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level: LIQUEFACTION OF GASES LEVEL 2

Questions and Answers List

level questions: LIQUEFACTION OF GASES LEVEL 2

QuestionAnswer
What compounds have cubic forms• Sodium Chloride • Halite • Table Salt • KBr • LiCl • RbI • MgO • CaO • AgCl
What compound is a tetragonal form?• Urea
What compound is a rhombic form?• Iodine
What compounds have monoclinic forms?• Sucrose • Table sugar • Rectangular prism with a parallelogram as its base • Beet sugar
What compounds have triclinic forms?• Boric acid (aka borax) • 3 axes of different lengths intersecting at oblique angles
The property of crystallizing in two or more forms with distinct structure• Polymorphism
Solids that have more than one crystalline form• Polymorph
Theobroma Oil Polymorphic forms• Unstable gammar form (18C) • Alpha form (22C) • Beta prime form (28C) • Stable beta form (34C)
What are the types of Polymorphism?• Enantiomorphic (change is reversible) • Monotropic (change is unidirectional) • Isotropic (identical in all directions) • Anisotropic (different in all directions)
(change is reversible)• Enantiomorphic
(change is unidirectional)• Monotropic
(identical in all directions)• Isotropic
(different in all directions)• Anisotropic
A co-crystal created out of different solvents when a pharmaceutical solid is synthesized through chemical methods, purifications & crystallizations.• Solvates/Pseudopolymorphs
Amorphous Solids characteristics• Aka glasses or supercooled liquids • Non-crystalline; no definite order • No definite shape and no definite melting poits • Tend to flow when subjected to pressure • Amorphous form of drug is readily absorbed and therpeutically active