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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of chemical equation. - Science and Technology 1

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प्रश्न

When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of a chemical equation.

थोडक्यात उत्तर

उत्तर

  1. Copper is more reactive than silver. Therefore, copper displaces silver from its salt solution, silver nitrate. The glittering white deposit of silver metal is formed on the copper coin. Hence, when a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface after some time.
  2. The reaction is as follows:
    \[\ce{\underset{\text{Copper}}{Cu_{(s)}} + \underset{\text{nitrate}}{\underset{\text{Silver}}{2AgNO_{3(aq)}}} -> \underset{\text{nitrate}}{\underset{\text{Copper (II)}}{Cu(NO3)_{2(aq)}}} + \underset{\text{Silver}}{2Ag_{(s)}}}\]
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पाठ 8: Metallugy - Solve the following Questions

संबंधित प्रश्‍न

Fill in the blanks:

Metals react with acids to produce _________ gas.


Mark ‘T’ if the statement is true and ‘F’ if it is false.

Generally, non-metals react with acids. ( )


Give reasons for the following.

Sodium and potassium are stored in kerosene.


Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.

(a) How will she find the nature of the gas?

(b) Write down word equations of all the reactions taking place in this process.


What is an amalgam?


Fill in the following blank with suitable word:

Brass is an alloy of copper and .........


What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.


Fill in the blank 

_______ is a soft metal. 


Statements given below are incorrect. Write the correct statements : 

Zinc is used for making power transmission wires.  


Name a metal which is best conductor of electricity :  


Write name.

The oxide that forms salt and water by reacting with both acid and base.


Write scientific reason.

Sodium is always kept in kerosene.


What is it made from? Why?

Electric cables


With reference to the following metals state their use in daily life metal:

copper


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.


A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.


Which of the following two combinations are correct?

 

  Metal Gas Evolved
(i) Copper Yes
(ii) Iron Yes
(iii) Magnesium No
(iv) Zinc Yes

Which of the following is not a metal?


Which of the following metals can displace the other two metals from their salt solutions? 

Zinc iron copper

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