**Chapter 1 Solid State MCQs for Class 12 Chemistry**

Here students can practice** ****Chapter 1 Solid State MCQs for Class 12 Chemistry**. All the MCQs are divided into several sub-pages. Each page has 40 MCQs, for the next page just scroll down and click on the buttons. Also you can practice Class 12 Chemistry MCQs (Multiple Choice Questions) for other units.

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**Q 1.: If ‘a’ is the length of the side of a cube, the distance between the body-centered atom and one corner atom in the cube will be: **

(A) \( \frac{2}{\sqrt{3}}.a \)

(B) \( \frac{4}{\sqrt{3}}.a \)

(C) \( \frac{\sqrt{3}}{2}.a \)

(D) \( \frac{\sqrt{3}}{4}.a \)

Option – C

**Q 2.: The number of tetrahedral and octahedral voids in a CCP array of 100 atoms are respectively:**

(A) 100 and 200

(B) 200 and 100

(C) 200 and 200

(D) 100 and 100

Option – B

**Q 3.: Copper crystallises in a face-centered cubic lattice with edge length of 361 pm. What is the radius of copper atom ?**

(A) 157 pm

(B) 181 pm

(C) 128 pm

(D) 108 pm

Option – C

**Q 4.: A solid ‘AB’ has NaCl structure. If the radius of cation A ^{+} is 170 pm. Calculate the maximum possible radius of the anion B^{–}**

(A) 210.3 pm

(B) 397.4 pm

(C) 410.6 pm

(D) 347.9 pm

Option – C

**Q 5.: The appearance of colour in solid alkali metal halides is generally due to:**

(A) F-centres

(B) Frenkel defect

(C) Schottky defect

(D) Impurity defects

Option – A

**Q 6.: The percentage of void space for simple cubic, body centered cubic and hexagonal close packing arrangement respectively are**

(A) 48, 26, 32

(B) 26, 48, 32

(C) 48, 32, 26

(D) 32, 48, 26

Option – C

**Q 7.: The metal has a FCC lattice, The edge length of the unit cell is 404 pm. The density of the metal is 2.72 gm/cm ^{3}. The molar mass of the metal is:**

(A) 20 gm/mol

(B) 27 gm/mol

(C) 32 gm/mol

(D) 38 gm/mol

Option – B

**Q 8.: The number of carbon atoms per unit cell of the diamond unit cell is:**

(A) 2

(B) 4

(C) 6

(D) 8

Option – D

**Q 9.: Which of the following defects in the crystal lowers its density ?**

(A) Schottky defect

(B) Frenkel defect

(C) F-centres

(D) Impurity defects

Option – A

**Q 10.: Which one of the following is a covalent crystal ?**

(A) Rock Salt

(B) Ice

(C) Dry ice

(D) Quartz

Option – D

**Q 11.: An ionic solid, ‘AB’ crystallises in BCC lattice with edge length equal to 387 pm. The distance between two oppositely charged ions in the lattice is:**

(A) 300 pm

(B) 335 pm

(C) 250 pm

(D) 200 pm

Option – B

**Q 12.: The metal crystallises with a FCC lattice. The edge length of unit cell is 408 pm. The diameter of the metal atom is:**

(A) 288 pm

(B) 204 pm

(C) 408 pm

(D) 144 pm

Option – A

**Q 13.: Structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal ‘A’ and the octahedral voids are occupied by monovalent metal ‘B’. The formula of oxide is:**

(A) ABO_{2}

(B) A_{2}BO_{2}

(C) A_{2}B_{3}O_{4}

(D) AB_{2}O_{2}

Option – D

**Q 14.: If in a crystal lattice of a compound, each corner of a cube is enjoyed by sodium, each edge of a cube has oxygen and center of cube is enjoyed by tungsten, then give its formula:**

(A) Na_{2}WO_{4}

(B) NaWO_{3}

(C) Na_{3}WO_{3}

(D) NaWO_{3}

Option – B

**Q 15.: Sodium metal crystallises in BCC lattice with cell edge, 429 pm. What is the radius of sodium atom ?**

(A) 286 pm

(B) 681 pm

(C) 186 pm

(D) 168 pm

Option – C

**Q 16.: Which of the following compounds shows both Frenkel and Schottky defects ?**

(A) NaCl

(B) KCl

(C) AgCl

(D) AgBr

Option – D

**Q 17.: Schottky defect in crystal is observed when:**

(A) Density of crystal is increased

(B) An ion leaves its normal site and occupies an interstitial site

(C) Equal number of cations and anions are missing from the lattice

(D) Unequal number of cations and anions are missing from the lattice

Option – C

**Q 18.: Sodium crystallises in BCC arrangement with the interfacial separation between the atom at the edge 53 pm. The density of the solid is: **

(A) 1.23 gm/cc

(B) 0.48 gm/cc

(C) 4.85 gm/cc

(D) 2.42 gm/cc

Option – A

**Q 19.: A solid is formed by two elements P and Q. The element Q forms cubic close packing and atoms of P occupy one third of tetrahedral voids. The formula of the compound is:**

(A) PQ_{3}

(B) P_{2}Q_{3}

(C) P_{3}Q

(D) P_{3}Q_{2}

Option – B

**Q 20.: Aluminium has FCC structure. The length of the unit cell is 404 pm. If the density of the metal is 2.7 g/cc, the molar mass of Al atom is:**

(A) 26.80 gm/mol

(B) 27.80 gm/mol

(C) 28.46 gm/mol

(D) 26.10 gm/mol

Option – A

**Q 21.: The unit cell of a binary alloy composed of ‘A’ and ‘B’ metals, has a CCP structure with ‘A’ atoms occupying the corners and ‘B’ atoms occupying centres of each face of the cube. If during the crystallization of this alloy, in the unit cell two A-atoms are missed, the overall composition per unit cell is:**

(A) AB_{3}

(B) AB_{4}

(C) AB_{6}

(D) AB_{8}

Option – B

**Q 22.: The cubic unit cell of a metal (molar mass = 63.55 gm/mol) has an edge length of 362 pm. Its density is 8.92 gm/cc. The type of unit cell is:**

(A) Primitive Unit Cell

(B) Face-centered Unit Cell

(C) Body-centered Unit Cell

(D) End-centered Unit Cell

Option – B

**Q 23.: Which of the following statement is not correct ?**

(A) The fraction of the total volume occupied by the atoms in a primitive cell is 0.48

(B) Molecular solids are generally volatile

(C) The number of carbon atoms in a unit cell diamond is 8

(D) The number of Bravais lattices in which a crystal can be categorised is 14

Option – A

**Q 24.: If ‘a’ stands for the edge length of the cubic systems: simple cubic, body centered cubic and face centered cubic then the ratio of radius of the spheres in these systems will be respectively,**

(A) \( \frac{a}{2}:\frac{\sqrt{3}.a}{2}:\frac{a}{2 \sqrt{2}} \)

(B) \( \frac{a}{2}:\frac{\sqrt{3}.a}{4}:\frac{a}{\sqrt{2}} \)

(C) \( \frac{a}{2}:\frac{\sqrt{3}.a}{4}:\frac{a}{2\sqrt{2}} \)

(D) \( \frac{a}{2}:\frac{\sqrt{2}.a}{3}:\frac{\sqrt{3}.a}{2} \)

Option – C

**Q 25.: With which one of the following elements silicon should be doped so as to give p-type semiconductor ?**

(A) Germanium

(B) Arsenic

(C) Selenium

(D) Boron

Option – D

**Q 26.: Assertion (A) : No compound has both Schottky and Frenkel defects.**

**Reason (R) : Both defects change the density of the solid.**

(A) Both A and R are correct and R is the correct explanation of A.

(B) Both A and B are correct but R is not the correct explanation of A

(C) A is correct but R is incorrect

(D) Both A and R are incorrect

Option – D

**Q 27.: Edge length of a cube is 400 pm, its body-diagonal would be:**

(A) 566 pm

(B) 600 pm

(C) 500 pm

(D) 693 pm

Option – D

**Q 28.: In a FCC unit cell**

(A) Octahedral voids are present at the center of the edge as well as at the center of the body.

(B) There are two tetrahedral voids along the diagonal of a cube.

(C) Both A and B

(D) There are two octahedral voids along the diagonal of a cube.

Option – C

**Q 29.: The fraction of total volume occupied by the atoms present in a simple cube is:**

(A) \( \frac{\pi }{6} \)

(B) \( \frac{\pi }{4} \)

(C) \( \frac{\pi }{3\sqrt{2}} \)

(D) \( \frac{\pi }{4\sqrt{2}} \)

Option – A

**Q 30.: If AgI crystallises in zinc blende structure with iodide ions at lattice points. What fraction of tetrahedral voids is occupied by silver ions ?**

(A) 25 %

(B) 50 %

(C) 75 %

(D) 100 %

Option – B

**Q 31.: CsBr crystallises in a BCC lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 u and that of Br = 80 u. The density of CsBr is:**

(A) 42.5 gm/cc

(B) 0.425 g/cc

(C) 8.25 gm/cc

(D) 4.25 gm/cc

Option – D

**Q 32.: Pure silicon doped with phosphorous, is a**

(A) Metallic conductor

(B) Insulator

(C) n-type semiconductor

(D) p-type semiconductor

Option – C

**Q 33.: Na and Mg crystallise in BCC and FCC type crystals respectively, then the number of atoms of Na and Mg present in the unit cell of their respective crystal is:**

(A) 4 and 2

(B) 9 and 14

(C) 14 and 9

(D) 2 and 4

Option – D

**Q 34.: A particular solid is very hard and has a high melting point. In solid state, it is a non-conductor and its melt is a conductor of electricity. Classify the solid:**

(A) Metallic Solid

(B) Ionic Solid

(C) Molecular Solid

(D) Covalent or Network Solid

Option – B

**Q 35.: When electrons are trapped into the crystal in anion vacancy, the defect is known as:**

(A) F-centres

(B) Schottky defect

(C) Frenkel defect

(D) Metal deficient defect

Option – A

**Q 36.: The radius of Sodium ion and Chloride ion are 95 pm and 181 pm respectively. The edge length of NaCl unit cell is:**

(A) 276 pm

(B) 138 pm

(C) 552 pm

(D) 415 pm

Option – C

**Q 37.: Some of the polar crystals when heated produces small electrical current. This phenomenon is called _____________**

(A) Pyroelectricity

(B) Ferroelectricity

(C) Piezoelectricity

(D) Anti-ferroelectricity

Option – A

**Q 38.: In a face centered cubic lattice, a unit cell is shared equally by how many unit cells ?**

(A) 2

(B) 4

(C) 6

(D) 8

Option – C

**Q 39.: Which of the following unit cell having maximum number of atoms ?**

(A) HCP

(B) FCC

(C) BCC

(D) Cubic

Option – B

**Q 40.: Which of the following statement is incorrect about crystalline solids ?**

(A) Crystalline substances are anisotropic

(B) Crystalline solids have definite enthalpy of fusion.

(C) Solid SO_{2} is a polar molecular solid

(D) All covalent solids are poor conductor of electricity and are insulator

Option – D

**Pagination**

We hope that these **Chapter 1 Solid State MCQs for Class 12 Chemistry** helped you in learning new concepts. All questions are based on NCERT syllabus and some of them have been asked in various competitive exams. You can go to the next pages to practice more for **Chapter 1 Solid State MCQs for Class 12 Chemistry**, click on the question range given above.

Also you can practice Class 12 Chemistry MCQs (Multiple Choice Questions) for other units.