Interview Questions Answers in Analytical Chemistry, Organic Chemistry

Questions / { ankita }

Questions Answers Category Views Company eMail

NMR is both qualitative and quantitative?EXPLAIN

2 Analytical Chemistry 6870

why buffer is added in solvent system in HPLC ??

Lupin,

10 Analytical Chemistry 19908

how can we calculate void volume?give its importance in brief

Natco,

1 Analytical Chemistry 9854

Answers / { ankita }

Question { 8659 }

How many different types of carbon signals would be
observed by 13C-NMR?

Answer

primary,secondary,tertiary and quatnery.

Is This Answer Correct ?

3 Yes

2 No

Question { Amneal Pharmaceuticals, 14017 }

who is the father modern liqiud chromatogrphy?

Answer

MARTIN AND SYNGE.THEY LAID THE FORMATION OF LIQUID LIQUID
CHROMATOGRAPHY THEN GAS CHROMATOGRAPHY AND LATER ON HPLC.

Is This Answer Correct ?

24 Yes

0 No

Question { 14843 }

what is the difference betwen the analytical column &
peparative column?

Answer

analytical column is used for testing (in small scale) where as preparative column is used when we are synthesizing in large scale.

Is This Answer Correct ?

3 Yes

3 No

Question { Vimta Labs, 13209 }

What is split

Answer

THIS IS A TYPE OF INJECTORS.SAMPLE IS INTRODUCED INTO HEATED
CHAMBER VIA SRINGE THROUGH SEPTUM.CARRIER GAS SWEEPS THE
ENTIRE SAMPLE(IN CASE OF SPLITLESS MODE) OR A PORTION (IN
SPLIT MODE) OF SAMPLE INTO COLUMN.

Is This Answer Correct ?

8 Yes

1 No

Question { Aurobindo, 8613 }

what is the dipolement and how it is related to IR

Answer

DIPOLE MOMENT IS DEFINED AS PRODUCT OF THE MAGNITUDE OF
CHARGES AND DISTANCE BETWEEN TWO CHARGES.

IR ACTIVE ARE THOSE COMPOUNDS WHICH RESULTS IN CHANGE IN
DIPOLE MOMENT.

Is This Answer Correct ?

16 Yes

1 No

Question { Lupin, 19908 }

why buffer is added in solvent system in HPLC ??

Answer

to prevent ionization of weak acids and weak bases.

Is This Answer Correct ?

2 Yes

6 No