Neco Chemistry 2009 Past Questions and Answers

Question 31:

• NECO 2009

Which of the following non-metals reacts most readily with metals?

A. Carbon
B. Chlorine
C. Nitrogen
D. Phosphorus
E. Sulphur

Question 32:

• NECO 2009

The percentage composition of a hydrocarbon is 79.2 carbon 20.8 hydrogen. Calculate its empirical formula [H = 1, C = 12]

A. CH
B. CH₃
C. CH₄
D. C₂H₂
E. C₂H₆

Question 33:

• NECO 2009

The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT

A. HOCH₂ – CH₂OH
B. H₂C –C =C– CH₃
C. H₃C – HC = CH₂
D. H₂C = CH₂
E. H₃C – C =CH

Question 34:

• NECO 2009

The scientist who discovered the zig-zag movement of gas molecules is ____________

A. Brownian
B. Dalton
C. Gay Lussac
D. Graham
E. Newton

Question 35:

• NECO 2009

Which of the following is NOT a fraction of petroleum?

A. Bitumen
B. Coal
C. Diesel
D. Kerosene
E. Petrol