Solid State - Maharashtra Board STD 12 Science Chemistry Questions

Q 1Answer the following in one or two sentence.2 Marks

What are Schottky defect and Frenkel defect?

Q 2Answer the following in one or two sentence.2 Marks

Silver crystallizes in fcc structure. If edge length of unit cell is $400 \ pm,$ calculate density of silver.$($Atomic mass of $Ag \ 108).$

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Q 3Answer the following in one or two sentence.2 Marks

Explain the following terms:
(a) Substitutional impurity defect (b) Interstitial impurity defect.

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Q 4Answer the following in one or two sentence.2 Marks

Explain metal deficiency defect with example.

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Q 5Answer the following in one or two sentence.2 Marks

Gold crystallises into face-centred cubic cells. The edge length of unit cell is $4.08 \times 10^{-8} \ cm$. Calculate the density of gold.
[Molar mass of gold $=197 gmol^{-1}]$

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Q 6Answer the following in brief.3 Marks

A compound forms hexagonal close packed (hcp) structure. What is the number of (i) Octahedral voids (il) Tetrahedral voids (iii) Total voids formed in 0.4 mol of it?

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Q 7Answer the following in brief.3 Marks

Silver crystallises in $\text{F.C.C.} ($face$-$centered cubic crystal$)$ structure. The edge length of the unit cell is found to be $408.7 \ pm.$ Calculate density of the unit cell. $[$Given: Molar mass of silver is $108 \ g \ mol^{-1}].$

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Q 8Answer the following in brief.3 Marks

A unit cell of iron crystal has edge length $288 \ pm$ and density $7.86 g \ cm^{-3} .$ Find the number of atoms per unit cell and type of the crystal lattice. $[$Given: Molar mass of iron $=56 g \ mol ^{-1}$; Avogadro's Number, $N_A = 6.022 \times 10^{23} .]$

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Q 9Answer the following in brief.3 Marks

Calculate the number of atoms present in $2$ gram of crystal which has face—centered cubic $(fcc)$ crystal lattice having edge length of $100 \ pm$ and density $10 \ g \ cm^{-3}$

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Q 10Answer the following in brief.3 Marks

Unit cell of a metal has edge length of $288 \ pm$ and density of $7.86 g \ cm^{-3}.$ Determine the type of crystal lattice.$($ Atomic mass of metal $= 56 g \ mol^{-1})$

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Q 11Answer the following questions:1 Mark

What is the coordination number of atoms in simple cubic crystal lattice?

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Q 12Answer the following questions:1 Mark

What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure?

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Q 13Answer the following questions:1 Mark

Give the relation between radius of atom and edge length in body centered cubic crystal.

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