CHEM 104 Review Jeopardy (2)

Acids and Bases

Kinetics

Organic Chemistry

Polymers and Biopolymers

100

A BrØnsted-Lowry base is defined as a substance that __________. A) increases [H+] when placed in H2O B) decreases [H+] when placed in H2O C) increases [OH-] when placed in H2O D) acts as a proton acceptor E) acts as a proton donor

100

At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N2O5(g) → 4NO2 (g) + O2 (g) When the rate of formation of O2 is 2.2 × 10-4 M/s, the rate of decomposition of N2O5 is __________ M/s. A) 1.1 × 10-4 B) 2.2 × 10-4 C) 2.8 × 10-4 D) 4.4 × 10-4 E) 5.5 × 10-4

100

Which of the following compounds do not contain an sp3 hybridized oxygen atom? A) ketones B) alcohols C) ethers D) esters E) water

100

Proteins are biopolymers formed via multiple condensation coupling of which two functional groups? A) ester and amine B) amine and carboxylic acid C) alcohol and carboxylic acid D) alcohol and amine E) ester and carboxylic acid

200

Which one of the following is a BrØnsted -Lowry base? A) (CH3)3N B) CH3COOH C) HF D) HNO2 E) none of the above

200

The rate law of a reaction is rate = k[D][X]. The units of the rate constant are __________. A) mol L-1s-1 B) L mol-1s-1 C) mol2 L-2s-1 D) mol L-1s-2 E) L2 mol -2s-1

200

Which statement about hydrocarbons is false? A) The smallest alkane to have structural (constitutional) isomers has 4 carbon atoms. B) Cyclic alkanes are structural isomers of alkenes. C) Alkanes are more reactive than alkenes. D) Alkanes can be produced by hydrogenating alkenes. E) Alkenes can be polymerized.

200

The tertiary structure of proteins is maintained by __________ bonds. A) hydrogen B) dipole-dipole C) ion-dipole D) covalent E) all of the above

300

Of the following acids, __________ is not a strong acid. A) HNO2 B) H2SO4 C) HNO3 D) HClO4 E) HCl

300

One difference between first- and second-order reactions is that __________. A) the half-life of a first-order reaction does not depend on [A]0; the half-life of a second-order reaction does depend on [A]0 B) the rate of both first-order and second-order reactions do not depend on reactant concentrations C) the rate of a first-order reaction depends on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations D) a first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed E) None of the above are true.

300

Pentane has __________ structural isomers. A) 0 B) 1 C) 2 D) 3 E) 4

300

What forces hold the strands of DNA together? A) covalent bonds B) hydrogen bonding C) ion-dipole attraction D) coordinate covalent bonds

400

The hydride ion, H-, is a stronger base than the hydroxide ion, OH-. The product(s) of the reaction of hydride ion with water is/ are __________. A) H3O+ (aq) B) OH- (aq) + H2 (g) C) OH- (aq) + 2H+ (aq) D) no reaction occurs E) H2O2 (aq)

400

A compound decomposes by a first-order process. If 25.0% of the compound decomposes in 60.0 minutes, the half-life of the compound is __________. A) 65 minutes B) 120 minutes C) 145 minutes D) 180 minutes E) 198 minutes

400

The following reaction would produce a(n) __________. R-OH + R'COOH → A) ketone B) ether C) aldehyde D) alcohol E) ester

400

) How many chiral atoms does the open-chain form of glucose have? A) 1 B) 2 C) 3 D) 4 E) 5

500

In which of the following aqueous solutions does the weak acid exhibit the highest percentage ionization? A) 0.01 M HC2H3O2 (Ka = 1.8 × 10-5) B) 0.01 M HNO2 (Ka = 4.5 × 10-4) C) 0.01 M HF (Ka = 6.8 × 10-4) D) 0.01 M HClO (Ka = 3.0 × 10-8) E) These will all exhibit the same percentage ionization.

500

Which of the following is true? A) The rate-determining step of a reaction is the rate of the fastest elementary step of its mechanism. B) Since intermediate compounds can be formed, the chemical equations for the elementary reactions in a multistep mechanism do not always have to add to give the chemical equation of the overall process. C) In a reaction mechanism, an intermediate is identical to an activated complex. D) If we know that a reaction is an elementary reaction, then we know its rate law. E) All of the above statements are true

500

How many chiral centers are there in CH3CHCHCH2CHBr2?

500

Consider the following types of compounds: (i) amino acid (ii) nitrogen-containing organic base (iii) phosphoric acid (iv) five-carbon sugar From which of the above compounds are the monomers of nucleic acids, called nucleotides, formed? A) none B) (i) and (ii) C) (ii) and (iv) D) (ii), (iii), and (iv) E) all