अमानक वर्ण

अमानक वर्ण   Hindi grammar questions  for competitive exam  part-5   1  शुद्ध वर्तनी    2 . अमानक वर्ण   (i)  - शुद्ध वर्तनी ➨ बर्तन की शुद्ध " वर्तनी " क्या है ?   बर्तन का शुद्ध वर्तनी ➨ "बर्तन " का शुद्ध वर्तनी   "बरतन " है ∣   (ii) . अमानक वर्ण - हिंदी में बहुत से ऐसे वर्ण हुआ करते थे ,जो की वर्तमान समय में चलन में नहीं है ,अथवा हिंदी के मूल वर्णो में शामिल नहीं है।  इस प्रकार के  सभी वर्ण " अमानक वर्णो " की श्रेणी में  आते हैं Ι  अर्थात वे   " वर्ण " जो पूर्व में तो मान्य रहे हो ,परन्तु वर्तमान वर्णमाला के दृस्टीकोण   से मान्य न  होते हो , अमानक वर्ण है ।     अमानक वर्ण क्या है ➨ ऐसे वर्ण जिनका कोई " मानक " न हो , तथा जो सर्वमान्य न हो " अमानक " वर्ण है , अथवा ऐसे वर्ण जिनका पहले तो मानक रहा हो परन्तु वर्तमान समय में उनका कोई " मानक " न  हो अमानक वर्ण कहलाते है ।   अमानक वर्ण किसे  कहते है ➨ जब कोई वर्ण वर्तमान परिपेक्ष्य  के मानकों  पर खरा नहीं उतरता अथवा

metals and non-metals

 metals and non-metals


class 8 and class 10 questions and answer


 PHYSICAL PROPERTIES OF METALS AND NON-METALS

Physical Properties Include Physical State , Lustre , Colour , Hardness , Mallealibity , Ductility , Thermal Conductivity , Eletrical Conductivity ,and Sonority.
  • PHYSICAL STATE
      PHYSICAL STATE MEANS METALS AND NON-METALS ARE SOLID
  AT ROOM TEMPERATURE .


  •                      METALS  Amost  All metals ARE SOLID AT ROOM TEMPERATURE  .MERCURY IS AN EXCEPTION BECAUSE IT IS KNOWN TO OCCUR IN A LIQUID STATE AT OR NEAR ROOM TEMPERATURE                

  • NON-METALS - ALMOST ALL NON-METALS ARE SOLID OR GASES AT ROOM TEMPRATURE .

  • BROMINE  IS THE ONLY NON - METAL THAT IS LIQUID STATE AT ROOM TEMPERATUIRE .

  •   LUSTRE  

LUSTRE MEANS METALS AND NON- METALS GIVE SHINE AND BECAUSE OF THAT IT REFLECT LIGTH.


  • METALS - ' LUSTRE ' OR A SHINY SURFACE IS APROPERTY OF MOST METALS .
 THIS IS BECAUSE METALS CAN BE POLISHED . BECAUSE OF THEIR ABILITY TO SHINE AND REFLECT  LIGTH ,  METALS LIKE GOLD , SILVER ,  AND  PLATINUM ARE USED FOR MAKING JEWALERY AND OTHER DECORETIVE ARTICLES.


  •    NON-METALS - ALMOST ALL NON-METALS ARE HAVE DULL SURFACE . 

AS MOST FO THEM OCCUR AS POWERS AND GASES , THEY CANNOT BE POLISHED LIKE METALS . GRAPHITE (A FORM OF CARBON ) AND IODINE DO SHOW SOME LUSTRE .

  •  COLOUR


COLOUR MEANS THAT THE COLOUR OF METALS AND NON-METALS .



  •   METALS - MOST METALS ARE WHITE OR SHILVERY - GREY . THERE ARE, HOWEVER , A FEW EXCEPTIONS. FOR EXAMPLE , GOLD IS YELLOW AND COPPER IS REDDISH-BROWN.


  •  NON-METALS - SOME NON-METALS ARE COLOURLESS WHILE SOME ARE COLOURED . 
FOR EXAMPLE ,CHLORINE IS A GREENISH-YELLOW GAS,BROMINE
IS A BROWN LIQUID , IODINE IS A VIOLET SOLID AND OXYGEN AND NITROGEN ARE COLOURLESS.

  • HARDNESS

HARDNESS MEANS THAT THE HARDNESS OF METALS AND NON-METALS.


  •     METALS - Most of the metals are hard but some are in exception SODIUM and POTASSIUM are so soft that they can be cut with a knife.
  •  NON-METALS - Non-metals are soft but DIAMPND is a form of carbon ,is an exception .It is the hardest supstance known in the world. 

  • MALLEABILITY

MALLEABILITY MEANS THAT METALS AND NON METALS ARE  CONVERT INTO THIN SHEETS . 


  •   METALS - Most of the metals are beaten into thin sheets or foils.GOLD , SILVER and ALUMINIUM are the common example of this.


  •  NON-METALS - Non-metals are cannot be beaten into thin sheets or foils.

  •  DUCTILITY

DUCTILITY MEANS THAT METALS AND NON-METALS ARE CONVERT INTO THIN WIRES.


  •  METALS - Most  of the metals are can be covert into thin wires because they have a property that they can be convert into thin wires.COPPER, ALUMINIUM , GOLD and SILVER are the common example of this .


  •  NON-METALS - Non-metals are cannot be convert into yhin wires .

  • THERMAL CONDUCTIVITY  

THERMAL CONDUCTIVITY MEANS THAT METALS AND NON-METALS ARE GOOD CONDUCTOR OF HEAT.


  •  METALS - Metals are good conductor of heat ,they are used for making cooking utesils. SILVER is the best conductor of heat , after sivler, COPPER is the good conductor of heat .
NON-METALS - Non-metals are poor conductor of heat ,therefore , DIAMOND good conductor of heat which is in the exception .

  • ELECTRICAL CONDUCTIVITY 



 ELECTRICAL CONDUCTIVITY MEANS THATE METALS AND NON METALS ARE GOOD CONDUCTOR OF ELECTRICITY.  


  •  METALS - Metals are good conductor of electricity and they are used for making electrical wires and cables .


  •  NON-METALS - Non-metals nare poor conductor of good conctor of electricity but graphite is a good conductor of electricity which is in exception.

  • SONORITY


SONORITY MEANS THAT METALS AND NON-METALS PRODUCE A RINGING SOUND .


  •  METALS - When metal object struck with a hard object it make ringing sound because metals have a property of ringing sound .Objects like WIND CHIMES and BELLS make use to produce ringing sound 


  •  NON-METALS - Non-metals dosenot produce ringing sound when they struck with hard object .




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अमानक वर्ण

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