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Question
Explain the following term:
Ore
Solution
Ores are those minerals from which metals are extracted commercially at a comparatively lower cost and with minimum effort.
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RELATED QUESTIONS
Name the most common ore of the metal aluminium from which the metal is extracted. Write the chemical formula of the ore.
Give the name and formula of the main orea of iron and zinc ?
State a reason why zinc is used in:
dry cells
Explain
A neutral gas other than oxygen which is formed at the anode during electrolysis of fused alumina
From the metals: copper, iron, magnesium, sodium, and zinc, select a different metal in the case which does not react with dilute hydrochloric acid.
Name the following:
The chief metal present in magnalium and duralumin
Name one metal occurring as a : Sulphide ore
Name a metal which occurs free in nature.
From the metals copper, iron, magnesium, sodium and zinc, select a different metal in each case which:
(a) Does not react with dilute hydrochloric acid
(b) Can form 2+ and 3+ ions
(c) Has a hydroxide that reacts with both acid and alkalis.
(d) Does not react with cold water, but reacts with steam when heated.
List 1 contains the meta ls I alloys (1, 2, 3, 4, 5 ) and list 2 contains their uses (A, B, C, D, E).
| List 1 Metal/Alloy |
List 2 Uses |
| 1. Aluminium | A. Steel making |
| 2. Lead | B. aeroplane wings |
| 3. Brass | C. galvanizing |
| 4. Iron | D. radiation shield |
| 5. Zinc | E. electricaI fittings |
Copy and complete the following table, write down the correct letter against the numbers representing metals. An answer may be used only once. The first has been done for you.
| Metal | 1 | 2 | 3 | 4 | 5 |
| Use | B |
