Organic summary for semester closing 1

Which molecule does not contain delocalized electrons?

• Ethene

• Pyrrole

• Benzene

• Phenol

• Formamide

Which of the following substances has the strongest attractive forces in the lattice structure in the solid state?

• Formaldehyde

• Methanol

• Acetic acid

• Glycine

• Methylamine

Which of the following compounds is a constitutional isomer of 2-methylbuta-1,3- diene (2-methyl-1,3-butadiene)?

• cyclopentene

• but-2-yne (2-butyne)

• 2,3-dimethylbut-2-ene (2,3-dimethyl-2-butene)

• 2,2-dimethylpropane (2,2-dimethyl propane)

• 2-methylbut-1-ene (2-methyl-1-butene)

Which of the following organic substances has the best solubility in water (at 25 ^oC and standard pressure)?

• Pyridine

• Phenol

• Ethyl acetate

• Diethyl ether

• Palmitic acid

Which line contains only gases which have molar mass smaller than that of oxygen molecule?

• Methane, ethyne, propene

• Formaldehyde, ethane, dimethyl ether.

• Methane, ethene, carbon monoxide.

• Butadiene, propyne, acetylene.

• Methylamine, propane, cyclopropane.

What is the formula of the carbohydrate formed during the hydrolysis of DNA?

• C₅H₁₀O_5.

• C₅H₁₀O_4.

• C₆H₁₂O₆.

• C₁₂H₂₂O₁₁

• C₁₂H₂₄O₁₂

Which line shows solutions of equal concentrations in increasing order of pH?

• formic acid, acetic acid, ethanol, sodium formiate, sodium ethoxide (sodium ethanolate)

• acetic acid, formic acid, ethanol, sodium ethoxide (sodium ethanolate), sodium formiate

• formic acid, acetic acid, ethanol, sodium ethoxide (sodium ethanolate), sodium formiate

•  ethanol, sodium ethoxide (sodium ethanolate), sodium formiate, acetic acid, formic acid

• formic acid, ethanol, acetic acid, sodium ethoxide (sodium ethanolate), sodium formiate

Which carbohydrate contains the highest number of chiral carbon atoms in its cyclic form?

• glucose

• fructose

• sucrose

• maltose

• ribose

Dissolving the following substances in water, which one yields a solution with a pH value higher then 7?

• Ethanol

• Acetic acid

• Phenol

• Methyl amine

• Glycerol

Which compound is not the monomer of any macromolecule?

• Propene

• Chloroethene

• Dimethyl ether

• Glycine

• Isoprene