base and an amphoteric oxide
E.decomposition of hydroxide followed by neutralization