Solid State Chemistry NEET Previous Years Question Papers

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1.Lithium has a bcc structure. Its density is 530 kg m–3 and its atomic mass is 6.94 g mol–1. Calculate the edge length of a unit cell of Lithium metal (NA = 6.02 × 1023 mol–1) [NEET 2016]
  •  (A) 527 pm
  •  (B) 264 pm
  •  (C) 154 pm
  •  (D) 352 pm

2.The ionic radii of A+ and B ions are 0.98 ×10–10 m and 1.81 × 10–10 m. The coordination number of each ion in AB is [NEET 2016]

  •  (A) 8
  •  (B) 2
  •  (C) 6
  •  (D) 4
3.In a solid lattice the cation has left a lattice site and is located at an interstitial position, the lattice defect is [AIIMS 1982& 1991; DCE 2002; J & K 2005]
  1. Interstitial defect
  2. Valency defect
  3. Frenkel defect
  4. Schottky defect
4.Schottky defect defines imperfection in the lattice structure of a [AIIMS 2002]
  1. Solid
  2. Liquid
  3. Gas
  4. Plasma
5.Ionic solids, with Schottky defects, contain in their structure [CBSE-PMT=1994]
  1. Equal number of cation and anion vacancies
  2. Anion vacancies and interstitial anions
  3. Cation vacancies only
  4. Cation vacancies and interstitial cations
6.Which one of the following has Frenkel defect [MP-PMT=2000]
  1. Sodium chloride
  2. Graphite
  3. Silver bromide
  4. Diamond
7.Point defects are present in [MP-PMT=1997]
  1. Ionic solids
  2. Molecular solids
  3. Amorphous solids
  4. Liquids
8.Which one of the following crystals does not exhibit Frenkel defect [MP PET 2002]
  1. AgBr
  2. AgCl
  3. KBr
  4. ZnS
9.Body centered cubic lattice has a coordination number of [AIIMS=1996; MP-PMT=2002]
  • (A) 4
  • (B) 8
  • (C) 12
  • (D) 6
10.A compound is formed by elements A and B. This crystallizes in the cubic structure when atoms A are the corners of the cube and atoms B are at the centre of the body. The simplest formula of the compounds is [KCET 1993; CBSE PMT 2000; Kerala PMT 2002]
  • (A) AB
  • (B) AB2
  • (C) A2B
  • (D) AB4
11.In a cubic structure of compound which is made from X and Y, where X atoms are at the corners of the cube and Y at the face centres of the cube. The molecular formula of the compound is [AIIMS 2000]
  • (A) X2Y
  • (B) X3Y
  • (C) XY2
  • (D) XY3
12.Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å. Assuming density of the oxide as  4.0g/cm−3, then the number of  Fe2+ and  O2− ions present in each unit cell will be                [MP PET 2000]
  • A) Four Fe2+ and four O2−
  • B)  Two Fe2+ and four O2−
  • C)  Four Fe2+ and two O2−
  • D)  Three Fe2+ and three O2−
13.In CsCl structure, the coordination number of Cs+ is [MP PMT 2001]
  • A) Equal to that of Cl− , that is 6
  • B) Equal to that of Cl− , that is 8
  • C) Not equal to that of Cl− , that is 6
  • D) Not equal to that of Cl− , that is 8
14.Most crystals show good cleavage because their atoms, ions or molecules are [CBSE PMT 1991]
  • A) Weakly bonded together
  • B) Strongly bonded together
  • C) Spherically symmetrical
  • D) Arranged in planes
15.What is the coordination number of sodium in Na2O [AIIMS 2003]
  • A) 6            
  • B) 4
  • C) 8            
  • D) 2
16.The number of atoms present in unit cell of a monoatomic substance of simple cubic lattice is [Pb. PMT 2004]
  • A) 6
  • B) 3
  • C) 2
  • D) 1
17.The coordination number of a metal crystallizing in a hexagonal close packed chep structure is [MP PMT 2004]
  • A) 12
  • B) 8
  • C) 4
  • D) 6
18.An element occurring in the bcc structure has 12.08×1023 unit cells. The total number of atoms of the element in these cells will be [MP PET 1994]
  • A) 24.16×1023
  • B) 36.18×1023
  • C) 6.04×1023
  • D) 12.08×1023
19.For an ionic crystal of the general formula AX and coordination number 6, the value of radius ratio will be [MP PMT 1993]
  • A) Greater than 0.73
  • B) In between 0.73 and 0.41
  • C) In between 0.41 and 0.22
  • D) Less than 0.22
20.The number of atoms in 100g of an fcc crystal with density d=10g/cm3 and cell edge equal to 100pm, is equal to [CBSE PMT 1994; KCET 2002]
  • A) 4×1025
  • B) 3×1025
  • C) 2×1025
  • D) 1×1025
21. In the crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions [CBSE PMT 1998]
  • A) LiF
  • B) CsF
  • C) CsI
  • D) LiI
22.The number of unit cells in 58.5g of NaCl is nearly [MP PMT 2000, 01]
  • A) 6×1020
  • B) 3×1022
  • C) 1.5×1023
  • D) 0.5×1024
23.In the Bragg?s equation for diffraction of X-rays, n represents for [MP PMT 2000]
  • A) Quantum number
  • B) An integer
  • C) Avogadro?s numbers
  • D) Moles

NEET MCQs Solution

15.Correct Answer: B           Solution : In Na2O, each oxide ions (O2−) is co-ordinated to 8Na+ ions and each Na+ ion to 4 oxide ions. Hence it has 4 : 8 co-ordination.
16.Correct Answer: Solution : In a simple cubic structure           z=18×8(atoms one at a corners)                 z=1
17.Correct Answer: A Solution : Co-ordination number in hcp structure is 12.
18.Correct Answer: A           Solution :  There are two atoms in a bcc unit cell.                 So, number of atoms in 12.08×1023  unit cells   =2×12.08×1023 =24.16×1023atom
19.Correct Answer: B Solution :The structural arrangement of co-ordination number ?6? is octahedral and its radius ratio is 0.414−0.732 . The example of octahedral is KCl and NaCl
20. Correct Answer: A
21. Correct Answer: c
22. Correct Answer: C
23 .Correct Answer: Solution : Bragg?s equation is =2dsinθ  where n is an integer i.e. 1, 2, 3, 4 etc.

Chemistry 12th C01 Solide State NEET Question
NEET 2020 to 1991

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