Chemistry 2009 Neco Past Questions and Answers

Question 6 :

• NECO 2009

How many zones are present in a luminous Bunsen burner flame?

A. 2
B. 3
C. 4
D. 5
E. 6

Question 7 :

• NECO 2009

What mass of copper in gram would be deposited by a current of 1.00ampere passing for 965 seconds through copper(II) tertraoxosulphate (VI) solution? [Cu 63.5; If = 96500c]

A. 0.32
B. 0.64
C. 3.18
D. 6.35
E. 9.65

Question 8 :

• NECO 2009

Which of the following metals is NOT extracted by electrolysis?

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

Question 9 :

• NECO 2009

The furring of kettles and boilers are caused by ____________

A. Calcium hydroxide
B. Calcium hydrogen trioxocarbonate (IV)
C. Calcium trioxocarbonate (IV)
D. Calcium tetraoxocarbonate
E. Magnesium tetraoxocarbonate (VI)

Question 10 :

• NECO 2009

Two elements X and Y with electronic configurations 2,8,2 and 2,8,7 respectively, are likely to combine by ____________ bonding

A. Covalent
B. Dative
C. Electrovalent
D. Hydrogen
E. Metallic