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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Statements Given Below Are Incorrect. Write the Correct Statements : Bronze is a Mixture of 10% Copper, 80% Zinc and 10% Tin.

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प्रश्न

Statements given below are incorrect. Write the correct statements : 

Bronze is a mixture of 10% copper, 80% zinc and 10% tin.  

एका वाक्यात उत्तर
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उत्तर

Bronze is a mixture of 80% copper, 10% zinc and 10% tin.

 
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पाठ 6: Metals and Non-metals - Additional questions 1

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एस.पी. सिंह Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Additional questions 1 | Q 2.2

संबंधित प्रश्‍न

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.


Give a reason for the following:

Alkali metals are good reducing agents.


State one use of the following metal:

Iron


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


Give two uses of Germanium  


State two important uses of following metal: 

Uses of zinc  


Write name.

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


Write scientific reason.

Anodes need to be replaced from time to time during the electrolysis of alumina.


Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3


What was Mendeleev's basis for the classification of elements?


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

Complete the following flow chart.


Which one of the following is an example for a metal?


The metal which is liquid at room temperature is ______.


The ability of metals to be drawn into thin wire is known as


Which one of the following four metals would be displaced from the solution of its salts by other three metals?


In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.

  1. ______  is a metal.
  2. Metals are good ______ of electricity. 

Silver and copper are very good conductors of electricity.


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