St. Britto Hr. Sec. School - Madurai
12th Chemistry Monthly Test - 3 ( Solid State )-Aug 2020
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Define the term: space lattice.
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What are point defects?
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Which point effect in crystal doesn't alter the density of the relevant solid?
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Classify the following as amorphous or crystalline solids. Polyurethane, Naphthalene, Benzoic acid, Teflon, Potassium nitrate, Cellophane, Polyvinyl chloride, Fiber glass, Copper.
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Aluminium crystallises in a fee structure. Atomic radius of the metal is 125 pm. What is the length of the side of the unit cell of the metal?
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What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?
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Define the term amorphous.
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Define packing efficiency.
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Calculate the percentage efficiency of packing in case of body centered cubic crystal.
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State Bragg's law.
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What is the two dimensional coordination number of a molecule in square close packed layer?
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Why are solids rigid?
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Write short note on metal excess and metal deficiency defect with an example
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Sketch the
(a) Simple cubic
(b) face-centred
cubic and
(c) body centred cubic lattices. -
How do the spacings of the three planes (100), (101) and (111) of simple cubic lattice vary?
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A metallic element exists as a cubic lattice. Each edge of the unit cell is 2.88\(\mathring { A } \). The density of the metal is 7.20 g cm-3. How many unit cells there will be in 100g of the metal?
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Why are solids incompressible?
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Write the properties of ionic crystals.
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Write a note on the assignment of atoms per unit cell in fcc.
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What are molecular solids? Explain the types of molecular solids.
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if NaCl is doped with 10-2 mol percentage of strontium chloride, what is the concentration of cation vacancy
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What are the general characteristics of solids?
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A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body - centre. What is the formula of the compound? What is the coordination numbers of P and Q?
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KF crystallizes in fcc structure like sodium chloride. calculate the distance between K+ and F− in KF.( given : density of KF is 2483. gcm-3)
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Explain the following:
Similarities and differences between metallic and ionic crystals. -
What are stoichiometric defects in ionic solids? Explain
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Write a note on Frenkel defect.
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What is meant by the term “coordination number”? What is the coordination number of atoms in a bcc structure?
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