Post Utme Chemistry Past Questions and Answers

Question 1156:

Which of the following alkanols will not undergo oxidation reaction by acidified \(K _{2} Cr _{2} O _{7}\) ?

A. \(CH _{3} CH _{2} CH ( OH )\) \(CH _{3}\)
B. \(CH _{3} CH _{2} CH _{2} CH _{2} OH\)
C. \(CH _{3} CH _{2} CH _{2} C \left( CH _{3}\right)( OH )\) \(CH _{3} \)
D. None of the above

Question 1157:

The electronic configuration of the specie underlined as in the molecule \(H _{2} S\) is ____________

A. \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{104} s^{2} 4 p^{4}\)
B. \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{4}\)
C. \(1 s ^{2} 2 s ^{2} 2 p ^{6} 3 s ^{2} 3 p ^{2}\)
D. \(1 s ^{2} 2 s ^{2} 2 p ^{6} 3 s ^{2} 3 p ^{6}\)

Question 1158:

The functional group(s) of an amino acid is/are ____________

A. \(NH _{2}\), \(- COOH\)
B. \(C _{ n } H _{2 n +1},- COOH \)
C. \(- COCl , COOH\)
D. \(COOH , CONH _{2}\)

Question 1159:

A student while trying to identify two gases labeled \(A\) and \(B\), found that gas A is acidic to litmus paper and turn acidified potassium dichromate solution green, while gas B turns red litmus paper blue and forms dense white fume with hydrogen chloride. The correct identity of \(A\) and \(B\) respectively are ____________

A. \(CO _{2}\) and \(N _{2}\)
B. \(SO _{2}\) and \(NH _{3}\)
C. \(HCl\) and \(NH _{3}\)
D. \(NO _{2}\) and \(PCl _{5}\)

Question 1160:

Which of the following titrations will have a solution with 2 a \(pH\) greater than 7 at the end point (equivalent point) of the titration?

A. Titration of sodium hydroxide with tetraoxosulphate(VI) acid
B. Titration of sodium trioxocarbonate(IV) with hydrochloric acid
C. Titration of sodium hydroxide with oxalic acid (ethanedioic acid)
D. Titration of ammonium hydroxide and trioxonitrate(V) acid