Question

What factor is most important in determining the chemistry of an organic molecule?

Question 21 options:

	the functional groups
	the number of carbon-carbon bonds
	the number of carbon-hydrogen bonds
	the number of branches in the carbon chain

What type of isomers are the following structures?

H-C-H HC-H HO-C-H H-C-OH Cl CI

Question 22 options:

	enantiomers
	cis-trans isomers
	totally different molecules
	constitutional isomers

An unknown compound B has been determined to be either propanal, propanoic acid or propanol. The unknown is fairly soluble in water and reacts when treated with Benedict's Solution. What is the identity of the unknown?

Question 23 options:

	propanol
	Insufficient information provided; can't determine.
	propanoic acid
	propanal

An unknown compound B has been determined to be either propanal, propanoic acid or propanol. The unknown is fairly soluble in water and reacts when treated with Benedict's Solution. What is the organic product from the reaction with the Benedict's Solution?

Question 24 options:

	propanol
	propanal
	propanoic acid
	propane

An unknown alcohol of molecular formula C₄H₁₀O forms only one alkene when treated with H₂SO₄. No reaction is observed when the alcohol is treated with an oxidizing agent. Name the alcohol.

Question 25 options:

	2-butanol
	2-methyl-2-propanol
	2-methyl-1-propanol
	1-butanol

Answer 1

21. Option A, since it the functional group

22. Structures are not clear

23. Option D, Propanal since it gives positive test with Benedict's reagent. Only aldehydes gives this test

24. Option C, propanoic acid. Since Benedict Reagent acts as oxidizing agent and oxidizes the aldehyde to carboxylic acid.

25. Option B, 2-methyl-2-propanol. Since it is tertiary alcohol hence it won't undergo oxidation and gives only one alkene on elimination.