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Primary standard means standard in pure form,while
secondary standard is derived from primary standard.

the reaction in which large molecule split up to their smaller units by the addition of water molecules is called as 

1 Answers  

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Is anthracene aromatic?

1 Answers  

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What is organic metal?

2 Answers   Cipla,

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Mention the factors affecting solubility of compounds?

9 Answers   PH.D Interview,

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what is mean by 21 cfr

1 Answers  

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i am serching new job please help me

1 Answers   IPCA,

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what is the difference between coordinate covalent bond and covalent bond?

9 Answers   Flamingo Pharmaceuticals,

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Why some type of assays having limit 98% to102%? (if any compound having assay limit 100)

3 Answers   Asia Pharma, Reddy Labs,

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Why doesn't a halogen add to a carbonyl carbon?

3 Answers  

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Protactinium has a relatively short half-life for some of its isotopes. How does this characteristic impact its practical uses and research?

0 Answers  

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what is a primary standard? what is a secondary standard solutions?

1 Answers   Practical Viva Questions,

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Distinguish b/w CH3CHO and CH3COCH3 on the basis of IR?

1 Answers  

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