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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State Two Important Uses of Following Metal Uses of Mercury

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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

The atomic number of an element X is 12.
(a) What must an atom of X do to attain the nearest inert gas electron configuration?
(b) Which inert gas is nearest to X?


Name an alloy of lead and tin.


Fill in the following blank with suitable word:

The electrical conductivity and melting point of an alloy is ........... than that of pure metals.


Mention two uses of the following metals and non-metals 

Iodine    


Fill in the blank 

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


State two important uses of following metal. 

Uses of copper  


State two important uses of following metal:

Uses of aluminium


Take an element from an alkali metal and one from an alkaline earth metal and write an equation  for their action with:

Hydrochloric acid,


Write name.
 Alloy of sodium with mercury.


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


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


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

iron


Write the name.

Two highly reactive metals-


Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.


Complete the following flow chart.


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.

The most abundant element in the universe is ____________.


Which of the following two combinations are correct?

 

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

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