Post Utme Chemistry Past Questions and Answers

Question 1126:

Which of the following is an acid salt?

A. \(NaHSO _{4} \)
B. \(Na _{2} SO _{4}\)
C. \(CH _{3} CO _{3} Na\)
D. \(Na _{2} S _{2}\)
E. \(C _{2} H _{5}\)

Question 1127:

Which of the following physical properties decreases across the periodic table ____________

A. Ionization potential
B. Electron affinity
C. Electron negativity
D. Atomic radius
E. Electro-positive reaction

Question 1128:

Silver trioxonitrate (V) on heating, gives ____________

A. Ag, \(N _{2} O\) and \(O _{2}\)
B. \(Ag _{2} O , N _{2}\) and \(O _{2}\)
C. \(Ag , O\) and \(N , O\)
D. \(Ag , NO _{2}\) and \(O _{2}\)

Question 1129:

The most reactive halogen is ____________

A. \(Cl _{2}\)
B. \(Br _{2}\)
C. \( F _{2}\)
D. \(1_{2}\)

Question 1130:

\(0.79 g\) of a gas at s.t.p. occupied a volume of \(250 cm ^{3}\). What is the relative molecular mass of the gas?
(G.M.V. at s.t.p. \(=22.4 dm ^{-3}\) )

A. 17
B. 32
C. 64
D. 71