1. What is difference between anti-aromatic and non-aromatic compounds?
Anti aromatic compounds follows 4npi electron rule and are
cyclic compounds, planar, where as non aromatic are
nonplanar or planar, cyclic or acyclic.
2. What is the range of UV & vis lamp in spectrophotometer?
uv lamp range is 200 nm to 340 nm.
vis lamp range is 320 nm to 1100 nm.
both of lamp range is mfg instument company voice of record
is enculd the data range in lamp is 200 nm to 1200 nm.
If benzene and toluene mixed the boiling point will be ~ 90
0C. Density will not change.
4. Benzoic acid is a weaker than para nitro benzoic acid?
in p-nitrobenzoic acid due to -I effect of nitro group hydrogen present in acia become more elecronegative and easily remove as proton and act like strong acid
5. What is the difference between sulphated ash and ROI?
THERE NO DIFFERENCE BETWEEN PROCEDURE,BOTH ARE SAME.WE GENERALLY TERM IT AS SULPHATED ASH TEST/ROI.IN INDIAN PHARMACOEPIA,CALLED IT AS ROI AND IN USP,CALLED IT AS SULPHATED ASH TESH.BOTH ARE USED FOR THE DETERMINATION OF CONTENT OF INORGANIC MATTER IN AN ORGANIC SUBSTANCE.
high molecular weight easily we can seperate koH
7. What is the difference between PVC and uPVC plastic?
PVC-POLYVINYL CHLORIDE AND uPVC IS THE Unplasticized
polyvinyl chloride IT IS USED FOR building industry as a
low-maintenance material.
8. What Mean By Organic Chemistry?
Organic Chemistry is a branch of Science, which deals study
about carbon compounds except Carbon monoxide, Carbon di
oxide and corbonates.
c. Kerosine oil
10. What is the difference between an ion and a radical?
An ion is a specie that have no unpaired electron and is charged, either positively or negatively i.e. may be a cation or an anion. It is formed due to heterolysis of a molecule e.g HCl----> H+ + Cl-
A radical is a neutral specie having atleast one unpaired electron and is formed due to homolysis of a molecule e.g
H-H -------> H* + H*
The * shows an unpaired electron. Similarly CH3* is a radical.
11. How to synthsis toluene to benzaldehyde?
from directly reaction of toluene to cromyl chloride (CrO2Cl2)
at room temp. to form benzaldehyde.
12. How to make a 100ml solution with given 10gm of naoh?
Take 100ml water and pore 10gr NaOH
pellets sterr with gently boil. NaOH sol ready
13. HOW WE CAN DIFFERENTIATE BETWEEN OXALIC ACID AND TARTARIC ACID?
By Fluorescein test ...
where tartaric acid " used in baking powder and found
in many food products
oxalic acid : harmful in contact with skin or eyes
toxic .remove Ca ions From blood and also block Kidneys
Fluorescein test depended on Light passes & usually in UV light
