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Define pharmaceutical chemistry -The chemistry with studies about the drug design and synthesis of biologically active molecules is known as pharmaceutical chemistry.

Define impurities  - impurity are defined as the presence of undesired and unexpected material during any procedure that may effect the final product.

Define accuracy and precision accuracy is the closeness of measured value to the true value. Precision is the degree of repeatibility of same value or same result.

Define errors and enlist sources of errors Error is the difference between the standard value and measured value. Sources of errors – sample preparation error , error by analyst,reporting error equipment error calculation error error due to transport and storage.

Which apparatus is used in the limit test of arsenic? Gutzeit apparatus

Define chelating agent name any two chelating agents-Ligands having more than one electron donating group are called chelating agents. Examples copper chelators, iron chilators.

Define titration.Titration is a technique where a solution of non concentration is used to determine the concentration of an unknown solution.

Define neutralization reaction. Neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as product.

Define hematinics-They are the drug used to increase the concentration of hemoglobin in blood or used to cure anaemia mainly due to iron deficiency.

define antacids antacids are such substance which are used to neutralize the access amount of acid in the stomach.

define dental product dental products are those substance which prevent the dental carries dental decay and give the freshness and cleanness to the mouth and teeth.

Define dentrifices and write storage of it- It is a substance used for cleaning the reachable surface of the teeth with the toothbrush for example calcium carbonate calcium phosphate. It should be stored in a well close container define antitubercular agents the drugs which are used in the treatment of tuberculosis are called anti tubercular agents.