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प्रश्न
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
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उत्तर
- Two metals that react with water: Potassium, sodium
- Two moderately reactive metals: Zinc, iron
- 1. Most highly reactive metal: Potassium
2. Most less reactive metal: Gold
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संबंधित प्रश्न
Name the gas in air which tarnishes silver articles slowly.
Name one metal which is extracted by:
Electrolytic reduction.
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Name the gas produced when calamine ore is calcined.
Name the gas evolved when cinnabar ore is roasted.
Which of the following metals can be obtained from haematite ore?
The metal which can be extracted from pyrolusite ore is ______.
A black metal oxide XO2 is used as a catalyst in the preparation of oxygen gas from potassium chlorate. The oxide XO2 is also used in ordinary dry cells. The metal oxide XO2 cannot be reduced satisfactorily with carbon to form metal X.
- Name the metal X.
- Name the metal oxide XO2.
- Which reducing agent can be used to reduce XO2 to obtain metal X?
- Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.
How an ore is concentrated by froth floatation process?
What is passive iron?
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
State three objectives achieved during the roasting of ores.
Froth floatation process is generally used to concentrate ______ ores.
Name the process used for the enrichment of sulphide ore.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
In electrolytic reduction of alumina _______ is used as a cathode.
_______ is the least reactive metal.
