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the energy required to break a particular bond by a homolytic process.
Pharmaceutical Organic Chemistry Pharmacist Competitive Exams
Q. the energy required to break a particular bond by a homolytic process.
Ans → bond energy
Explanation →
This question is taken from the test/quiz post: one liner| organic| B.pharmacy| Pharmacy one liners |organic chemistry| B.pharmacy file-2 - attemp/practice
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Q. a chemical reaction in which two species (e.g. molecules, ions or radicals) react together to form new chemical species.
Ans → bimolecular reaction
Explanation →
Q. the energy required to break a particular bond by a homolytic process.
Ans → bond energy
Explanation →
Q. any of two or more hypothetical structures of resonance theory which can be written for a molecule simply by rearranging the valence electrons of the molecule.
Ans → canonical structures
Explanation →
Q. a solution of definite pH made up in such a way that the pH alters only gradually with the addition of an acid or a base.
Ans → buffer solution
Explanation →
Q. the energy required to break a particular bond by a homolytic process.
Ans → bond energy
Explanation →
Q. a substance that, when added to a reaction mixture, changes (speeds up) the rate of attainment of equilibrum in the system without itself undergoing a permanent chemical change.
Ans → catalyst
Explanation →
Q. the method for producing gasoline from heavy petroleum distillates.
Ans → catalytic cracking
Explanation →
Q. electron systems in which bonding electrons are not localised between two atoms as for a single bond but are spread (delocalized) over the whole group.
Ans → delocalization
Explanation →
Q. the process of improving the octane number of straight-run gasoline by increasing the proportion of aromatic and branched chain alkanes.
Ans → catalytic reforming
Explanation →
Q. the phenomenon in which plane polarised light is turned in a clockwise direction.
Ans → dextrorotatory
Explanation →
Q. reactions which proceed by means of a set of repeating cyclical steps, e.g. the free radical addition of hydrogen bromide to an alkene.
Ans → chain reaction
Explanation →
Q. stereoisomeric structures which are not enantiomers (mirror images) of one another.
Ans → diastereomers
Explanation →
Q. a term which may be applied to any asymmetric object or molecule. The property of non-identity of an object with its mirror image
Ans → chirality
Explanation →
Q. the angle between groups attached on adjacent carbon atoms when viewed in a Newman projection.
Ans → dihedral angle
Explanation →
More one-liners in - Pharmaceutical Organic Chemistry
Q. Specific case of drug embedding in insoluble excipients (typically in a polymer) in order to achieve extended release.
Ans → matrix formulation
Explanation →
Q. A chemical processes in which the proportion of more electronegative substituents is decreased, or the charge is made more negative, or the oxidation number is lowered.
Ans → reduction
Explanation →
Q. Name the large group of antigens bound by antibodies; large enough to settle out of fluid suspension
Ans → immune complex
Explanation →
Q. The clones of cell produced by fusing a normal B cell with a myeloma cell that is capable of producing monoclonal antibodies indefinitely
Ans → hybridoma
Explanation →
Q. A chemical in a reaction that is used up before other ingredients in the reaction, thus limiting how much of the resulting substance can be produced.
Ans → limiting reagent
Explanation →
Q. An interval before exponential growth of a microbial population during which cells adjust to a new environment
Ans → lag phase
Explanation →
Q. A group that is used to protect a functional group from unwanted reactions. After application the protecting group can be removed to reveal the original functional group.
Ans → protecting group
Explanation →
Q. Isomers that differ in the order the atoms are placed. They have the same number of atoms, just in a different order.
Ans → Constitutional Isomers
Explanation →
Q. Muscle glycogen does not directly contribute to blood glucose due to absence of the enyme
Ans → Absence of glucose 6-phosphatase
Explanation →
Q. A a term applied to an atom or molecule having one or more free valencies.
Ans → radical
Explanation →
Q. Type of mutation involving the addition of one or more bases into a DNA sequence
Ans → insertion
Explanation →
Q. A term applied to the combination of molecules of a substance with one another to form more complex systems.
Ans → association
Explanation →
Q. Antihelminthic drug of the benzimidazole class that binds to helminthic β-tubulin, preventing microtubule formation
Ans → mebendazole
Explanation →
Q. Powder particles, which have been aggregated to form larger irregular particles, usually of 0.5–2 mm diameter.
Ans → granules
Explanation →
Q. Inflammation of the conjunctiva in newborns caused by Chlamydia trachomatis transmitted during childbirth is
Ans → inclusion conjunctivitis
Explanation →
Q. electron systems in which bonding electrons are not localised between two atoms as for a single bond but are spread (delocalized) over the whole group.
Ans → delocalization
Explanation →
Q. A a term applied to an atom or molecule having one or more free valencies.
Ans → radical
Explanation →
Q. Adherence of particles into a larger mass due to moisture, static charge, or chemical or mechanical binding
Ans → agglomeration
Explanation →
Q. Name the compound with the greatest standard free energy.
Ans → Phosphoenolpyruvate
Explanation →
Q. Properties of a substance that can be observed without using a chemical reaction that would change the substance.
Ans → physical property
Explanation →
Q. The percent of dose entering the systemic circulation after administration of a given dosage form.
Ans → Bioavailability
Explanation →
Q. Name the process in which rapid freezing, followed by placement under a vacuum, of a material so that water is lost by sublimation, thereby inhibiting microbial growth
Ans → lyophilization
Explanation →
Q. A negative sign of free energy indicates that the reaction is
Ans → Exergonic or spontaneous
Explanation →
Q. An equimolar mixture of the two enantiomeric isomers of a compound.
Ans → racemic mixture
Explanation →
Q. Technological process, which consists of mixing or inclusion of the therapeutic substance with an excipient or their mixtures,
Ans → embedding
Explanation →
Q. Measure of the fraction of a given drug that is absorbed intact into the systemic circulation from a dosage form, relative to a recognized, clinically proven, standard dosage form of that drug.
Ans → relative bioavailability
Explanation →
Q. The amount of a specific radioactive material it takes to create a chain reaction.
Ans → critical mass
Explanation →