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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is ______.

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प्रश्न

Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is ______.

पर्याय

  • 1.86 × 10-8 cm

  • 1.52 × 10-8 cm

  • 2.15 × 10-8 cm

  • 4.3 × 10-8 cm

MCQ
रिकाम्या जागा भरा
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उत्तर

Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is 1.86 × 10-8 cm.

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पाठ 1: Solid State - Multiple choice questions

संबंधित प्रश्‍न

The major binding force in diamond is_______________ .

(a) Covalent bond                                                  

(b)  Ionic bond

(c) Metallic bond                                                   

(d)  Co-ordinate covalent bond


Explain the basis of similarities between metallic and ionic crystals.


Distinguish between crystalline solids and amorsphous solids.


Classify the following molecular solids into different types: 

  1. HCl
  2. CO2
  3. Solid ice
  4. SO2

Answer the following in brief.

Distinguish between ionic solids and molecular solids


A compound crystallizes in bcc structure. What is unit cell edge length if diameter of its atom is 120 pm?


In calcium fluoride, having the flurite structure the coordination number of Ca2+ ion and F Ion are ____________.


Define unit cell.


Fullerene is an example of ____________.


Solid X is a very hard electrical insulator in solid as well as in molten state. It melts at extremely high temperature. Solid X is a ____________.


Nature of binding forces present in carbon dioxide molecules in solid state are ____________.


Ionization enthalpy is lowest in ____________.


Which among the following is an example of non-polar molecule?


The hardest substance among the following is:


An AB2 type structure is found in ____________.


The compound, found in nature in gas phase but ionic in solid state is ____________.


Among solids, the highest melting point is exhibited by ____________.


The major binding force of diamond, silicon and quartz is ____________.


Which of the following cannot be regarded as molecular solid?

(i) SiC (Silicon carbide)

(ii) AlN

(iii) Diamond

(iv) I2


Which of the following is not true about the ionic solids?


An excess of potassium ions makes KCl crystals appear violet or lilac in colour since:

(i) some of the anionic sites are occupied by an unpaired electron.

(ii) some of the anionic sites are occupied by a pair of electrons.

(iii) there are vacancies at some anionic sites.

(iv) F-centres are created which impart colour to the crystals.


Who introduced the term covalent bond?


The major binding force in diamond, silicon and quartz is ______.


A reddish-pink substance on heating gives off a vapour which condenses on the sides of the test tube and the substance turns blue. If on cooling water is added to the residue it turns to original colour. The substance is ______.


Mention the res of the following solid:

CO2


What are intermolecular forces of attraction involved in molecular crystals?


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