arg the wells · guest · Chemistry

01 A student is checking a worked solution. For a fixed balanced equation, \(K_c\) changes when

A all concentrations are doubled instantly This does not satisfy the stated relationship.

B surface area changes This does not satisfy the stated relationship.

C temperature changes The equilibrium constant depends on temperature.

D a catalyst is added This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Equilibrium constants · answered at 6318 ms

02 Which response best completes this VCE-style item? Increasing temperature usually increases rate because particles

A collide more often and a larger fraction exceed activation energy Both collision frequency and the successful fraction increase.

B lower the activation energy themselves This does not satisfy the stated relationship.

C stop colliding elastically This does not satisfy the stated relationship.

D become heavier This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Collision theory · answered at 13771 ms

03 During a one-minute revision round: For a fixed balanced equation, \(K_c\) changes when

A a catalyst is added This does not satisfy the stated relationship.

B temperature changes The equilibrium constant depends on temperature.

C surface area changes This does not satisfy the stated relationship.

D all concentrations are doubled instantly This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Equilibrium constants · answered at 16739 ms

04 Which response best completes this VCE-style item? An alkene reacting with bromine undergoes

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

B esterification This does not satisfy the stated relationship.

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

D substitution This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Organic reactions · answered at 21107 ms

05 Which response best completes this VCE-style item? Structural isomers have

A the same molecular formula but different connectivity Structural isomers differ in how atoms are connected.

B the same physical properties in every case This does not satisfy the stated relationship.

C identical structural formulas This does not satisfy the stated relationship.

D different molecular formulas only This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Isomers · answered at 24744 ms

06 A student is checking a worked solution. Retention time is mainly used to

A balance redox equations This does not satisfy the stated relationship.

B measure nuclear charge This does not satisfy the stated relationship.

C determine pH directly This does not satisfy the stated relationship.

D help identify a component under fixed conditions Comparison with standards supports identification.

Written for icaijy.com · U4 · HPLC · answered at 31227 ms

07 Which response best completes this VCE-style item? Repeating measurements primarily helps assess

A whether the hypothesis is true by definition This does not satisfy the stated relationship.

B the accepted value automatically This does not satisfy the stated relationship.

C random uncertainty and repeatability Repeated trials reveal spread and improve the estimate of random variation.

D molar mass This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Experimental design · answered at 36317 ms

08 Which response best completes this VCE-style item? Reprocessing used aluminium into new aluminium products is closest to

A complete biodegradation This does not satisfy the stated relationship.

B a linear economy This does not satisfy the stated relationship.

C carbon capture This does not satisfy the stated relationship.

D a circular economy Material is recovered and returned to productive use.

Written for icaijy.com · U1 · Sustainability · answered at 41825 ms

09 During a one-minute revision round: Which functional group identifies a carboxylic acid?

A \(\mathrm{-COOH}\) Carboxylic acids contain the carboxyl group.

B \(\mathrm{-Cl}\) This does not satisfy the stated relationship.

C \(\mathrm{-OH}\) only This does not satisfy the stated relationship.

D \(\mathrm{C=C}\) This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Organic families · answered at 47768 ms

10 Which response best completes this VCE-style item? The most suitable apparatus for delivering one accurately known titration volume is a

A burette A burette measures accurately the variable volume delivered.

B beaker This does not satisfy the stated relationship.

C test tube This does not satisfy the stated relationship.

D measuring cylinder This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Volumetric analysis · answered at 53177 ms

11 During a one-minute revision round: An alkene reacting with bromine undergoes

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

B esterification This does not satisfy the stated relationship.

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

D substitution This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Organic reactions · answered at 58940 ms

12 During a one-minute revision round: A fuel cell differs from a battery because a fuel cell

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

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

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

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

Written for icaijy.com · U3 · Fuel cells · answered at 60000 ms