Consider the information below and answer the question that follows. An unknown compound has been found to display the following: a. Insoluble in aqueous NaHCO3.
b. Insoluble in aqueous HCl.
c. Does not give a red, blue, purple or green color upon reaction with ferric chloride.
d. There is no yellow, orange, or red solid precipitate formed in the DNP test.
e. Does not give a precipitate in Lucas Test.

Which of the following compounds best fits the unknown

Ph- CH2-CH(CH3)- OH
|
H

The compound that best fits the unknown is Compound:

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.