In the electrolytic extraction of aluminum; the function of the molten cryolite is to?
A. precipitate aluminium hydroxide B. lower the melting point of aluminium oxide C. act as raw materials D. act as a solvent Correct Answer: Option B = lower the melting point of aluminium oxide
The type of iron that is best suited for welding; making nails; chains and iron rods is?
A. pig iron B. wrought iron C. cast iron D. iron pyrites Correct Answer: Option B – wrought iron
Copper metal dissolves in concentrated trioxonitrate (V) acid with the resultant evolution of?
A. CO2 B. SO2 C. NO2 D. CO Correct Answer: Option C = NO2
Which of the following metals will show the highest metallic character?
A. Zinc B. Copper C. Barium D. Calcium Correct Answer: Option D – Calcium
Which of the following allotrope of carbon is a constituent of a lead pencil?
A. Graphite B. Diamond C. Lampblack D. Soot Correct Answer: Option A – GraphiteProducts
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