Advertisements
Advertisements
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.
Advertisements
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
APPEARS IN
संबंधित प्रश्न
What chemical process is used for obtaining a metal from its oxide?
Explain why, carbon cannot reduce oxides of sodium or magnesium.
Fill in the following blank with suitable word:
The non-metal present in steel is ............
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
Name the method by which aluminium metal is extracted.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
Calamine ore can be used to extract one of the following metals. This metal is:
(a) copper
(b) mercury
(c) aluminium
(d) zinc
Which of the following metals are extracted by the electrolysis of their molten chlorides?
(a) Na and Hg
(b) Hg and Mg
(c) Na and Mg
(d) Cu and Fe
Give reasons, why aluminum is used in:
In making ships
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Which method of refining is used to get 99.8% pure aluminium?
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
Name : The metal which is liquid at room temperature.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
Define calcination.
_______ is the least reactive metal.
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
In extraction of copper, the flux used is ____________.
