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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Name the Following: the Chemical Compound Responsible for the Green Deposit on the Surface of Articles of Copper.

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प्रश्न

Name the following:

The chemical compound responsible for the green deposit on the surface of articles of copper.

एक शब्द/वाक्यांश उत्तर
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उत्तर

Copper carbonate (CuCO3)

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पाठ 6: Metals and Non-metals - Objective Type Questions

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विराफ जे. दलाल Simplified Middle School Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Objective Type Questions | Q 3.3

संबंधित प्रश्‍न

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.


Brass is an alloy of copper and ______.


Mention two uses of the following metals and non-metals 

Oxygen


Give reasons 

Graphite is used in the leads of pencils  


A metal with melting point less than 50°C is


A metal which is neither ductile nor malleable is


Statements given below are incorrect. Write the correct statements : 

Zinc is used for making power transmission wires.  


State the position of the following in the periodic table:

Iron and zinc


Why is hydrogen placed with alkali metals?


Write name.
 Alloy of sodium with mercury.


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

Lead


Give reasons for the following.

  1. Aluminum foils are used to wrap food items.
  2. Immersion rods for heating liquids are made up of metallic substances.
  3. Sodium and potassium are stored in kerosene.
  4. Mercury is used in thermometers.

Which of the following two combinations are correct?

 

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

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


The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?


Why are bells made of 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. 

The typical shine of metals is called ______.


X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

______ is the metallic element.


X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

______ is the reducing agent.


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