Sodium starch glycolate (commercially known as Explotab or Primojel) is a cross-linked sodium carboxymethyl ether of potato starch. Upon contact with gastrointestinal aqueous fluid, its granules swell rapidly by 200 to 300 percent of their dry volume, generating internal hydrostatic pressure that fractures the tablet matrix. Crospovidone functions predominantly by rapid water wicking and capillary action.
Purified talc (hydrated magnesium silicate) functions primarily as a glidant and antiadherent. Its lamellar crystalline platelets coat the irregular surfaces of granules, reducing inter-particulate friction and preventing adhesion to the die wall and punch faces, thereby promoting smooth, uniform gravity flow from the hopper into the die cavities during high-speed compression.
Microcrystalline cellulose (MCC, e.g., Avicel) is widely used as a direct-compression binder-diluent. During compaction it undergoes plastic deformation, creating close contact between particles and strong interparticle bonding. Its performance depends on grade, formulation, and compression conditions.
Q4. What undesirable chemical interaction occurs when primary amine drugs (such as Ampicillin or Fluoxetine) are compressed using Spray-Dried Lactose as a diluent?
Lactose is a reducing disaccharide containing a potential free aldehyde group that reacts with drugs possessing primary amine moieties in the presence of trace moisture and basic lubricants (such as magnesium stearate). This condensation cascadeโtermed the Maillard reactionโproduces brown-colored 1-amino-1-deoxy-2-ketose derivatives, resulting in tablet mottling and active drug potency loss.
Q5. Which tablet manufacturing defect is defined as the partial or complete separation of the top or bottom crown from the main body of a compressed tablet?
Capping is the partial or complete detachment of the upper or lower crown (face) of a tablet from the cylindrical main body. It is typically caused by air entrapment within the granule bed during rapid compression, excessive fine powders ('fines' >30%), insufficient binder, or punch tips that have worn into a feathered concave rim.
Bridging is a specialized film-coating defect where the polymeric film pulls away and shrinks from the recessed contours of bisecting lines, score marks, or intaglio lettering on the tablet core, bridging over the depression as an unsupported flat membrane. It is remedied by plasticizer adjustment, decreasing coating atomization viscosity, and improving core surface wettability.
What You Will Get in RRB PH UT07 – Pharmaceutics Practice Test 3: Solid Dosage Forms (Tablets & Capsules) PDF?
โ A high-quality PDF of RRB PH UT07 – Pharmaceutics Practice Test 3: Solid Dosage Forms (Tablets & Capsules) with proper formatting
โ Easy to read offline on mobile, tablet, or desktop
โ Great for revision, practice, and quick reference
โ Additional learning support with related videos and resources linked on this page
โ Supports our mission: โKnowledge for Everyoneโ
Why Choose Solotutes?
At Solotutes, we provide access to notes, quizzes, MCQs, one-liners, and tests for multiple exams. By downloading RRB PH UT07 – Pharmaceutics Practice Test 3: Solid Dosage Forms (Tablets & Capsules) in PDF format, you not only get valuable material but also become part of a growing community of learners. We regularly update our posts with videos, explanations, and extra content to help you understand topics better.
FAQs โ RRB PH UT07 – Pharmaceutics Practice Test 3: Solid Dosage Forms (Tablets & Capsules) Download
Q. Is this PDF really free? โ Yes! Free resources are completely free. Premium resources require a one-time unlock or pass.
Q. Do I need to sign up? โ For free PDFs, no account is needed. For premium tests, login is required to verify your purchase.
Q. Can I share this PDF with my friends? โ Yes, please share and help others learn too.
About Solotutes
Solotutes.com is dedicated to students preparing for competitive exams, schools, and universities. We provide free PDFs, quizzes, MCQs, notes, and one-liners to make learning easy and accessible.
๐ Tired of Waiting and Ads? Go PRO!
Upgrade to the SoloTutes Pro Pass and supercharge your exam preparation.
๐ซ Ad-Free Experience: Say goodbye to ads and 1-minute waiting timers.
๐ Custom PDF Generator: Build your own exam/subject-wise PDFs.
๐ PDF Library: Access 1000+ question eBooks.
๐ Unlock Test Series: Get access to all current and upcoming paid test series.