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Worksheets

29 April 2024

Total questions: 50

Worksheet time: 4hrs 10mins

Name
Class
Date
1.

Which of the following is a unit of rate of reaction?

a)

s-1

b)

Ms-1

c)

M

d)

M-1s-1

2.

For the reaction below, which of the following is the correct differential rate equation?


NH3(g) + O2(g) → NO(g) + H2O(g)

a)

rate = −d[NH3]dt=−d[O2]dt=d[NO]dt=d[H2O]dtrate\ =\ -\frac{\text{d}\left[NH_3\right]}{\text{d}t}=-\frac{\text{d}\left[O_2\right]}{\text{d}t}=\frac{\text{d}\left[NO\right]}{\text{d}t}=\frac{\text{d}\left[H_2O\right]}{\text{d}t}

b)

rate = −12d[NH3]dt=−13d[O2]dt=14d[NO]dt=12d[H2O]dtrate\ =\ -\frac{1}{2}\frac{\text{d}\left[NH_3\right]}{\text{d}t}=-\frac{1}{3}\frac{\text{d}\left[O_2\right]}{\text{d}t}=\frac{1}{4}\frac{\text{d}\left[NO\right]}{\text{d}t}=\frac{1}{2}\frac{\text{d}\left[H_2O\right]}{\text{d}t}

c)

rate = d[NH3]dt=d[O2]dt=−d[NO]dt=−d[H2O]dtrate\ =\ \frac{\text{d}\left[NH_3\right]}{\text{d}t}=\frac{\text{d}\left[O_2\right]}{\text{d}t}=-\frac{\text{d}\left[NO\right]}{\text{d}t}=-\frac{\text{d}\left[H_2O\right]}{\text{d}t}

d)

rate = −14d[NH3]dt=−15d[O2]dt=14d[NO]dt=16d[H2O]dtrate\ =\ -\frac{1}{4}\frac{\text{d}\left[NH_3\right]}{\text{d}t}=-\frac{1}{5}\frac{\text{d}\left[O_2\right]}{\text{d}t}=\frac{1}{4}\frac{\text{d}\left[NO\right]}{\text{d}t}=\frac{1}{6}\frac{\text{d}\left[H_2O\right]}{\text{d}t}

3.

Write a balanced chemical equation based on the given differential rate equation:

rate = −d[C2H6]dt= −27d[O2]dt=12d[CO2]dt=13 d[H2O]dtrate\ =\ -\frac{\text{d}\left[C_2H_6\right]}{\text{d}t}=\ -\frac{2}{7}\frac{\text{d}\left[O_2\right]}{\text{d}t}=\frac{1}{2}\frac{\text{d}\left[CO_2\right]}{\text{d}t}=\frac{1}{3}\ \frac{\text{d}\left[H_2O\right]}{\text{d}t}  

a)

C2H6 +  27\frac{2}{7}  O2  →\rightarrow   12\frac{1}{2}   CO2 +  13\frac{1}{3}   H2O

b)

 undefined  CO2 + undefined  H2O  →\rightarrow  C2H6 +  O2

c)

C2H6 +  72\frac{7}{2}  O2  →\rightarrow  2 CO2 + 3 H2O

d)

C2H6 +3 O2  →\rightarrow  2 CO2 + 3 H2O

4.
State the order for the reaction.
a)
zero
b)
1st
c)
2nd
d)
3rd
5.
A reaction has the rate law: Rate = k [A][B].
What is the overall order of reaction?
a)
1st
b)
2nd
c)
3rd
d)
4th
6.
The rate law for the reaction 2NO(g) + O2(g) → 2NO2(g) is first order in O2 and third order overall. What is the rate law for the reaction?
a)
Rate = k [NO]2[O2]2
b)
Rate = k [NO]1[O2]2
c)
Rate = k [NO]2[O2]1
d)
Rate = k [2NO]2[O2]1
7.
Determine the order of reaction with respect to concentration of A
a)
zero
b)
1st
c)
2nd
d)
3rd
8.

The catalyst alters the rate of a chemical reaction by,

a)

providing an alternative pathway with a lower Ea

b)

changing the products formed in the direction of the reaction

c)

providing a surface on which the molecules react

d)

increasing the frequencies of collisions between molecules

9.

Liz observes 2 reactions, A and B.


Reaction A is performed in a beaker placed on top of a hotplate.


Reaction B is is performed in a beaker placed within a container of ice.


Which of the following statements is true?

a)

Reaction A will react slower because the higher temperature will cause more collisions because the heat makes the molecules tired.

b)

Reaction A will react slower because the higher temperature will cause give the reactants higher speed and kinetic energy.

c)

Reaction B will react faster because the lower temperature causes the particles to move slower, allowing them to have more time to attach to one another.

d)

Reaction B will react slower because the lower temperature makes the particles move slower, resulting in less collisions.

10.
Which of the following is an endothermic process?
a)
solid to gas
b)
liquid to solid
c)
solid to liquid
d)
gas to liquid
11.
In a chemical reaction, the difference between the potential energy of the products and the potential energy of the reactants is the...
a)
free energy
b)
heat of reaction
c)
heat of fusion
d)
activation energy
12.
What kind of graph is this?
a)
endothermic
b)
exothermic
13.
Consider the reaction: 2 H2O + energy --> 2H2 + O2
a)
exothermic, releasing energy
b)
exothermic, absorbing energy
c)
endothermic, absorbing energy
d)
endothermic, releasing energy
14.

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.

a)

Warm

b)

Cold

c)

Bubbly

d)

Damp

15.

A 300 gram sample of a metal is cooled from 120 oC to 60 oC, and releases 4230 J of energy. What is the specific heat of the metal?

a)

7.61 x 107 J/goC

b)

4.26 J/goC

c)

0.47 J/goC

d)

0.235 J/goC

16.

Galvanic cells convert

a)

mechanical energy in to electrical energy

b)

potential energy in to electrical energy

c)

electrical energy in to chemical energy

d)

chemical energy in to electrical energy

17.
What reaction occurs at the anode?
a)
Ag+ + e- →Ag
b)
Ag → Ag+ + e-
c)
Ni2+ + 2e- → Ni
d)
Ni → Ni2+ + 2e-
18.

Reactions in galvanic/voltaic cells are

a)
spontaneous, redox reactions
b)
non-spontaneous, redox reactions
c)
spontaneous, non-redox reactions
d)
non-spontaneous, non-redox reactions
19.
In which direction does electricity flow in a voltaic cell (battery)?
a)
Electrons flow from the cathode to the anode
b)
Electrons flow from left to right
c)
Electrons flow from anode to cathode
d)
Electrons flow from right to left
20.

Given their standard reduction potentials, which of the species is going to be oxidized?

Cu2+/Cu = 0.34V

Zn2+/Zn = -0.76V

a)

Cu

b)

ZnSO4

c)

CuSO4

d)

Zn

21.

Which compound below is aromatic?

a)
b)
c)
d)
22.

What is the IUPAC name for the following compound?

a)

3-chlorophenol

b)

3-hydroxychlorobenzene

c)

1-chloro-3-hydroxybenzene

23.

What is reagent B?

a)

CH3CH2Br, AlBr3

b)

CH3Cl, AlCl3

c)

CH3CH2Cl, FeCl3

d)

CH3CH(CH3), AlCl3

24.

Identify the product for the following reaction (R) ?

a)
b)
c)
d)
25.

The only compound that will yield benzoic acid when reacted with acidified potassium dichromate (VI) solution is

a)

CH2=CH2

b)

C6H5C(CH3)3

c)

C6H5CH(CH2CH3)2

d)

Cyclohexane

26.

How would you classify 2-bromopropane as a haloalkane?

a)

Primary

b)

Secondary

c)

Tertairy

d)

Methyl

27.

The name of the mechanism when 1-bromopropane reacts with aqueous sodium hydroxide is...

a)

Nucleophilic addition

b)

Nucleophilic substitution

c)

Electrophilic addition

d)

Electrophilic substitution

28.

What is the organic product when 2-chlorobutane reacts with aqueous sodium hydroxide?

a)

Butene

b)

Butane

c)

Butan-2-ol

d)

Sodium butanoate

29.
Name this structure.
a)
1,2,4-dimethylcyclopentane
b)
1,2,4-trimethylcyclopentane
c)
1,3,4-trimethylcyclopentane
d)
1,3,4-dimethylcyclopentane
30.

CH3CH2OH + Na ------>

What is the product of this reaction?

a)

CH3CH2O-Na+

b)

CH3CH2Na+

c)

CH2=CH2

d)

CH3CH2CH3

31.

CH3CH2COOH + CH3CH2OH ------>

what is the product of this reaction?

a)

CH3CH2OOC+

b)

CH3CH2OH

c)

CH3CH2OCH3

d)

CH3CH2COOCH2CH3

32.

An organic compound X has the following chemical properties.

· Forms a yellow precipitate when tested with 2,4-dinitrophenylhydrazine.

· Forms a yellow precipitate when it reacts with an excess iodine in alkaline solution.

Which of the following compounds is X?

a)
b)
c)
d)
33.

Which of the following alcohols can be oxidised to 2-methyl-3-pentanone?

a)

CH3CH2CH(OH)CH3

b)

CH3CH(OH)CH2CH2CH3

c)

(CH3)3CCH(OH)CH3

d)

(CH3)2CHCH(OH)CH2CH3

34.

The following reaction scheme shows how propene can be prepared from propanal in two stages using reagents X and Y. Which of the following are the reagents X and Y?


X Y

CH3CH2CHO → CH3CH2CH2OH → H3CH=CH2

a)

X: LiAlH4 ; Y: KOH, ethanol, reflux

b)

X: NaBH4 ; Y: conc.H2SO4, heat

c)

X: dillute H2SO4 ; Y: conc.ethanol, reflux

d)

X: dillute H2SO4 ; Y: KOH, ethanol, reflux

35.

On heating compound X with acidified KMnO4, compound Y is obtained. Compound Y does not react with Fehling’s solution. X and Y are most likely to be,


Compound X Compound Y

a)

CH3COCH3 CH3COOH

b)

CH3CH(OH)CH3 CH3COCH3

c)

CH3CH2CH2OH CH3COCH3

d)

CH3CH2CH2OH CH3CH2CHO

36.

Which substance would test positively with 2,4-DNPH but negatively with Tollens’ reagent?

a)

Propanal

b)

Propanone

c)

Propanoic acid

d)

1-propanol

37.

What gas is produced when magnesium reacts with ethanoic acid?

a)

hydrogen

b)

carbon dioxide

c)

oxygen

d)

chlorine

38.

Give the name for the below structure based on IUPAC nomenclature.

a)

A 2-methyl-4-butanoic acid

b)

B 2-methyl-4-pentanoic acid

c)

C 3-methylbutanoic acid

d)

D 3-methylpentanoic acid

39.

Boiling points of carboxylic acids is higher than those of corresponding alcohols is due to

a)

Strong London dispersion forces

b)

Strong dipole dipole interaction

c)

Strong hydrogen bonded dimer

d)

Strong covalent bond

40.

Which of the following acids is the most soluble in water?

a)

ethanoic acid

b)

benzoic acid

c)

hexanoic acid

d)

octanoic acid

41.

Which carboxylic acid is most acidic?

a)

CH3CH2CH2COOH

b)

CH3CH2CH(Cl)COOH

c)

CH3CH(Cl)CH2COOH

d)

(Cl)CH2CH2CH2COOH

42.
Which compound has the highest boiling point?
a)
Butane
b)
Dimethyl ether
c)
Propan-1-ol
d)
Acetic acid
43.

Which of the following carboxylic acids is expected to have the highest boiling point?

a)

CH3CH2COOH

b)

CH3CH(OH)COOH

c)

CH2(COOH)2

d)

CH3CH(Cl)COOH

44.

What factor can decrease the solubility of carboxylic acid in water?

a)

The increase in length of the hydrocarbon chain.

b)

The decrease in length of the hydrocarbon chain.

c)

The increase in number of carboxyl group.

d)

The number of hydrogen bond.

45.

Which of the following amines do you expect to have the highest boiling point?

a)

Triethanamine

b)

Dimethanamine

c)

Methanamine

d)

Diethanamine

46.

Which is the correct arrangement of compounds based on decreasing order of Kb value?

a)

methyl amine > ammonia > phenyl amine

b)

phenyl amine > ammonia > methyl amine

c)

ammonia > phenyl amine > methyl amine

47.

Name the compound.

a)

N,N-dimethyl-3-pentanamine

b)

N,N-dimethyl-3-hexanamine

c)

N,N-dimethyl-3-ethylpropanamine

d)

N,N-dimethyl-5-ethylpropanamine

48.

The following statements are true about amines EXCEPT

a)

Only primary and secondary amines can form hydrogen bonding with water molecules.

b)

Amino compound can be prepared by reduction of nitrile compounds.

c)

The boiling point of tertiary amine is the lowest because it cannot form hydrogen bonding between molecules.

d)

Amino compound undergoes nucleophilic substitution with haloalkanes.

49.

Amino acid is a compound that consists of at least one group of

a)

amino and one amide group

b)

hydroxyl and one amine group

c)

amino and one hydroxyl group

d)

amino and one carboxyl group

50.

Which of the following statement is true about aminoethanoic acid?

a)

It exhibits optical isomerism.

b)

It exists in the anionic form in acidic solution.

c)

It forms zwitterions in aqueous solution

d)

It is soluble in non-polar solvents.

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