मराठी
सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Write ‘True’ Or ‘False’ for the Following Statement : Silver is Used to Make Electric Cables .

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प्रश्न

Write ‘true’ or ‘false’ for the following statement : 

Silver is used to make electric cables.

पर्याय

  • True

  • False

MCQ
चूक किंवा बरोबर
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उत्तर

False

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पाठ 6: Metals and Non-metals - Objective type questions

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एस.पी. सिंह Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Objective type questions | Q 3.1

संबंधित प्रश्‍न

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

Sodium is a very reactive metal. ( )


A metal having low melting point is ______ but a non-metal having very high melting point is ______.


What is an amalgam?


Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.


For the reduction of a metal oxide, suggest a reducing agent other than carbon.


Give reasons 

Gold is mixed with copper and nickel.  


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 :  


State two important uses of following metal: 

Uses of zinc  


Write scientific reason.

Sodium is always kept in kerosene.


The electronic configuration of metal ‘A’ is 2,8,1 and that of metal ‘B’ is 2,8,2. Which of the two metals is more reactive? Write their reaction with dilute hydrochloric acid.


Give reasons for the following:
Most metals conduct electricity well.


What is it made from? Why?

Ornaments


Match the columns.

Group A Group B
1) Copper and Zinc a) Brass
2) Copper and Tin b) Bronze
  c) Stainless steel

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.


Why do metals appear shiny?


Which metals are liquid at room temperature?


Why are metalloids called semimetals?


Compare the conductivity of metals and non–metals.


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