Post Utme Chemistry Past Questions and Answers

Question 1021:

The mass of silver deposited when a current of \(10 A\) is passed through, a silver salt solution for \(4830 s\) is ____________
\(( Ag =\) \(108, F=96500 Cmol ^{-1}\) ).

A. \(54 g\)
B. \(108 g\)
C. \(27 g\)
D. \(13.5 g\)

Question 1022:

When an atom gains an electron, it becomes ____________

A. A cation
B. Oxidized
C. Negatively charged
D. Chemically inactive

Question 1023:

What volume of \(CO _{2}\) is produced at stp when \(5.0 g\) of \(CaCO _{3}\) reacts with excess \(HCl\) ?

A. \(0.56 dm ^{3}\)
B. \(1.12 dm ^{3}\)
C. \(2.24 dm ^{3}\)
D. \(11.2 dm ^{3}\)

Question 1024:

Amphoteric oxides are oxides which ____________

A. Contain high proportion of oxygen
B. React with water to form alkali
C. React with water to form acids
D. React with acids and alkalis

Question 1025:

If the third member of homologous series is \(C _{3} H _{8}\), the seventh member is ____________

A. \(C _{7} H _{12}\)
B. \(C _{7} H _{14}\)
C. \(C _{7} H _{16}\)
D. \(C _{7} H _{10}\)