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Quiz 25
Mdcat-past-papers Quiz
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481. In crystalline structure, when length of all axes and angels are unequal then crystal will be:
Cubic
Monoclinic
Orthorhombic
triclinic
482. When an element occurs in different physical forms it is called:
Anisotropy
Isomerism
Polymorphism
Allotropy
483. The example of metallic solid is:
B
Cu
C
S
484. When a crystalline substance conducts current in one direction but not through other directions of the crystal, this property is called:
Allotropy
Isomorphism
Anisotropy
Polymorphism
485. Which of the following is not a molecular solids:
Sulphur
Bromine
Phosphorus
Carbon dioxide
486. Polymorphs have different:
Chemical properties
bonding
structure
all
487. Solids which are more volatile:
Ionic
Covalent
Molecular
Metallic
488. Greatest lattice energy is for:
LiF
NaCl
KBr
RbBr
489. Carbon in diamond is:
sp²
sp
sp²
sp³
490. Coordination number of each ion in NaCl is:
4
6
8
12
491. Diamond is:
molecular solid
ionic solid
Covalent molecule
Metallic solid
492. Nature of diamond as solid is:
Covalent
ionic
molecular
metallic
493. Which one of the following is as light as feather and as strong as iron?
graphite
graphene
mercury
diamond
494. A small building block which belongs to whole information about crystal structure is called:
Cell
Unit cell
Crystal lattice
Crystal unit
495. Which type of solid is called as atomic solid?
covalent solids
Ionic solids
Metallic solids
Molecular Solids
496. The two crystals NaNO₃ & CaCO₃ are both trigonal, they are:
Isomers
Polymorphs
Allotropes
Enantiomers
497. Cation and anion formed which combines to form crystal lattices:
Only cation is isoelectronic to nearest noble gas
Cation and anion both are isoelectronic to nearest noble gas
Cation and anion both are isoelectronic to nearest noble gas & No of electrons lost by metal and number of electrons gain by non-metal are equal
Only anion is isoelectronic to nearest noble gas
498. The molecules of iodine (I₂) form the:
Molecular crystals
Covalent crystals
Ionic crystals
Metallic crystals
499. The type of bonding in Zinc is:
Ionic
Covalent
Dative
Metallic
500. Which one of the following is semiconductor?
Al
Si
P
Mg
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