Jamb Chemistry 2010 Past Questions and Answers

Question 31:

• JAMB 2010

To a solution of an unknown compound, a little dilute tetraoxosulphate (VI) acid was added with some freshly prepared iron (II) tetraoxosulphate (VI) solution. The brown ring observed after the addition of a stream of concentrated tetraoxosulphate (VI) acid confirmed the presence of

A. CO^-
B. Cl^-
C. SO^-
D. NO

Question 32:

• JAMB 2010

Which of the following is used in rocket fuels?

A. HNO₃
B. CH₃COOH
C. H₂SO₄
D. HCl

Question 33:

• JAMB 2010

A constituent common to bronze and solder is

A. Lead
B. Silver
C. Copper
D. Tin

Question 34:

• JAMB 2010

When iron is exposed to moist air, it gradually rusts. This is due to the formation of

A. Hydrate iron (III) oxide
B. Anhydrous iron (III) oxide
C. Anhydrous iron (II) oxide
D. Hydrate iron (II) oxide

Question 35:

• JAMB 2010

A compound gives an orange-red colour to non-luminous flame. This compound is likely to contain

A. Na⁺
B. Ca²⁺
C. Fe³⁺
D. Fe²⁺