That y8 kid 🤣 - bot · guest · Chemistry

01 A student is checking a worked solution. A competitive inhibitor reduces activity by

A binding at the active site It competes with substrate for the active site.

B breaking every peptide bond This does not satisfy the stated relationship.

C becoming the product This does not satisfy the stated relationship.

D raising substrate concentration to infinity This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Enzymes · answered at 100 ms

02 A fuel cell differs from a battery because a fuel cell

A stores no chemical energy anywhere This does not satisfy the stated relationship.

B cannot produce electricity This does not satisfy the stated relationship.

C requires a continuing external supply of reactants Fuel and oxidant are continuously supplied.

D must use a molten electrolyte This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Fuel cells · answered at 100 ms

03 The anode of a discharging galvanic cell is

A uncharged by definition This does not satisfy the stated relationship.

B alternating This does not satisfy the stated relationship.

C negative Electrons leave the negative anode.

D positive This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Galvanic cells · answered at 100 ms

04 During a one-minute revision round: Oxidation is defined as

A formation of a precipitate This does not satisfy the stated relationship.

B loss of electrons Oxidation is electron loss.

C gain of protons only This does not satisfy the stated relationship.

D gain of electrons This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Redox · answered at 100 ms

05 A student is checking a worked solution. If \(Q<K_c\), the net reaction proceeds

A towards products More products form until Q reaches Kc.

B at equal forward and reverse rates immediately This does not satisfy the stated relationship.

C towards reactants This does not satisfy the stated relationship.

D only after adding catalyst This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Reaction quotient · answered at 100 ms

06 Which response best completes this VCE-style item? An alcohol and carboxylic acid can form an ester and

A hydrogen This does not satisfy the stated relationship.

B ammonia This does not satisfy the stated relationship.

C water Esterification is a condensation reaction producing water.

D oxygen This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Organic reactions · answered at 100 ms

07 A catalyst increases reaction rate by

A providing a pathway with lower activation energy A catalyst lowers activation energy and is regenerated.

B increasing reaction enthalpy This does not satisfy the stated relationship.

C being permanently consumed This does not satisfy the stated relationship.

D changing the equilibrium constant This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Reaction rates · answered at 100 ms

08 Which response best completes this VCE-style item? In a chromatogram, a pure substance under fixed conditions should ideally produce

A a spot beyond the solvent front This does not satisfy the stated relationship.

B one spot A single component ideally produces one spot.

C four spots This does not satisfy the stated relationship.

D no solvent front This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Chromatography · answered at 100 ms

09 During a one-minute revision round: An alcohol and carboxylic acid can form an ester and

A oxygen This does not satisfy the stated relationship.

B ammonia This does not satisfy the stated relationship.

C water Esterification is a condensation reaction producing water.

D hydrogen This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Organic reactions · answered at 100 ms

10 Which response best completes this VCE-style item? In the Brønsted–Lowry model, a base

A donates a proton This does not satisfy the stated relationship.

B must contain hydroxide This does not satisfy the stated relationship.

C accepts an electron only This does not satisfy the stated relationship.

D accepts a proton A Brønsted–Lowry base is a proton acceptor.

Written for icaijy.com · U2 · Acids and bases · answered at 100 ms

11 A student is checking a worked solution. In the Brønsted–Lowry model, a base

A accepts a proton A Brønsted–Lowry base is a proton acceptor.

B donates a proton This does not satisfy the stated relationship.

C must contain hydroxide This does not satisfy the stated relationship.

D accepts an electron only This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Acids and bases · answered at 100 ms

12 During a one-minute revision round: If \(Q<K_c\), the net reaction proceeds

A towards reactants This does not satisfy the stated relationship.

B only after adding catalyst This does not satisfy the stated relationship.

C towards products More products form until Q reaches Kc.

D at equal forward and reverse rates immediately This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Reaction quotient · answered at 100 ms

13 An alkene reacting with bromine undergoes

A esterification This does not satisfy the stated relationship.

B substitution This does not satisfy the stated relationship.

C addition The C=C bond opens and bromine atoms add.

D condensation polymer hydrolysis This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Organic reactions · answered at 100 ms

14 During a one-minute revision round: One mole of molecules contains approximately

A \(22.4\times10^3\) molecules This does not satisfy the stated relationship.

B \(6.02\times10^{-23}\) molecules This does not satisfy the stated relationship.

C 1 molecule This does not satisfy the stated relationship.

D \(6.02\times10^{23}\) molecules One mole contains Avogadro’s number of entities.

Written for icaijy.com · U1 · Avogadro constant · answered at 100 ms

15 Which response best completes this VCE-style item? In a galvanic cell, oxidation occurs at the

A anode Oxidation always occurs at the anode.

B cathode This does not satisfy the stated relationship.

C voltmeter This does not satisfy the stated relationship.

D salt bridge This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Energy · answered at 100 ms

16 During a one-minute revision round: The strongest intermolecular attraction between water molecules is

A covalent network bonding This does not satisfy the stated relationship.

B metallic bonding This does not satisfy the stated relationship.

C ionic bonding This does not satisfy the stated relationship.

D hydrogen bonding O–H bonds allow hydrogen bonding between molecules.

Written for icaijy.com · U1 · Intermolecular forces · answered at 100 ms

17 A student is checking a worked solution. In a galvanic cell, oxidation occurs at the

A cathode This does not satisfy the stated relationship.

B anode Oxidation always occurs at the anode.

C salt bridge This does not satisfy the stated relationship.

D voltmeter This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Energy · answered at 100 ms

18 A student is checking a worked solution. Two isotopes of the same element must have the same number of

A electrons in every ion This does not satisfy the stated relationship.

B neutrons This does not satisfy the stated relationship.

C nucleons This does not satisfy the stated relationship.

D protons Atomic number, hence proton number, defines the element.

Written for icaijy.com · U1 · Isotopes · answered at 100 ms

19 Which response best completes this VCE-style item? The IUPAC name of \(\mathrm{CH_3CH_2OH}\) is

A methanol This does not satisfy the stated relationship.

B ethene This does not satisfy the stated relationship.

C ethanol It is a two-carbon alcohol.

D ethanal This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Organic nomenclature · answered at 100 ms

20 The strongest intermolecular attraction between water molecules is

A metallic bonding This does not satisfy the stated relationship.

B covalent network bonding This does not satisfy the stated relationship.

C hydrogen bonding O–H bonds allow hydrogen bonding between molecules.

D ionic bonding This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Intermolecular forces · answered at 100 ms