Neco Chemistry Past Questions and Answers

Question 31:

• NECO 2001

Which metal will dissolve in aqueous sodium hydroxide?

A. Aluminium
B. Copper
C. Iron
D. Sikeer
E. Tin

Question 32:

• NECO 2001

in any chemical reaction, the total mass of products is always equal to that of the reactants.

This Is statement of the law of:

A. Conservation of matter.
B. Constant composition
C. Definite proportions.
D. Multiple proportions.
E. Reciprocal proportions.

Question 33:

• NECO 2001

The alloy used for welding and plumbing contains ____________

A. Aluminum and copper.
B. Copper and tin
C. Iron and aluminum.
D. Lead and antimony.
E. Lead and tin.

Question 34:

• NECO 2001

Which compound is a product of the hydrolysis of the of CH₃COOC₃H₇ with aqueous sodium hydroxide?

A. CH₃COOH
B. CH₃COONaCCH₃OH
C. CH₃OH
D. C₂H₅OH
E. C₃H₇COONa

Question 35:

• NECO 2001

On exposure to hydrogen sulphide, moist lead (II) ethanoate paper turns ____________

A. Black
B. Blue
C. Green
D. White
E. Yellow