Phytochemical and Pectin Experiment No.2 Quiz
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Questions and Answers

What sensation does astringent produce in the mouth?

Puckering feeling

What characteristic should methods used for phytochemical screening have?

Simple, rapid, designed for minimum use of equipment, reasonably selective, provide additional information

What does a brick red solution in Fehlings Test indicate?

Presence of reducing sugars

What is the purpose of chloroform in the preparation of alcoholic extract?

<p>To prevent fungal growth</p> Signup and view all the answers

Define the term 'acrid' based on the provided text.

<p>Producing an unpleasant irritating, tingling sensation</p> Signup and view all the answers

Why is it important for phytochemical screening methods to be reasonably selective?

<p>To identify the class of compounds under study</p> Signup and view all the answers

How is the concentration of cyanogenic glycosides measured in the Guignard Test?

<p>By the intensity of the red color</p> Signup and view all the answers

What color change indicates a positive result in the Guignard Test?

<p>Bright red</p> Signup and view all the answers

What does the formation of a precipitate indicate in the Test for Quaternary Bases and Amine Oxides?

<p>Presence of quaternary and/or amine oxide bases</p> Signup and view all the answers

How is the presence of alkaloids indicated in a test?

<p>Formation of precipitate</p> Signup and view all the answers

What is the significance of stable and dense froth in a preliminary test?

<p>Presence of free acids</p> Signup and view all the answers

What color precipitate indicates a positive result in the Ferric Chloride Test for tannins?

<p>Greenish black, blue black to black</p> Signup and view all the answers

How is the presence of either primary, secondary, or tertiary alkaloids confirmed?

<p>Positive result in the Confirmatory Test</p> Signup and view all the answers

How is the presence of glycosides indicated in a test?

<p>Precipitation or turbidity</p> Signup and view all the answers

What is the definition of Pharmacognosy?

<p>Pharmacognosy is an applied science dealing with the biological, biochemical, and economic features of natural drugs and their constituents.</p> Signup and view all the answers

What was the term used for 'material medica' in Western culture?

<p>Material Medica</p> Signup and view all the answers

How is the presence of Fixed oil, Fats, and Volatile oils tested?

<p>Stain Test on paper</p> Signup and view all the answers

What type of crystals are formed in Osazone Formation test?

<p>Crystals</p> Signup and view all the answers

What does a honeycomb froth greater than 3cm above the surface indicate in a froth test?

<p>Presence of saponins</p> Signup and view all the answers

What color indicates the presence of unsaturated steroids in the Salkowski Test?

<p>Cherry red coloration</p> Signup and view all the answers

Who wrote the most famous commentary on drugs titled 'De Materia Medica libri cinque'?

<p>Pedanios Diocorides</p> Signup and view all the answers

What color is indicative of a positive reaction in the Batesmith and Leucoanthocyanidins Metcalf Test?

<p>Strong red violet color</p> Signup and view all the answers

Who is credited with introducing the term 'PHARMACOGNOSY' derived from Greek words pharmakon and gnosis?

<p>C.A. Seydler</p> Signup and view all the answers

Which individual described the study of medicinal plants and their properties in the book 'Lehrbuch der Meteria Medica'?

<p>J.A. Schmidt</p> Signup and view all the answers

What is indicated by a purplish solution in Molisch's Test?

<p>Presence of carbohydrates</p> Signup and view all the answers

In the early 19th century, how did 'material medica' begin to divide?

<p>It began to divide into pharmacology (the action of drugs) and pharmacognosy (all aspects of drugs with lesser emphasis on actions).</p> Signup and view all the answers

What color is produced in Seliwanoff's Test if a ketose is present?

<p>Rose color</p> Signup and view all the answers

What does a red color indicate in the Test for pentoses?

<p>Presence of pentoses</p> Signup and view all the answers

What color solution is formed in Keller Killiani Test that gradually turns to blue?

<p>Reddish brown</p> Signup and view all the answers

What is one of the most important factors to be considered in phytochemical analysis?

<p>Extracting solvent or the menstrum</p> Signup and view all the answers

Why is it difficult to determine the presence of a particular class of compounds in plants?

<p>Large number of compounds occurring in the plant</p> Signup and view all the answers

Why is it easier to determine the absence or presence of phytoconstituents with a systemic phytochemical screening method?

<p>Follows a systematic approach</p> Signup and view all the answers

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