हिंदी

Zinc sulphate forms a colourless solution in water. Will you observe any colour on adding copper turning in it?

Advertisements
Advertisements

प्रश्न

Zinc sulphate forms a colourless solution in water. Will you observe any colour on adding copper turning in it?

लघु उत्तरीय
Advertisements

उत्तर

There is no colour change on adding copper turning in zinc sulphate solution because copper is less reactive than zinc and it cannot displace zinc from its salt solution. So, displacement reaction does not take place.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Materials : Metals and Non-Metals - Very Short Answer Questions [पृष्ठ १९]

APPEARS IN

एनसीईआरटी एक्झांप्लर Science [English] Class 8
अध्याय 4 Materials : Metals and Non-Metals
Very Short Answer Questions | Q 18. | पृष्ठ १९

संबंधित प्रश्न

Give two examples of amphoteric oxides.


Name two metals which will displace hydrogen from dilute acids, and two metals which will not.


Stainless steel is very useful material for our life. In stainless steel, iron is mixed with


If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of


When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z which easily catches fire. Identify X, Y and Z and also write the reaction involved.


Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?


The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is ______.


Answer the questions based on the figure below:

  1. Which reaction is shown in the figure?
  2. Which gas is evolved in the reaction?
  3. Give an example of reactants that rapidly show this reaction. Give equations.
  4. Give an example of reactants that do not react rapidly.
  5. In what condition will reactants of (c) part react? Give equation.

Keerti added dilute Hydrochloric acid to four metals and recorded her observations as shown in the table given below:

Metal Gas Evolved
Copper Yes
Iron Yes
Magnesium No
Zinc Yes

Select the correct observation(s) and give chemical equation(s) of the reaction involved.


Metal oxides generally react with acids, but few oxides of metal also react with bases. Such metallic oxides are:

  1. MgO
  2. ZnO
  3. Al2O3 
  4. Cao

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×