हिंदी

Observe the given figure of reactivity series of metals and answer the following questions:

Advertisements
Advertisements

प्रश्न

Observe the given figure of reactivity series of metals and answer the following questions:


                    Reactivity series of metals

  1. Name two metals which react with water.
  2. Name two moderately reactive metals.
  3. Name the most highly reactive metal and the most less reactive metal.
टिप्पणी लिखिए
Advertisements

उत्तर

  1. Two metals that react with water: Potassium, sodium
  2. Two moderately reactive metals: Zinc, iron
  3. 1. Most highly reactive metal: Potassium
    2. Most less reactive metal: Gold
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Metallugy - Answer the Following [पृष्ठ ४२]

संबंधित प्रश्न

What chemical process is used for obtaining a metal from its oxide?


In the extraction of aluminium: Why is it necessary to replace anodes time to time?


Name the most abundant metal in the earth’s crust.


Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.


Define the term mineral.


Name one ore of copper (other than cuprite). Which compound of copper is present in this ore? Also, write its chemical formula.


Which metal is extracted from calamine ore?


The metal which can be extracted simply by heating the cinnabar ore in air is ______.


Rock salt is an ore of one of the following metals. This metal is:


Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________


Find the odd one out and give its explanation.


Explain the characteristics of ionic compounds.


Explain the following reaction with the balanced equation.

Sodium aluminate reacts with water


Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper, etc. are reduced by using:


Which of the following metals exist in their native state in nature?

(i) Cu

(ii) Au

(iii) Zn

(iv) Ag


Which of the following metals exist in their native state in nature?

  1. Cu
  2. Au
  3. Zn
  4. Ag

During extraction of metals, electolytic refining is used to obtain pure metals.
(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
(c) In this electrolytic cell, where do we get pure silver after passing electric current?


Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?


Assertion (A): The extraction of metals from their sulphide ores cannot take place without roasting the ore.

Reason (R): Roasting converts sulphide ores directly into metals.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×