Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 136:

• JAMB 2011

The constituents of baking powder that makes the dough to rise is

A. NaHCO₃
B. NaOH
C. Na₂CO₃
D. NaCl

Question 137:

• JAMB 2011

At 25^o and zymase as catalyst,
C₆H₁₂₆ → 2C₂H₅OH + 2CO₂ + energy
The reaction above represented by the equation above is useful in the production of

A. Propanol
B. Butanol
C. Methanol
D. Ethanol

Question 138:

• JAMB 2012

Commercial bleaching can be carried out using

A. Sulphur (IV) oxide and ammonia
B. Hydrogen sulphide and chlorine
C. Chlorine and sulphur (IV) oxide
D. Ammonia and chlorine

Question 139:

• JAMB 2012

Mineral acids are usually added to commercial hydrogen peroxide to

A. Oxidize it
B. Decompose it
C. Minimize its decomposition
D. Reduce it to water and oxygen

Question 140:

• JAMB 2012

The purest from of iron which contains only about 0.1% carbon is

A. Pig iron
B. Wrough iron
C. Cast iron
D. Iron pyrite