43
The ability of carbon to form long chains is referred to as
- A. Alkylation
- B. Acylation
- C. Carbonation
- D. Catenation
44
Ammonium chloride can be separated from its mixture with common salt by
- A. Distillation
- B. Evaporation
- C. Decantation
- D. Sublimation
45
The principle of column chromatography is based on th ability of the constituents to
- A. React with the solvent in the column
- B. React with each other in the solvent in the column
- C. Dissolve in each other in the column
- D. Move at different speeds in the column
46
The monomer of nylon is
- A. Hydroxybenzene
- B. Hexanedioic acid
- C. Benzene -1,-4-dicarboxylic acid
- D. Ethane-1,2-diol
47
In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassuim tetraoxomanganate(VII) the produced is dried by passing it through
- A. Concentrated tetraoxosulphate (VI) acid
- B. Anhydrous calcium chloride
- C. Calcium oxide
- D. Sodium hydroxide
48
The enzyme used in the hydrolysis of starch to dextrin and maltose is
- A. Zymase
- B. Sucrase
- C. Amylase
- D. Lactase
49
The condition required for corrosion to take place is the presence of
- A. Oxygen and Carbon (IV) oxide
- B. Water and Oxygen
- C. Water and Carbon (IV) oxide and Oxygen
- D. Water and Carbon (IV) oxide
50
In an electrochemical cell, polarization is caused by
- A. Oxygen
- B. Hydrogen
- C. Tetraoxosulphate(IV) acid
- D. Chlorine