PHA317 - Pharmaceutics Solid State of
Matter UPDATED ACTUAL Questions and
CORRECT Answers
do solids have a definite shape - CORRECT ANSWER - yes
crystalline or amorphous
is the distance between molecules in solids different than in gases or liquids - CORRECT
ANSWER - yes
intermolecular distance is much smaller in solids
what is the most thermodynamic state for solids to be in - CORRECT ANSWER - in the
form of crystals
crystalline solid structure is characterized by - CORRECT ANSWER - the highly ordered
arrangement of molecules (lattice structure)
solids form crystals because they are - CORRECT ANSWER - stable
crystalline solid have molecules that are - CORRECT ANSWER - arranged in a rigid,
ordered, lattice structure
crystal formation involves two steps - CORRECT ANSWER - nucleation
crystal growth
what is the pre-requisite for the growth and eventual formation of ONE crystal - CORRECT
ANSWER - nucleation
what important factors affect nucleation - CORRECT ANSWER - 1. solvents
, 2. temperature
3. concentration
4. presence of impurities
the impurities in a solution are required - CORRECT ANSWER - to serve as the base or
platform on which nucleation can begin
what step happens after the nucleation stage in crystal formation - CORRECT ANSWER -
crystal growth
crystal habit or crystal shape come in what different dimension - CORRECT ANSWER -
needle or equidimensional (ie. cubic or trigonal)
plate like crystals are easier to inject than - CORRECT ANSWER - needle-like crystals
equidimensional crystals - CORRECT ANSWER - -have better flow properties than
needle form
-compact uniformly with ease
melting point of a solid - CORRECT ANSWER - temperature at which the crystalline
solid and liquid exists in equlibrium
the heat absorbed when one gram of a solid melts is - CORRECT ANSWER - heat of
fusion
crystal that is bound together by weak forces generally has a - CORRECT ANSWER - low
heat of fusion
pressure has an effect on the melting point, this can be calculated by the - CORRECT
ANSWER - Clausius-Clapeyron equation for solids
Matter UPDATED ACTUAL Questions and
CORRECT Answers
do solids have a definite shape - CORRECT ANSWER - yes
crystalline or amorphous
is the distance between molecules in solids different than in gases or liquids - CORRECT
ANSWER - yes
intermolecular distance is much smaller in solids
what is the most thermodynamic state for solids to be in - CORRECT ANSWER - in the
form of crystals
crystalline solid structure is characterized by - CORRECT ANSWER - the highly ordered
arrangement of molecules (lattice structure)
solids form crystals because they are - CORRECT ANSWER - stable
crystalline solid have molecules that are - CORRECT ANSWER - arranged in a rigid,
ordered, lattice structure
crystal formation involves two steps - CORRECT ANSWER - nucleation
crystal growth
what is the pre-requisite for the growth and eventual formation of ONE crystal - CORRECT
ANSWER - nucleation
what important factors affect nucleation - CORRECT ANSWER - 1. solvents
, 2. temperature
3. concentration
4. presence of impurities
the impurities in a solution are required - CORRECT ANSWER - to serve as the base or
platform on which nucleation can begin
what step happens after the nucleation stage in crystal formation - CORRECT ANSWER -
crystal growth
crystal habit or crystal shape come in what different dimension - CORRECT ANSWER -
needle or equidimensional (ie. cubic or trigonal)
plate like crystals are easier to inject than - CORRECT ANSWER - needle-like crystals
equidimensional crystals - CORRECT ANSWER - -have better flow properties than
needle form
-compact uniformly with ease
melting point of a solid - CORRECT ANSWER - temperature at which the crystalline
solid and liquid exists in equlibrium
the heat absorbed when one gram of a solid melts is - CORRECT ANSWER - heat of
fusion
crystal that is bound together by weak forces generally has a - CORRECT ANSWER - low
heat of fusion
pressure has an effect on the melting point, this can be calculated by the - CORRECT
ANSWER - Clausius-Clapeyron equation for solids
