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Class-12,Chemistry
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Yeshwanth.v
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9868362580Contact No.o9677111319
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Which among the following is not an example of amorphous solids?
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1 point
Quartz
Glass
Coke
Plastic
Amorphous solids are also known as
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None of these
Poly crystalline solids
Pseudo solids
True solids
Which among the following is not true for crystalline solid?
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They do not show long range order
They show anisotropy
They have sharp melting point
They are also called true solids
Substances that are strongly attracted by applied magnetic field and can be permanently magnetized are
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Diamagnetic
Ferrimagnetic
Ferromagnetic
Paramagnetic
Defects in solids can be studied using
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Scanning electron microscopy
X - ray diffraction
All of these
Optical microscopy
Which type of solid conduct electricity in molten state but not in solid state?
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1 point
Metallic
Covalent
Ionic
Network
Packing efficiency in body centered cubic structure is
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100%
68%
74%
52.35%
Volume of unit cell occupied in face centered cubic arrangement is
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74%
52.35%
100%
68%
The radius ratio of body centred cubic structure is
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0.414 to 0.732
0.155 to 0.225
0.225 to 0.414
0.732 to 1.00
Which of the following lattices has the highest packing efficiency?
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Hexagonal close packed
Simple cubic
Body centered cubic
Primitive cubic
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