????Pharmaceutics ????
???????? Emulsions and Suspensions ????????
1️⃣ Ideal phase volume ratio per stable emulsion……
A. 25:75
B. 50:50
C. 75:25
D. 33:67
2️⃣ Thermodynamically emulsion is ?
A. Stable
B. Unstable
C. Both
D. None
3️⃣ Creaming is?
A. Reversible
B. Irreversible
C. Both
D. Difficult to predict
4️⃣ Upward creaming is observed in ?
A. W/O
B. O/W
C. Both
D. Micro
5️⃣ HLB value of W/O
A. 2-3
B. 3-6
C. 7-9
D. 8-16
6️⃣ Pharmaceutical suspension are generally…
A. Flocculated
B. De-flocculated
C both
D none
7️⃣ Rate of sedimentation is high in?
A. Flocculated
B. De-flocculated
C. Both
D. None
8️⃣ If particle size is 1 micro-meter to 100 micro- meters… _
A. Coarse dispersion
B. Colloidal dispersion
C. Flocculated
D. De-flocculated
9️⃣ Cake formation is characteristic feature _
A. Flocculated
B. De- flocculated
C. Thixotropic suspension
D. Structured suspension
???? For Ideal suspension ,the sedimentation volume should be
A. Zero
B. Equal to one
C. More than one
D. Less than one
Answers
1). a
2). b
3). a
4). b
5). d
6). a
7). a
8). c
9). b
10). d
