Neco Chemistry Past Questions and Answers

Question 81:

• NECO 2008

pH is define as ____________

A. [H+]
B. –log [H]
C. –log [H+]
D. Log [H]
E. Log [H+]

Question 82:

• NECO 2008

Matter is neither created nor destroyed in the course of any chemical reactions is a statement of the law of ____________

A. Combining volumes
B. Conservation of mass
C. Definite proportion
D. Multiple proportion
E. Reciprocal proportion.

Question 83:

• NECO 2008

Bauxite is the ore of ____________

A. Aluminium
B. Calcium
C. Iron
D. Sodium
E. Magnesium

Question 84:

• NECO 2008

An element Z has a combining power of 3. Which of the following formulae is correct of its compound?

A. ZS₃
B. ZSO₃
C. ZS0₄
D. Z0₃
E. Z₃Cl₂

Question 85:

• NECO 2008

The following acids are monobasic EXCEPT

A. Dioxonitrate (Ill) acid
B. Ethanedioic acid
C. Hydrobromic acid
D. Methanoic acid
E. Oxochlorate (I) acid