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WorksheetsLAGA DADHI SECONDARY SCHOOL CHEMISTRY WORK SHEET FOR GRADE 11 TO 2017
Total questions: 122
Worksheet time: 1hrs 14mins
What is the name of a naturally occurring unrefined petroleum product composed of hydrocarbon deposits and other organic materials?
kerosene
Gasoline
Crude oil
Petroleum ether
What are the compositions of coal? It is mainly composed of
methane,ethane,propane,butane and small quantities of higher alkanes
alkanes,cycloalkanes,and aromatic hydrocarbons.
element carbon,low percentage of solid,liquid and gaseous hydrocarbons.
low percentage of carbon,compounds of nitrogen and Sulphur.
Which of the following is the functional group of alcohols?
What is the IUPAC name of the following organic molecule?
3-methyl1-2butanol
2,2-dimethyl1-2-buyanol
2-methyl1-3-butanol
3,3-dimethyl1-2butanol
Industrially ethanol can be prepared by
Dehydrohalogenation of ethyl halide with KOH.
Fermentation of carbohydrates such as sugar.
The reaction between calcium carbide and water.
The reaction between CH3COONa and soda lime.
Which liquid has the highest vapor pressure?
Diethyl ether
Ethanol
Toluene
Water
Which path represents the co-existence of liquid and gas phases?
Path C to D
Path D to E
Path A to B
Path B to C
Which of the following is true about the homologous series? The homologous series is
The existence of chemical compounds that have the same molecular formula but different structural formulas.
A structure in which the isomers have different positions of groups with respect to the double bond.
The property of an element to form chains with the repetition of the same atom.
A group of molecules each differing 'from the next member by a certain group.
What is the correct IUPAC name of the molecule?
2,2-dimethyl1-3-ethylhexane
4-ethy-5,5dimethylhexane
2,2-dimethyl1-3-propylpentane
2,2-dimethyl1-3-ethylpentane
In which solvent will both alkenes and alkynes dissolve?
Alcohols
Acetic acid
Water
Benzene
What is the molecular formula for butanal?
C4H8O2
C4H9O2
C4H8O
C4H10O
What are oxides? They are
Base anhydrides that react with water to form bases.
Binary compounds that contain oxygen in the -2 oxidation state.
Acid anhydrides that react with water to form acids.
Substance that have the link -O-O-
Which of the following is NOT true about the chemical property of acid anhydrides? They react with
Both acid and bases to form salt and water.
Basic oxides to give salts.
Water to form acids.
Bases to form salt and water.
Amphoteric oxides
Can be represented by CuO,FeO,Fe2O3 and Cr2O3
Are all non-metallic oxides.
Have neither acidic nor basic properties.
Have both acidic and basic properties
Oxides that have neither acidic nor basic properties are____________
Amphotheric
Neutral
Acidic
Basic
The spatial arrangement of atoms or groups about a double bond is known as ___________ isomerism.
Chain
Functional
Geometrical
Position
Which one of the following structures represents of trans-3-hexene?
What is the addition product formed when a mixture of benzene vapor and hydrogen is passed over finely divided nickel catalyst at 2000C?
C6H14
C6H12
C6H10
C6H13
A student took three different test tubes and added 5 mL of toluene (methylbenzene) to each test tube. Then, added 2 drops of Br2 in CCl4 in the 1st test tube, 2 drops of KMnO4 in the 2nd test tube and 2 drops of concentrated H2SO4 in the 3rd test tube. In which test tube does a reaction occur? In the ________ test tube(s).
1st and 3rd
1st, 2nd and 3rd
2nd
3rd
Natural gas is mainly composed of
Gases such as oxygen and hydrogen disulphide.
Methane gas.
All hydrocarbons.
Gases such as carbon dioxide and nitrogen.
Which of the following is true about the trends in the properties of these elements?
Ionization potential: T<
Electronegativity: X< Z < T
Nuclear charge: W > Z > T
Atomic radius: T> Y > S
Which of the following information can easily be obtained by just looking at the periodic table?
number of shells of an element.
Number of valence electron(s) of an element
Nature of the oxides of the elements?
Names, and symbols of the elements.
Why atoms form a chemical bond? To
transfer one or more electrons.
Share one or more pairs of electrons.
Attain a state of higher potential energy.
Achieve noble gas electronic configuration.
Which of the following statement is true?
Metals tend to gain electrons to form positively charged ions or cations.
Non-metals tend to lose electrons to form negatively charged ions or anions.
Group VIA elements form ions of the type X2+ by losing 2 electrons.
Group VA elements form ions of the type X3- by gaining 3 electrons.
What is an ionic bond? It is
A bond whose formation is favored by high ionization energy and low electron affinity of the combining elements.
A force of attraction between oppositely charged ions.
A bond whose formation is favored by low ionization energy and low electron affinity of the combining elements.
A force of attraction between positively charged nuclei of atoms and the shared electrons.
Which of the following is NOT the postulate of modern atomic theory?
Of the same element have identical chemical properties.
Of different element have different chemical properties.
Are the smallest particles of elements?
Are indivisible and indestructible.
One of the following statements is accepted by both Dalton's and modern atomic theories. Which one is it?
All elements are made up of very small particles called atoms.
Atoms of a given element are identical in mass.
Atoms of the same element may not be exactly alike.
An atom can be further subdivided into electrons, protons, and neutrons.
The existence of neutrons was discovered by
Ernest Rutherford.
Robert Millikan.
James Chadwick.
Joseph John Thomson
What is the relative electric charge of an electron?
-1
1.6 x 10-19 C
+ 1
-1.6 x 10-19 C
If a chemical symbol of iodine is given by 12753I, what are the number of electrons, protons and neutrons respectively?
74, 53, 53
5, 53, 74
35, 127, 53
53, 53, 127
Which of the following is true about the properties of ionic compounds? They
Have crystalline nature.
Are insoluble in polar solvents like water.
Have low melting and boiling points.
Conduct electricity in solid state.
A bond formed when atoms in a molecule share electron pairs is __________
Coordinate covalent
Metallic
Ionic
Covalent
The inter-molecular attraction between a partially positive hydrogen atom in one molecule and the partially negative atom in another molecule is
Van der waals force.
Hydrogen bonding.
London force.
Dispersion force.
In which of the following noble gas does the dispersion force is the strongest?
Ne
Xe
He
Ar
The statement 'Matter is neither created nor destroyed during a chemical reaction.' is the law of
Conservation of mass.
Definite proportions.
Multiple proportion.
Constant composition
The quantum mechanical description for the arrangement of electrons of an atom in atomic orbitals in order of increasing energy is known as _____________.
Valence shell
Valence electron
Electronic configuration
Diagonal rule
Which of the following is the ground state electron configuration for iron (Z = 26)?
[ Ar] 3d7 4s2
[ Ar] 4s1 3d7
[ Ar] 3d6 4s2
[ Ar] 4s2 3d6
The common name for group VIIA elements is
Noble gases
Halogens.
Alkali metals.
Alkaline earth metals.
What is the number of groups and periods in the modern periodic table respectively?
7,18
7,16
18,7
16,7
If a certain element has an electron configuration of 1s2 2s2 2p6 3s2 3p2, to which block and group of the periodic table does it belong?
P,IVA
P,IIA
S,IVA
S,IIA
Which of the following is NOT the industrial application of electrolysis? It is used for the
Production of non-metals.
Purification of metals.
Purification of non-metals.
Production of metals.
Which one of the following natural resources is renewable?
Petroleum
Water
Coal
Natural gas
Which of the following is NOT the general characteristic of industries? They
Use large amounts of energy in their manufacturing process.
Test their products during and after manufacturing in their quality control laboratories.
Involve mostly chemical processes to transform the raw materials to the desired products.
Use synthetic materials as raw materials for the production process.
Which step in the manufacturing of pulp and paper is used to remove coloring matter from wood pulp?
Kraft process
Bleaching
Pulping
Sulphite process
What is the negative logarithm of hydrogen (hydronium) ion concentration?
pH
pKa
pOH
pKw
What is the pH of a solution containing 0.0002 mole H+ per liter at 25 0C? (log2=0.3)
3.7
10.3
2
4
What is a strong base? It is a base that
Contains relatively large amount of solute in a given volume of solution.
Contains only a small amount of solute in a given volume of solution.
Ionizes partially or slightly in aqueous solution.
Ionizes completely or almost completely in aqueous solution.
Which of the following is a strong base?
Mg(OH)2
Ca(OH)2
Ba(OH)2
Zn(OH)2
What is the mathematical relationship between pH and pOH for a dilute water solution at 25 0C?
pOH = pKw+pH
pKw = pH - pOH =14
Kw = [H3O+][OH]-
pKw = pH+ pOH =14
Of the following method, which one is a traditional food preservation method?
Vacuum packing
Freeze drying
Salting
Freezing
Which of the following pollution is NOT common?
Sound
Air
Water
Land
Which of the following method can be used to reduce water pollution?
Lowering temperature furnaces and engines that reduce the amount of nitrogen oxides produced.
Banning of CFCs aerosol propellant gases to be replaced by less harmful alternatives.
Using moderate amounts of agricultural chemicals and increasing the use of organic fertilizers.
Burning or recycling plastics and other non - degradable materials.
Converting potentially dangerous chemical wastes into harmless substances, by combustion or by other chemical means is one of the main methods used to reduce
Air pollution.
Sound pollution.
Water pollution.
Land pollution.
Suppose that your teacher gave you a chance to visit a nearby cement industry. After the visit, you are expected to write a report about its environmental impact. What will be your main concern in your report?
How the production efficiency could be enhanced?
How the environment is affected by the industry?
What raw materials are used?
What the industry does.
What is the function of phosphorus in the growth of plants? It is used
To activate enzymes in photosynthesis.
For the synthesis of chlorophyll.
For the synthesis of amino acids.
To form nucleic acids.
What is the difference between metallic and electrolytic conductivity?
In metallic conduction new substance is produced.
Conductivity of electricity conductivity is simple physical change.
In metallic conduction there is net movement of the metal atoms.
In electrolytic conduction the charge carriers are positive and negatives ions.
Electrolysis is a
Process in which electrical energy is used to produce chemical changes.
Process which consists of two electrodes inside the cell.
Process in which there is a selection of the electrodes for one kind of ion.
System consisting of electrodes that dip into an electrolyte and in which chemical reaction generates electrical energy.
The strips of graphite that allow electrons to leave or enter the electrolyte are known as ____________.
Anions
Electrodes
Charge carriers
Cations
Which one of the following statement is true about electrolytic and galvanic cells?
In electrolytic cells, electrons flow from anode to cathode whereas in voltaic cells from cathode to anode.
In electrolytic cells, chemical reactions generate electricity whereas in voltaic cells electricity brings about chemical reactions.
In both electrochemical cells, anode is positive and cathode is negative.
In both electrochemical cells, oxidation takes place at anode and reduction takes place at cathode.
Why does an increase in temperature affect the rate of a reaction? Because, reactant molecules collide
More frequently with greater energy.
Less frequently with greater energy.
More frequently with less energy.
Less frequently with less energy.
Give the equation representing the reaction at equilibrium. PC1 5 (g) ⇄ PC1 3 (g) + Cl 2 (g) + 92.5 KJ Which statement is true about the reaction?
Increasing pressure will increase the yield of PCl 3 or Cl 2
Decreasing the volume of the system will shift the equilibrium to the right.
Increasing the temperature will shift the equilibrium to the right.
Removing PC1 3 as is formed will shift the equilibrium to the right.
Consider the following reaction that takes place inside a sealed reaction chamber. 2KClO 3 (s) → 2KCl(s) + O 2 (g). Which of the following will NOT increase the rate of reaction?
Decreasing the pressure.
Increasing the amount of KClO 3
Increasing the temperature.
Adding a catalyst.
Reactions which can take place in both forward and backward directions are called_______________.
One -way
Reversible
Irreversible
Equilibrium
According to the kinetic molecular theory.
Gases do not diffuse spontaneously into each other.
It is assumed that there is a strong attractive force between the gas molecules, because gas molecules are very close to each other.
Molecules in a gas have different velocities with different kinetic energies.
Gases are denser than solids and liquids.
Consider are the following experiment. The experiment demonstrates the law of
Conservation of mass.
Constant composition.
Mass action.
Multiple proportion
The following equation represents the oxidation of ammonia. NH 3 + O 2 → NO + H 2 O If the equation is correctly balanced, what are the balancing coefficients respectively?
4,5,4,and 6
4,6,4,and 5
2,2,2 and 6
6,2,2 and 2
In an endothermic reaction
The value of ∆H is negative.
Heat is released to the surrounding.
Heat is absorbed from the surroundings.
The internal energy of the reactants is more than the internal energy of the products.
Which of the following reaction is an exothermic reaction?
C 2 H 2 + O 2 + heat → CO 2 + H 2 O
N 2 + O 2 + 181 KJ/mol → 2NO
CaCO 2 (s) → CaO + CO 2
HNO 3 + H 2 S → NO + S + H 2 O + heat
The following energy diagrams represent the energy change for two reactions. Which statement is true about these reactions?
The change in enthalpy for the reaction A +B → C is positive.
The change in enthalpy for the reaction Z → X +Y is negative.
The reaction Z → X +Y is endothermic.
The enthalpy of C is greater than the sum of the enthalpies of A and B.
Charles' law states that
The volume of a fixed mass of a gas at a constant pressure is directly proportional to the temperature measured on the Kelvin scale.
Equal volumes of all gases, measured at the same temperature and pressure contain equal number of molecules.
The volume of a fixed mass of a gas is inversely proportional to its pressure when temperature is kept constant.
At constant volume, the pressure of a given mass of gas is directly proportional to the Kelvin temperature.
The combined gas law equation can be derived from
Avogadro's and Graham's laws
Charles,' and Graham's laws.
Boyle's and Charles' laws.
Boyle's and Avogadro's laws.
What is the pressure exerted by 48 g of CH 4 in a 30 L container at 300 K? (R = 0.0082 L.atm/mol.K, molar mass of CH =16 g/mol)
7.38 atm
8.2 atm
0.82 atm
2.46 atm
The migration or intermingling of molecules of different gases as a result of random molecular motion is known as ______________.
Convection
Diffusion
Evaporation
Osmosis
The evaporation of liquid depends on
Surface area.
Catalysts.
Concentration.
Volume.
Which of the following is decomposition reaction?
2NH 3 + H 2 SO 4 → (NH 4 ) 2 SO 4
2KNO 2 → 2KNO 2 + O 2
Zn + 2HCl → ZnCl 2 +H 2
CaCO 3 + 2HCl → CaCl 2 +CO 2 +H 2 O
How do you define oxidation in terms of electron transfer? It is the
Process whereby electrons are removed from atoms or ions.
Process whereby electrons are added to atoms or ions.
Combining of oxygen with other substances or the addition of oxygen to substances.
Process in which there is a decrease in the oxidation number of an element.
Which one of the following statements is true about oxidizing and reducing agents?
An oxidizing agent causes reduction to occur.
A reducing agent gains electron(s).
A reducing agent is reduced.
An oxidizing agent gains electron(s).
Which one of the following reactions is a non-redox?
3NO 2 + H 2 O → 2HNO 3 + NO
CuO + H 2 → Cu + H 2 O
HCl + KOH → KCl + H 2 O
Fe 2 O 3 + 3CO → 2Fe + 3CO 2
Consider the following experimental results: Experiment 1 Experiment 2 Reactants Ca(s) and HCl(aq) Zn(s) and HCl(aq) Temperature 20 o C 20 o C Concentration 1.0M 1.0M Rate of Reaction Fast Slow Which factor would account for the faster rate of the reaction in experiment-1?
Which factor would account for the faster rate of the reaction in experiment-1?
Nature of reactants
Concentration
Temperature
Surface area
What is the name of a naturally occurring unrefined petroleum product composed of hydrocarbon deposits and other organic materials?
kerosene
Gasoline
Crude oil
Petroleum ether
What are the compositions of coal? It is mainly composed of
methane,ethane,propane,butane and small quantities of higher alkanes
alkanes,cycloalkanes,and aromatic hydrocarbons.
element carbon,low percentage of solid,liquid and gaseous hydrocarbons.
low percentage of carbon,compounds of nitrogen and Sulphur.
Which of the following is the functional group of alcohols?
What is the IUPAC name of the following organic molecule?
3-methyl1-2butanol
2,2-dimethyl1-2-buyanol
2-methyl1-3-butanol
3,3-dimethyl1-2butanol
Industrially ethanol can be prepared by
Dehydrohalogenation of ethyl halide with KOH.
Fermentation of carbohydrates such as sugar.
The reaction between calcium carbide and water.
The reaction between CH3COONa and soda lime.
Which liquid has the highest vapor pressure?
Diethyl ether
Ethanol
Toluene
Water
Which path represents the co-existence of liquid and gas phases?
Path C to D
Path D to E
Path A to B
Path B to C
Which of the following is true about the homologous series? The homologous series is
The existence of chemical compounds that have the same molecular formula but different structural formulas.
A structure in which the isomers have different positions of groups with respect to the double bond.
The property of an element to form chains with the repetition of the same atom.
A group of molecules each differing 'from the next member by a certain group.
What is the correct IUPAC name of the molecule?
2,2-dimethyl1-3-ethylhexane
4-ethy-5,5dimethylhexane
2,2-dimethyl1-3-propylpentane
2,2-dimethyl1-3-ethylpentane
In which solvent will both alkenes and alkynes dissolve?
Alcohols
Acetic acid
Water
Benzene
What is the molecular formula for butanal?
C4H8O2
C4H9O2
C4H8O
C4H10O
What are oxides? They are
Base anhydrides that react with water to form bases.
Binary compounds that contain oxygen in the -2 oxidation state.
Acid anhydrides that react with water to form acids.
Substance that have the link -O-O-
Which of the following is NOT true about the chemical property of acid anhydrides? They react with
Both acid and bases to form salt and water.
Basic oxides to give salts.
Water to form acids.
Bases to form salt and water.
Amphoteric oxides
Can be represented by CuO,FeO,Fe2O3 and Cr2O3
Are all non-metallic oxides.
Have neither acidic nor basic properties.
Have both acidic and basic properties
Oxides that have neither acidic nor basic properties are____________
Amphotheric
Neutral
Acidic
Basic
The spatial arrangement of atoms or groups about a double bond is known as ___________ isomerism.
Chain
Functional
Geometrical
Position
Which one of the following structures represents of trans-3-hexene?
What is the addition product formed when a mixture of benzene vapor and hydrogen is passed over finely divided nickel catalyst at 2000C?
C6H14
C6H12
C6H10
C6H13
A student took three different test tubes and added 5 mL of toluene (methylbenzene) to each test tube. Then, added 2 drops of Br2 in CCl4 in the 1st test tube, 2 drops of KMnO4 in the 2nd test tube and 2 drops of concentrated H2SO4 in the 3rd test tube. In which test tube does a reaction occur? In the ________ test tube(s).
1st and 3rd
1st, 2nd and 3rd
2nd
3rd
Natural gas is mainly composed of
Gases such as oxygen and hydrogen disulphide.
Methane gas.
All hydrocarbons.
Gases such as carbon dioxide and nitrogen.
The following chart shows the position of different elements in the periodic table. Which of the following is true about the trends in the properties of these elements?
Ionization potential: T<
Electronegativity: X< Z < T
Nuclear charge: W > Z > T
Atomic radius: T> Y > S
Which of the following information can easily be obtained by just looking at the periodic table?
number of shells of an element.
Number of valence electron(s) of an element
Nature of the oxides of the elements?
Names, and symbols of the elements.
Why atoms form a chemical bond? To
transfer one or more electrons.
Share one or more pairs of electrons.
Attain a state of higher potential energy.
Achieve noble gas electronic configuration.
Which of the following statement is true?
Metals tend to gain electrons to form positively charged ions or cations.
Non-metals tend to lose electrons to form negatively charged ions or anions.
Group VIA elements form ions of the type X2+ by losing 2 electrons.
Group VA elements form ions of the type X3- by gaining 3 electrons.
What is an ionic bond? It is
A bond whose formation is favored by high ionization energy and low electron affinity of the combining elements.
A force of attraction between oppositely charged ions.
A bond whose formation is favored by low ionization energy and low electron affinity of the combining elements.
A force of attraction between positively charged nuclei of atoms and the shared electrons.
Which of the following is NOT the postulate of modern atomic theory?
Of the same element have identical chemical properties.
Of different element have different chemical properties.
Are the smallest particles of elements?
Are indivisible and indestructible.
One of the following statements is accepted by both Dalton's and modern atomic theories. Which one is it?
All elements are made up of very small particles called atoms.
Atoms of a given element are identical in mass.
Atoms of the same element may not be exactly alike.
An atom can be further subdivided into electrons, protons, and neutrons.
The existence of neutrons was discovered by
Ernest Rutherford.
Robert Millikan.
James Chadwick.
Joseph John Thomson
What is the relative electric charge of an electron?
-1
1.6 x 10-19 C
+ 1
-1.6 x 10-19 C
If a chemical symbol of iodine is given by 12753I, what are the number of electrons, protons and neutrons respectively?
74, 53, 53
5, 53, 74
35, 127, 53
53, 53, 127
Which of the following is true about the properties of ionic compounds? They
Have crystalline nature.
Are insoluble in polar solvents like water.
Have low melting and boiling points.
Conduct electricity in solid state.
A bond formed when atoms in a molecule share electron pairs is __________
Coordinate covalent
Metallic
Ionic
Covalent
The inter-molecular attraction between a partially positive hydrogen atom in one molecule and the partially negative atom in another molecule is
Van der waals force.
Hydrogen bonding.
London force.
Dispersion force.
In which of the following noble gas does the dispersion force is the strongest?
Ne
Xe
He
Ar
The statement 'Matter is neither created nor destroyed during a chemical reaction.' is the law of
Conservation of mass.
Definite proportions.
Multiple proportion.
Constant composition
The quantum mechanical description for the arrangement of electrons of an atom in atomic orbitals in order of increasing energy is known as _____________.
Valence shell
Valence electron
Electronic configuration
Diagonal rule
Which of the following is the ground state electron configuration for iron (Z = 26)?
[ Ar] 3d7 4s2
[ Ar] 4s1 3d7
[ Ar] 3d6 4s2
[ Ar] 4s2 3d6
The common name for group VIIA elements is
Noble gases
Halogens.
Alkali metals.
Alkaline earth metals.
What is the number of groups and periods in the modern periodic table respectively?
7,18
7,16
18,7
16,7
If a certain element has an electron configuration of 1s2 2s2 2p6 3s2 3p2, to which block and group of the periodic table does it belong?
P,IVA
P,IIA
S,IVA
S,IIA
Which of the following is NOT the industrial application of electrolysis? It is used for the
Production of non-metals.
Purification of metals.
Purification of non-metals.
Production of metals.
Natural resources are
Chemicals that are obtained from the industries.
Organic chemicals that are used to prepare a huge range of agricultural products.
Mineral nutrients
