Organic Chemistry Answers

How many moles of H₂ are required for for hydrogenation of oleic acid to stearic acid?

A) 1

B) 2

C) 3

D) 4

Which of the following is the valid IUPAC name for a-ketobutyric acid?

OA) 2-oxobutanedioic acid

OB) 3-oxobutanoic acid

C) 2-oxopentanoic acid

D) 2-oxobutanoic acid

Which of the following statements represents the CORRECT type of bonding in the following compounds? (1) CH3OH  ; ionic bonding (2) CH3CH2CH2Br ; polar covalent bonding (3) H-F  ; ionic bonding (4) CH3CH2OK ; covalent bonding 

🔹BOILING POINT AND FREEZING POINT OF SOLUTION

1. a solution is made of 2.00g sucrose in 100.00 g H2O. (Molecular weight of sucrose is 342 g/mol). Calculate the (a) Boiling point and (b) freezing point of the solution 

🔸OSMOTIC PRESSURE 

1. What is the osmotic pressure of a solution made up of 2.00g sucrose (C12H22O11) in 100mL of solution at 30°C? 

Identify the common name of 3-carboxy-3-hydroxy-pentandioic acid?

a)glycolic acid

b)salicylic acid

c)citric acid

d)ketobutiric acid

Why are soluble fibers identified as prebiotics?

Write maximum 5-10-line response.

Draw the structure of the two residue segment of DNA (3’) T-A (5’). 

When 78.95 J of heat are added to 8.7 g of an unknown substance, it's temperature rises from 32.10°C to 33.95°C. What is the heat capacity constant of the unknown substance?

Na 2 SO 4 , calculate the weight of mother liquor and crystals obtained

Acid/base extraction

1.Devise a flow chart that outlines the separations performed in experiment acid/base extraction of 2g of benzoic acid,1g of p-nitroaniline and 1g of azobenzene.

2.write down all the chemical reactions that occur in the extraction procedure of benzoic acid,p-nitroaniline and azobenzene.

3.Why is anhydrous sodium sulphate added to the "organic solution"?

4.Why are the "acidic extracts"and the "basic extracts" cooled before neutralization?

5.Why is water used for washing the precipitate on the funnels specified to be "cold"?