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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State Two Important Uses of Following Metal Uses of Mercury - Chemistry

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प्रश्न

State two important uses of following metal

Uses of mercury  

टीपा लिहा
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उत्तर

Uses of mercury :

  • It is used as a thermometric liquid in laboratory as well as clinical thermometers.
  • Gold amalgam and silver amalgam are used in dentistry for filling tooth cavities.
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पाठ 6: Metals and Non-metals - Additional questions 2

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Additional questions 2 | Q 3.1

संबंधित प्रश्‍न

Which property of 'solder' alloy makes it suitable for welding electrical wires?


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


Fill in the blank 

A metal that gives dazzling effect to crackers when they explode is ______


Statements given below are incorrect. Write the correct statements : 

Aluminium is best conductor of electricity.   


State the position of the following in the periodic table:

Aluminium


Write name.

Molecular formula of the common ore of aluminium.


Write scientific reason.

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


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


Give a reason why iron objects rust easily but the iron pillar at Qutab Minar has not rusted over the years.


State a specific reason for using copper in electrical cables


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.


Halogen reacts with acid.


Higher Order Thinking Skills.

Aakash noticed that the metal latch on gate was difficult to open during hot sunny days. However, it was not difficult to open the same latch at night. Aakash observed that the latch and the gate are exposed to the sun during day time.

  1. Formulate a hypothesis based on the information provided.
  2. Briefly state how you would test the hypothesis.

Can you store pickle in an aluminium utensil? Give reason.


The most abundant metal in the earth’s crust is ____________.


Name two soft metals which can be cut with a knife.


Compare the conductivity of metals and non–metals.


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

Metal atoms tend to have a maximum of ______ electrons in the outermost shell.


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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