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प्रश्न
Name the following:
The rocky impurities present in an ore.
उत्तर
Gangue
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संबंधित प्रश्न
Give the name and formula of the main orea of iron and zinc ?
Why ‘the food containing iron salts’ should not be cooked in aluminium utensils?
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 kind of welding in which aluminium powder is used.
Write the name and formula of two ores of the following: Zinc
Complete and balance the following equation:
Al + KOH + H2O →
Arrange the metals:
calcium, iron, magnesium and sodium in order of their reactivity with water placing the most reactive first.
What is added to steel to make it stainless steel?
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 |
Write the equation for the reaction of zinc of the following: Copper sulphate solution
