Post Utme Chemistry Past Questions and Answers

Question 856:

Laughing gas is ____________

A. Nitrogen (II) oxide
B. Nitrogen (I) oxide
C. Nitrogen (III) oxide
D. Nitrogen (V) oxide
E. Ammonia

Question 857:

The correct name of the compound \(CH _{3} CH _{2} CONH _{3}\) is ____________

A. N-methyl-propionyl amide
B. Propionyl amide
C. Methyl propanamide
D. Methyl propionylamide
E. Propionylmethamide

Question 858:

The name pentanone is not specific and proper because it can refer to ____________

A. 2-pentanone and 3-pentanone
B. 1pentanone and 5-pentanone
C. Methyl propanone and propyl methanone
D. Methyl propanonne and methyl propyl butanone

Question 859:

The oxide that remains unchanged when heated with hydrogen is ____________

A. CuO
B. \(Fe _{2} O _{3}\)
C. \(PoO 2\)
D. \(ZnOE \cdot Ag _{2} O\)

Question 860:

What is the most metallic element in the set ____________

A. Na
B. Ar
C. P
D. A
E. Mg