Answer / surinder kumar

Gas -Chromatography is based on the adsorption mechanism i.e.
if a substance is strongly adsorbed on the columns then that substance will get eluted in the last moments.
as 1,3 Butadiene gets adsorbed strongly to the columns due to its resonating structures(charged,polar-polar interactions,polar-non polar interactions due to neutral structure)so it gets eluted later than pentane which has no such interactions with the columns phase

what is the meaning of stress study?

2 Answers   Reddy Labs,

---

why is salt andv ice used in liquifyiny SO2

1 Answers   Graviti Pharmaceuticals,

---

what split ratio in gas chromatography.

9 Answers   Cipla, Glochem,

---

Is it compulsory to prepare KBr disc with sample in identification test by FTIR?

2 Answers  

---

1 why polyesterene film used for ftir calibration ? 2 why k2cr2o7 is used for control of abs in uv ? 3 why holmium oxide used for control of wavelength in uv

3 Answers  

---

how you start the solubility study?

0 Answers  

---

what is poarimeter, why it is used in pharma,and explain briefly about polarimeter?

3 Answers   GVK,

---

why sucrose not used in polarimeter calibration?

2 Answers   Cipla,

---

0.1 atom gram of the unknown element( X)reacts with 2.4 gram of O2 to produce the oxid product . can you tell us, what is the oxid formula ? a) XO b)X2O3 c)XO2 D) X2O4

1 Answers   Ajanta,

---

What is chiral and why this performing in HPLC

4 Answers   Hetero, Macleods,

---

what is the use of tap density apparatus? why we calculate it? what is the difference between the bulk density and tap density?

1 Answers   Alchemist, Alembic, Apex,

---

what is the most common FT-IR source used for the MID&Near IR regions?

1 Answers   Dr Reddys, Piramal Enterprises,

---