Solid State PYQs Set 5 (PDF)

Set 5 of 6 · Questions 121-150 of 153

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Mere Teacher · Previous Year Questions NEET Chemistry · Solid State · Set 5 (Q121-150)
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121. $An element (atomic mass = 100 g / m o l) having b cc structure has unit cell edge 400 p m . The density of element is$ (1) $7.289 g / c m^{3}$ (2) $2.144 g / c m^{3}$ (3) $10.376 g / c m^{3}$ (4) $5.188 g / c m^{3}$ 122. $The parameters of the unit cell of a substance are a = 2.5, b = 3.0, c = 4.0, α = 9 0^{0}, β = 12 0^{0}, γ = 9 0^{0} The crystal system of the substance is :$ (1) $Hexagonal$ (2) $Orthorhombic$ (3) $Monoclinic$ (4) $Triclinic$ 123. $Which of the following statements is not true about polymorphism?$ (1) $Polymorphism occurring in elements is called allotropy.$ (2) $NaF and MgO are polymorphous compounds.$ (3) $Single substance that exists in two or more forms is said to be polymorphous.$ (4) $Fullerene is a polymorphic form of carbon.$ 124. $Which of the following compounds is likely to show both Frenkel and Schottky defects in its crystalline form?$ (1) $AgBr$ (2) $KCl$ (3) $CsCl$ (4) $ZnS$ 125. $The incorrect statement about the imperfections in solids is :$ (1) $Schottky defect decreases the density of the, substance.$ (2) $Interstitial defect increases the density of the substance.$ (3) $Frenkel defect does not alter the density of the substance.$ (4) $Vacancy defect increases the density of the substance.$ 126. $Which of the following is not true about the amorphous solids?$ (1) $Amorphous solids can be moulded by heating.$ (2) $They are anisotropic in nature.$ (3) $On heating they may become crystalline at certain temperature.$ (4) $They may become crystalline on keeping for long time.$ 127. $The given unit cell belongs to the type$ (1) $Primitive unit cell$ (2) $Body centred unit cell$ (3) $Face centred unit cell$ (4) $End centred unit cell$ 128. $In a binary compound, atoms of element A form a hcp structure and those of element M occupy 2/3 of the tetrahedral voids of the hep structure. The formula of the binary compoundis :$ (1) $M_{2} A_{3}$ (2) $M_{4} A_{3}$ (3) $M_{4} A$ (4) $MA_{3} Official$ 129. $The number of nearest neighbours in a bcc unit cell is$ (1) $12$ (2) $8$ (3) $6$ (4) $4$ 130. $The substances which are weakly repelled by the magnetic field are$ (1) $diamagnetic$ (2) $paramagnetic$ (3) $ferromagnetic$ (4) $antiferromagnetic.$ 131. $Match items of List - I with those of List - II: List-I (Property) (A) Diamagnetism (B) Ferrimagnetism (C) Paramagnetism (D) Antiferromagnetism List-II (Example) (i) MnO (ii) O_{2} (iii) NaCl (iv) Fe_{3} O_{4} Choose the most appropriate answer from the options given below :$ (1) $(A) - (ii), (B) - (i), (C) - (iii), (D) - (iv)$ (2) $(A) - (i), (B) - (iii), (C) - (iv), (D) - (ii)$ (3) $(A) - (iii), (B) - (iv), (C) - (ii), (D) - (i)$ (4) $(A) - (iv), (B) - (ii), (C) - (i), (D) - (iii)$ 132. $What is total number of crystal systems associated with 14 Bravais lattices?$ (1) $7$ (2) $14$ (3) $1$ (4) $3$ 133. $Which among the following metals crystallises as a simple cube?$ (1) $Polonium$ (2) $Iron$ (3) $Copper$ (4) $Gold$ 134. $Which from following metal has ccp crystal structure?$ (1) $Cu$ (2) $Zn$ (3) $Mg$ (4) $Po$ 135. $A colloidal system consisting of a gas dispersed in a solid is called a/an:$ (1) $solid sol$ (2) $gel$ (3) $aerosol$ (4) $foam$ 136. $A metal crystallizes in a face centered cubic structure. If the edge length of its unit cell is 'a', the closest approach between two atoms in metallic crystal will be:$ (1) $22 a$ (2) $2 a$ (3) $\frac{a}{2}$ (4) $2a$ 137. $Which premitive unit cell has unequal edge lengths (a ¹ b ¹ c) and all axial angles different from 90º ?$ (1) $Monoclinic$ (2) $Triclinic$ (3) $Hexagonal$ (4) $Tetragonal$ 138. $Which of the following is a network crystalline solid?$ (1) $I_{2}$ (2) $AIN$ (3) $NaCl$ (4) $Ice$ 139. $The total number of octahedral void (s) per atom present in a cubic close packed structure is :$ (1) $2$ (2) $4$ (3) $1$ (4) $3$ 140. $Match the following. List-I (Magnetic property) (A) Ferromagnetic (B) Antiferromagnetic (C) Ferrimagnetic (D) Paramagnetif List-II (Substance) (1) O_{2} (2) CrO_{2} (3) MnO (4) Fe_{3} O_{4} (5) C_{6} H_{6} A B C D$ (1) $3241$ (2) $2341$ (3) $1354$ (4) $4235$ 141. $Which among the following compounds in crystalline form is used for making Nicol's prism?$ (1) $CaSO_{4}$ (2) $Na_{2} AlF_{6}$ (3) $CaCO_{3}$ (4) $Al_{2} O_{3}$ 142. $Which statement is not correct about fullerene C_{60} ?$ (1) $It contains 20 six-membered rings and 12 five membered rings.$ (2) $All carbon atoms undergo s p^{2} -hybridization.$ (3) $A six-membered ring is fused with six-membered ring only.$ (4) $A five-membered ring is fused with six-membered ring only.$ 143. $In a monoclinic unit cell the relation of sides and angles are respectively$ (1) $a = b ¹ c and α = β = γ = 90º$ (2) $a ¹ b ¹ c and α = β = γ = 90º$ (3) $a ¹ b ¹ c and α =γ = 90º ¹ β$ (4) $a ¹ b ¹ c and α ¹ β ¹ γ ¹ 90º$ 144. $In a face centered cubic lattice atoms A are at the corner points and atoms B at the face centered points. If atom B is missing from one of the face centered points, the formula of the ionic compound i :$ (1) $A B_{2}$ (2) $A_{5} B_{2}$ (3) $A_{2} B_{3}$ (4) $A_{2} B_{5}$ 145. $Which one of the following is a covalent crystal?$ (1) $Rock salt$ (2) $Ice$ (3) $Quartz$ (4) $Dry ice$ 146. $An alloy made up of A and B metals crystallises in a cubic lattice, where B atoms occupy the corners and A atoms occupy the face centers. The formula of the alloy formed is$ (1) $A B_{3}$ (2) $A_{3} B$ (3) $A_{2} B_{3}$ (4) $A_{3} B_{2}$ 147. $Which of the following is not a conductor of electricity?$ (1) $Solid NaCl$ (2) $Cu$ (3) $Fused NaCl$ (4) $Brine solution$ 148. $The unit cell with crystallographic dimensions, a \neq = b \neq = c, α = γ = 90^{\circ} and β \neq = 90^{\circ} is$ (1) $monoclinic$ (2) $tetragonal$ (3) $triclinic$ (4) $orthorhombic.$ 149. $The appearance of colour in solid alkali metal halides is generally due to:$ (1) $Schottky defect$ (2) $Frenkel defect$ (3) $Interstitial position$ (4) $F-centers$ 150. $Which among the following solids crystallises as a face-centred cube?$ (1) $Iron$ (2) $Rubidium$ (3) $Uranium$ (4) $Platinum$