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Total questions: 92
Worksheet time: 52mins
1. What are compounds made of?
Compounds are made of two or more different types of atoms
Compounds are made of only one type of atom
Compounds are made of molecules that contain only carbon
Compounds are made of mixtures of mixtures of gases and liquids
How do the particles in a liquid differ from those in a gas?
Particles in a liquid are closer together than in a gas.
Particles in a liquid move more rapidly than in a gas.
Particles in a liquid are fixed in place like in a solid.
Particles in a liquid have no motion compared to a gas.
What chemicol dish more accurate amongst listed below?
Groduated cylinder
Syringe
Burette
Pipette
What is the difference between pure substance and mixture?
Pure substance shows different properties while mixtures have same
Pure substance has same composition while mixtures vary.
Pure substances are heterogeneous
Pure substance can be separated into components by its physical properties
What is the ph of a solution if the hydronium ion concentration is 1.0 x 10^-5M?
5
9
7
3
Which of the following describes an amphoferic substance?
It can act as both an acid and a base
It dissociates completely in water
it cannot donate or accept protons
It is always neutral
If equal volumes of equimolar (same concentration) solutions of the chemicals below
were measured, which would contain the most hydrogen ions?
Sodium sulfate
Nitric acid
Lithium carbonate
Potassium hydroxide
Which of the following is an acid salt?
K2SO4
( NH4 )2SO4
KH2PO4
K3P04
What is the general readion for oxidation in an oxidation-reduction reaction?
Gain of electrons
Loss of protons
Loss of electrons
Gain of protons
Which mnemonic helps in remembering oxidation and reduction?
OIL RIG
BOND FORM
GAIN LOSS
REACTION COMPLETION
Which of the following is true for a substance with a positive standard reduction potential?
It is a strong reducing agent.
It has a strong tendency to lose electrons.
It Is easily reduced.
It is easily oxidized.
Electroplating is used fon
Refining metals
Coating an inferior metal with a superior one
Removing rust
Producing electricity
Which of the following chemicals helps reduce corrosion by absorbing CO2?
Calcium carbonate
Caustic soda
Sulfuric acid
Iron oxide
What is the main product of the corrosion of iron in an acidic environment?
Iron (Ill) oxide
Hydrogen gas
Oxygen gas
Calcium carbonate
Which of the following increases with the size of the carbon chain in alkanes?
Solubility in water
Melting point
Density
Flammability
In fractional distillation, where do the shorter hydrocarbon chains condense?
At the top of the distillation column
At the bottom of the distillation column
In the middle of the distillation column
They remain in vapor form
What type of bond is found in alkanes?
Single bond
Double bond
Triple bond
Aromatic bond
Which of the following is an example of an unsaturated hydrocarbon?
Cyclopropane
Ethene
Methane
Butane
Which of the following is an example of a cycloalkene?
Cyclopentane
Cyclobutene
Butadiene
Ethyne
What is the general formula for an alkadiene?
CnH2n-2
CnH2n
CnH2n-4
CnH2n+2
What are compounds made of?
Compounds are made of two or more different types of atoms
Compounds are made of only one type of atom
Compounds are made of molecules that contain only carbon
Compounds are made of mixtures of gases and liquids
How do the particles in a liquid differ from those in a gas?
Particles in a liquid are closer together than in a gas.
Particles in a liquid move more rapidly than in a gas.
Particles in a liquid are fixed in place like in a solid.
Particles in a liquid have no motion compared to a gas
What chemical dish more accurate amongst listed below?
Graduated cylinder
Syringe
Burette
Pipette
What is the difference between pure substance and mixture?
Pure substance shows different properties while mixtures have same
Pure substance has same composition while mixtures vary.
Pure substances are heterogeneous
Pure substance can be separated into components by its physical properties
In Rutherford's experiment, what was the key observation about a-particles that led to the nuclear model of the atom?
All particles were deflected
Most particles passed through the foil
All particles were absorbed by the foil
Electrons were deflected by the foil
Which of the following defines a Lewis acid?
Proton donor
Proton acceptor
Electron pair acceptor
Electron pair donor
Which scientist discovered the electron?
Michael Faraday
Robert Millikan
J.J. Thomson
Ernest Rutherford
Which salt is made when calcium carbonate reacts with hydrochloric acid?
Sodium chloride
Calcium bicarbonate
Calcium chloride
Carbon chloride
In the oxidation of copper to form CuO, which substance is reduced?
Copper
Oxygen
Electrons
Hydrogen
In the reaction 2Ag+ + 2CI-—> 2Ag + C12, which reactant is oxidized?
CI-
Ag+
CI2
Ag
In the electrolysis of sodium chloride (brine) solution, what is produced at the anode?
Chlorine gos
Sodium metal
Hydrogen gas
Oxygen gas
During olectrolysis, which ions are attracted to the cathode?
Positive ions
Negative ions
Neutral atoms
Electrons
In the corrosion process, oxidation occurs at which location?
Cathode
Anode
Both anode and cathode
Electrolyte
What is the chemical formula for yellowish rust?
Fe203
Fe(OH)2
Fe203 H20
Fe304
The structural isomers of a compound have the same:
Chemical formula but different structures
Bolling points
Chemical and physical properties
Bond angles
What is the IUPAC name for the compound with the formula СНЗСH2CH2CH3?
Butane
Pentane
Propane
Ethane
What is the suffix used in the IUPAC naming of alkenes?
- a n e
- y n e
- e n e
-diene
What is the general formula for alkynes?
CnH2n
CnH2n+2
CnH2n-2
CnHn
Which of the following statements is true about the bond strength in hydrocarbons?
Double bonds are stronger than single bonds
Single bonds are stronger than double bonds
Triple bonds are weaker than double bonds
Triple bonds are weaker than single bonds
How many double bonds are present in an alkadiene molecule?
One
Two
Three
Four
What are compounds made of?
Compounds are made of two or more different types of atoms
Compounds are made of only one type of atom
Compounds are made of molecules that contain only carbon
Compounds are made of mixtures of gases and liquids
How do the particles in a liquid differ from those in a gas?
Particles in a liquid are closer together than in a gas.
Particles in a liquid move more rapidly than in a gas.
Particles in a liquid are fixed in place like in a solid.
Particles in a liquid have no motion compared to a gas
What chemical dish more accurate amongst listed below?
Graduated cylinder
Syringe
Burette
Pipette
What is the difference between pure substance and mixture?
Pure substance shows different properties while mixtures have same
Pure substance has same composition while mixtures vary.
Pure substances are heterogeneous
Pure substance can be separated into components by its physical properties
In an electron configuration, which orbitals are filled first?
Higher energy orbitals
Outer orbitals
Lower energy orbitals
Magnetic orbitals
The acid dissociation constant (Ka) i s a measure of:
The strength of a base
The strength of an acid
The pH of water
The concentration of protons in a base
According to Dalton's Atomic Theory, which statement is true?
Atoms can be created and destroyed.
All atoms of a given element are identical.
Atoms of one element can change into atoms of another.
Compounds are formed by random ratios of elements.
The principal quantum number describes.
size of the orbital
shape of the orbital
spin of the orbital:
orientation of the orbital
Which of the following describes an electrochemical process?
Conversion of electrical energy into light
Movement of ions through a solution
Movement of electrons in a reaction
Loss of protons in a chemical reaction
In a galvanic cell, the anode is where:
Oxidation occurs
Reduction occurs
Both oxidation and reduction occur
Neither oxidation nor reduction occurs
What is the function of salt bridge in a galvanic cell?
To transfer electrons between the anode and cathode
To allow ions to migrate between two half cells
To generate electricity
To prevent reduction reactants
In electrolysis which electrode attracts cations?
Cathode
Anode
Both electrodes
Neither electrodes
Which component of crude oil is present in the highest percentage?
Hydrogen
Sulfur
Carbon
Nitrogen
Which type of hydrocarbon contains single bond between carbon atoms?
Alkenes
Alkanes
Alkynes
Aromatics
What type of hydrocarbons are alkynes considered to be?
Unsaturated hydrocarbons
Saturated hydrocarbons
Aromatic hydrocarbons
Alkenes
Which of the following is structural Isomer of butane (C4H10)
Pentane
Propane
Isobutane
Ethane
Which of the following hydrocarbons contains triple bond?
Ethane
Propyne
Butene
Cyclohexane
What type of isomerism occurs due to restricted rotation around the double bond in alkenes?
Functional isomerism
Geometric Isomerism
Positional isomerism
Structural isomerism
Which of the Following reactions is typical for alkenes?
Combustion
Substitution
Addition
Polymerization
Which of the following describes a cycloalkane?
A chain of carbon atoms with single bonds
A ring of carbon atoms with altemating single and double bonds
A ring of carbon atoms with single bonds
A chain of carbon atoms with a triple bond
In an aqueous solution, what does a base produce according to Arrhenius theory?
Hydronium ions (H30+)
Protons (H+)
Hydroxide ions (OH-)
Electrons
What is the pH of a neutral solution at 25°C?
1
7
1 4
0
Which of the following best describes Rutherford's Nuclear Model?
Electrons are embedded in a positively charged sphere
The nucleus occupies most of the atom's volume
The nucleus is positively charged and dense, with electrons surrounding it
Atoms are mostly solid with a central dense core
In Robert Millikan's oil drop experiment, what was measured?
The mass of the proton
The charge-to-mass ratio of the electron
The exact charge of the electron
The weight of the atom's nucleus
In a galvanic cell, the cathode is the site of:
Electron loss
Oxidation
Reduction
lonization
What is the standard reduction potential for a hydrogen electrode?
+ 0 . 7 6 V
0 V
-0.76 V
+1.00 V
What product forms of the cathode during the electrolysis of molten leadIl) bromide?
Lead
Bromine
Oxygen
Hydrogen
Which of the following is NOT a product of electrolysis?
Sodium
Hydrogen
Copper sulfate
Chlorine
Which process is used to separate different fractions of crude oil?
Combustion
Electrolysis
Fractional distillation
Sublimation
What is the general formula for alkanes?
CnH2n
CnH2n-2
CnH2n+2
CnHn
Which hydrocarbon is refined into gasoline (petrol)?
Methane
Heptane
Octane
Decane
How many carbon atoms does decane have?
5
6
10
12
According to Markownikov's Rule, in an addition reaction, the hydrogen alom adds to the
carbon atom that :
Has fewer hydrogen atoms
Has the most hydrogen atoms
Is in the middle of the chain
Has a double bond
What is the molecular formula of butane?
C4H10
C4H8
C4H6
C5H10
What is the condensed structural formula for propane?
C3H4
C3H8
СНЗСН2CH3
CH4
Which compound is used as an example of an aromatic hydrocarbon?
Methanol
Toluene
Acetylene
Ethene
Which of the following acids is considered strong?
Acetic acid
Hydrochloric acid (HCI)
Civic acid
Formic acid
What happens to an atom when it loses or gains electrons?
It forms a compound
It forms an lon
It becomes neufral
It turns into another element
Which quantum number determines the shape of the orbital?
Principal quantum number (n)
Magnetic quantum number (m)
Subsidory quantum number (l)
Spin quantum number (s)
Which definition of acids and bases states that an acid i s a proton donor and a base is
proton accepfor?
Arrhenius
Lewis
Brented-Lowry
Rutherford
In the electrolysis of water, which element is formed at the cathode?
Oxygen
Hydrogen
Chlorine
Sodium
During electrolysis, where does oxidation occur?
Cathode
Anode
Both electrodes
Electrolyte
In the electrochemical series, which ions are selectively discharged during electrolysis?
The lons with the highest concentration
The lons with the lowest concentration
The lont with the highest enorgy
The lons higher in the electrochemical series
What is Faraday's first law of electrolysis?
The mass of a substance produced at an electrode is proportional to the number of moles of electrons
transferred.
The mass of a substance produced is Inversely proportional to the current posted.
The electrode material determines the product.
All lons are equally discharged during electrolysis.
What is the boiling point trend of hydrocarbons in crude oll as the chain length Increases?
increases
decreases
Remains constant
First decreases, then increases
Which compound is an example of an aromatic hydrocarbon?
methane
Ethylene
Benzene
Butane
What type of corrosion occurs in a neutral or basic environment in the presence of oxygen?
Wet corrosion by hydrogen evolution
Wet corrosion by oxygen absorption
Electrolytic corrosion
Dry corrosion
What is the chemical formula for propane?
C 2 H 6
C 3 H 8
C 4 H 1 0
C6H14
What is the IUPAC name for CH3CH=СНСН3?
Butane
1 - B u t e n e
2 - B u t e n e
1-Butyne
Which of the following hydrocarbons contains a resonating system?
Hexane
Ethyne
B e n z e n e
Cyclopentane
The structure of a benzene molecule consists of:
Alternating double and single bonds
Triple bonds between carbon atoms
Single bonds only
A 7-membered carbon ring
In alkyne nomenclature, which suffix is used to indicate the presence of a triple bond?
a n e
e n e
diene
y n e
