Chemistry Practice Tests 5 - PLS Academy

Chemistry Practice Test 5

Chemistry Practice Test 5 is designed to help students strengthen their understanding of key chemistry concepts, formulas, and reactions for competitive entry tests like MDCAT, NUMS, AKU, UET, ECAT, NTS, as well as FSC Board Exams. This test covers topics from thermodynamics, chemical equilibrium, coordination compounds, and practical applications, helping students improve accuracy and problem-solving skills.

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Chemistry Practice Test 5

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1 / 100

Category: Chemistry Ch 9 Class 12

Alkaline KMnO4 converts ethylene into:

NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:

A) Methanol

B) Ethane

C) Ethanol

D) Ethylene glycol

2 / 100

Category: Chemistry Ch 12 Class 12

Which one of the following is used in making lozenges?

Methanol

Acetaldehyde

Acetone

Formaldehyde

3 / 100

Category: Chemistry Ch 11 Class 11

In general Photochemical reactions are of order

PMC Sample 1
Chemistry
Reaction Kinetics
Elimination Tool:

A) 1

B) 3

C) 2

D) 0

4 / 100

Category: Chemistry Ch 7 Class 12

Formyl group is present in

PMC Sample 1
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Aldehydes

B) ethers

C) thiol

D) acetone

5 / 100

Category: Chemistry Ch 10 Class 11

The oxidation state of “S’ in the (S2O3)-2 is:

PMC 2020
Chemistry
Electrochemistry
Elimination Tool:

A) +4

B) +6

C) -2

D) +2

6 / 100

Category: Chemistry Ch 7 Class 12

How many chain isomers can be obtained from the alkane C6H14?

NTS 2016 DUHS & JSMU
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) 7

B) 6

C) 5

D) 4

7 / 100

Category: Chemistry Ch 10 Class 12

Zwitter ion is formed when proton goes from:

NTS 2018
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Amino to the carboxyl group

B) Carboxyl to an amino group

C) Carboxyl group only

D) Amino group only

8 / 100

Category: Chemistry

By treating CO2 with Grignard’s reagent, the following compound is obtained;

NUMS Mock 2
Chemistry
Carboxylic Acids and its Derivatives

A) Aromatic compounds

B) Alcohols

C) Carboxylic acid

D) Ethers

9 / 100

Category: Chemistry Ch 9 Class 11

In depression of freezing point, freezing constant Is divided by

Molarity

Molality

Molar fraction

All of these

10 / 100

Category: Chemistry Ch 12 Class 12

What type of chemical reaction is this?
CH3CHO + NH3 -> CH3CH(OH)NH2

NUMS 2019 Cancelled
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Addition – elimination

B) Electrophilic addition

C) Free radical addition

D) Nucleophilic addition

11 / 100

Category: Chemistry Ch 5 Class 11

Spectrum of which series is in the UV region?

Lyman serie

Balmer series

Paschen series

Pfund series

12 / 100

Category: Chemistry Ch 7 Class 12

Which one of them is used as an automobile antifreeze

PMC Sample 1
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Ethanol

B) ethene

C) ethylene glycol

D) propene

13 / 100

Category: Chemistry

Q.180 Enzymes speed up the reaction upto

A. 10^10

B. 200^10

C.10^20

D.150^10

14 / 100

Category: Chemistry Ch 9 Class 12

Name the main product formed as a result of the following reaction

H3C – (CH2)5 – CH3 ————> Product

n-heptane

Conditions: 480 – 550 C, 150 – 399 psi V2O5

NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:

A) Benzene

B) Toluene

C) Xylene

D) Cyclohexane

15 / 100

Category: Chemistry Ch 1 Class 11

Different kinds of atoms of the same element are called isotope having different __________but same ___________ properties.

PMC Practice 1
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Physical, atomic

B) Physical, chemical

C) Chemical, physical

D) Chemical, atomic

16 / 100

Category: Chemistry Ch 3 Class 12

Scandium, Sc, is the first of the 3d blocks of elements in the Periodic table.

Which properties of Sc approve the above fact?

NUMS 2019 Cancelled
Chemistry
d and f Block Elements
Elimination Tool:

A) Sc has ionic chloride

B) Sc readily forms oxidation state of +3

C) Compounds containing the Sc3+ion are always colored.

D) Sc has ionic chloride and Sc readily forms oxidation state of +3

17 / 100

Category: Chemistry Ch 9 Class 12

n-Heptane can be converted into benzene by catalysts:

Al203, Si02, Fe203

Si02, K20, Cr203

Al203,Si02, Cr203

None of these

18 / 100

Category: Chemistry Ch 7 Class 11

Which of the following statements is NOT true for the first law of thermodynamics?

NTS 2014
Chemistry
Thermochemistry
Elimination Tool:

A) Total energy of the system and surrounding is conserved

B) Energy can neither be created nor destroyed

C) It is the same as law of conservation of energy

D) Total energy of the system is increasing

19 / 100

Category: Chemistry Ch 12 Class 12

In Cannizzaro’s reaction out of two moles, one makes salt of an acid the other makes

Ester

Alcohol

Carboxylic Acid

Alkane

20 / 100

Category: Chemistry Ch 1 Class 12

Which group of elements shows greatest electrical conductivity?

Alkali metals

Alkaline earth metals

Halogens

Coinage Metals

21 / 100

Category: Chemistry Ch 11 Class 12

Which of the following is an insecticide?

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) DDT

B) Teflon

C) Iodoform

D) Dynamite

22 / 100

Category: Chemistry

Which of the following does not show variable valency?

NUMS Mock 3
Chemistry
Atomic Structure

A) Mn

B) Fe

C) Zn

D) Cr

23 / 100

Category: Chemistry Ch 11 Class 11

The rate of reaction:

NUMS 2020
Chemistry
Reaction Kinetics
Elimination Tool:

A) Increases as the reaction proceeds

B) Decreases as the reaction proceeds

C) Remains the same as the reaction proceeds

D) May decrease or increase as the reaction proceeds

24 / 100

Category: Chemistry Ch 1 Class 12

11) Hydrogen has properties similar to:

Alkali metals

Halogens

Both a and b

None of these

25 / 100

Category: Chemistry Ch 6 Class 11

Which of the following is paramagnetic

Nickle

Vanadium

Uranium

Oxygen

26 / 100

Category: Chemistry Ch 7 Class 11

The thermal energy at constant pressure is called:

PMC 2020
Chemistry
Thermochemistry
Elimination Tool:

A) Enthalpy

B) Internal Energy

C) Heat capacity

D) Work done

27 / 100

Category: Chemistry Ch 1 Class 11

One mole of Oxygen has number of atoms as compared to one mole of Nitrogen

equal

Half

Double

Quarter

28 / 100

Category: Chemistry

Which of the following acts as an electrophile in the electrophilic substitution of benzene with bromine?

NUMS Mock 1
Chemistry
Hydrocarbons

A) Br+

B) FeCl4+

C) Fe2+

D) Fe3+

29 / 100

Category: Chemistry Ch 3 Class 12

Aluminum reacts with H2SO4 to produce

Al2(S04))

SO3

SO2

30 / 100

Category: Chemistry Ch 3 Class 12

) Which one of the following is metalloid?

31 / 100

Category: Chemistry

Q.33 Rate constant is denoted by?

A. k

B. kr

C. kv

D.ks

32 / 100

Category: Chemistry Ch 1 Class 11

In combustion analysis method CO2 is absorbed by?

Mg(OH)2

KOH

Mg(CIO)2

None of thes

33 / 100

Category: Chemistry Ch 7 Class 11

If a system absorbs heat, the surrounding temperature

Increases

Remains same

Decreases

Decreases then suddenly Increases

34 / 100

Category: Chemistry

The indicator is a colored compound?

Organic

Inorganic

Acidic

Basic

35 / 100

Category: Chemistry

The influence of temperature on reaction rate is predicted by:

NUMS Mock 1
Chemistry
Reaction Kinetics

A) Free energy change

B) Van Der Waals equation

C) Arrhenius equation

D) Kinetic equation

36 / 100

Category: Chemistry Ch 8 Class 12

Which of the following compounds possesses a single covalent bond between carbon and hydrogen?

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

A) CH4

B) C2H2

C) C2H4

D) All of the above

37 / 100

Category: Chemistry Ch 9 Class 12

Alkenes undergo:

UHS 2019
Chemistry
Hydrocarbons
Elimination Tool:

A) Electrophilic Addition

B) Electrophilic substitution

C) Nucleophilic substitution

D) Nucleophilic addition

38 / 100

Category: Chemistry Ch 5 Class 11

Which of the following does not show variable valency?

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

A) Mn

B) Fe

C) Zn

D) Cr

39 / 100

Category: Chemistry Ch 3 Class 12

What is the chemical name of SANDUR?

Tetraplumbic oxide

Triplumbic oxide

Triplumbic tetraoxide

Lead dioxide

40 / 100

Category: Chemistry Ch 8 Class 12

Generic formula of cycloalkane is:

PMC 2020
Chemistry
Hydrocarbons
Elimination Tool:

A) CnH2n+2

B) CnH2n

C) CnH2n – 1

D) CnH2n – 2

41 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is branched amino acid?

all of these

42 / 100

Category: Chemistry Ch 7 Class 11

The measurement of heat absorbed or given out in a chemical reaction is referred to as:

NTS 2011
Chemistry
Thermochemistry
Elimination Tool:

A) Enthalpy

B) Endothermic reaction

C) Exothermic reaction

D) Thermochemistry

43 / 100

Category: Chemistry Ch 8 Class 12

IUPAC Nomenclature of:

CH3 – CH = CH – CH2 – CH = CH2 is:

NTS 2011
Chemistry
Hydrocarbons
Elimination Tool:

A) 2 – pentene

B) 1 , 4 – hexadiene

C) 3 – methyl butane

D) 1, 3, 5 – heptatriene

44 / 100

Category: Chemistry

Solid NaCl is a bad conductor of electricity because:

NUMS Mock 2
Chemistry
States of Matter – Gases, Liquids and Solids

A) Solid NaCl is covalent

B) In the solid state, there are no ions

C) In solid NaCl. there is no migration of ions

D) In solid NaCl, there are not electron

45 / 100

Category: Chemistry Ch 1 Class 11

What will be the mass in grams of 12 gram atom of carbon atoms?

12.66 x 10^-24

1.66 x 10^-24

1.992 x 10^-23

2.660 x 10^-23

46 / 100

Category: Chemistry Ch 15 Class 12

Which of the following is the most widely used fertilizer in Pakistan?

Ammonium Nitrate

Ammonia

Calcium Nitrate

Urea

47 / 100

Category: Chemistry Ch 5 Class 11

Shape of the orbital occupied by an electron is defined by:

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

A) Principal quantum number

B) Azimuthal quantum number

C) Spin quantum number

D) Magnetic quantum number

48 / 100

Category: Chemistry Ch 3 Class 12

Chemical formula of powder used in carom board is?

NaHCO3

H3B03

Na2CO3

K2CO3

49 / 100

Category: Chemistry Ch 2 Class 12

Melting point of Group I-A elements is than Group II-A elements

Higher

lower

Same

Varies

50 / 100

Category: Chemistry Ch 1 Class 11

What is the percentage by mass of Nitrogen in NH4(NO3)?

40%

50%

35%

30%

51 / 100

Category: Chemistry

The presence of several fine lines in a line spectrum shows the presence of:

NUMS Mock 3
Chemistry
Atomic Structure

A) Shells

B) Energy levels

C) Sub shells

D) All of these options are correct

52 / 100

Category: Chemistry Ch 2 Class 11

Water and mercury can be separated by:

Evaporation

Sublimation

Filtration

Solvent extraction

53 / 100

Category: Chemistry

Q.147 Plasma “the fourth state of matter was identified by

A. Berzelius

B. William Crooks

C. Dalton

D. Rutherford

54 / 100

Category: Chemistry

Q.129 The biochemical process used in the synthesis of alcohol in the presence of yeast is called as____________________?.

A. Respiration

B. Photosynthesis

C. Fermentation

D. Aerobic respiration

55 / 100

Category: Chemistry Ch 8 Class 11

Which of the following has the highest value of pKa?

NUMS 2019 Reconduct
Chemistry
Chemical Equilibrium
Elimination Tool:

A) CH3- CH2OH

B) CI – CH2- CH2OH

C) F3C – CH2- OH

D) CH3- CH(CH3) – CH2OH

56 / 100

Category: Chemistry Ch 4 Class 11

The variation in physical properties of a crystal due to direction is called

PMC Sample 1
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) isotropy

B) entropy

C) anisotropy

D) none of these

57 / 100

Category: Chemistry Ch 16 Class 12

Which one is correct about Incineration of Industrial waste?

Ash buried in sea water.

Secondary chamber is maintained at temperature range 650 C to 1100 C

Smoke stacks emit oxides of nitrogen and carbo

Solids wastes are the significant sources of dioxins

58 / 100

Category: Chemistry Ch 5 Class 11

Quantum number values for ‘2p’ orbitals are:

PMC 2020
Chemistry
Atomic Structure
Elimination Tool:

A) n=2, l=1

B) n=1, l=2

C) n=1, l=0

D) n=2, l=0

59 / 100

Category: Chemistry

Q.82 The oxidation number of ‘P’ in HPO3 is

A. +3

B. +5

C. +1

D. –3

60 / 100

Category: Chemistry Ch 8 Class 12

Percentage of butane in Sui gas is?

NTS 2015 SMBBMC
Biology
Hydrocarbons
Elimination Tool:

B) 3.88 %

C) 1.05 %

D) 0.02%

E) 0.17 %

61 / 100

Category: Chemistry Ch 15 Class 12

Which of the following is not a macronutrient?

62 / 100

Category: Chemistry Ch 4 Class 12

Which transition metal is used the most in industries?

PMC 2021 Tested
Chemistry
d and f Block Elements
Elimination Tool:

A) Fe

B) Mg

C) Ca

D) C

63 / 100

Category: Chemistry Ch 1 Class 12

Outer transition elements belong to

NTS 2013
Chemistry
Periodicity in Elements
Elimination Tool:

A) s-block

B) p-block

C) d-block

D) f-block

64 / 100

Category: Chemistry

Q.117 The rate of esterification of alcohols is more for

A. (CH3)3 COH

B. CH3 OH

C. C2 H5 OH

D. (CH3)2 CHOH

65 / 100

Category: Chemistry Ch 6 Class 11

How many orbitals intermix in sp hybridization?

66 / 100

Category: Chemistry

Q.79 Salt Bridge is used for the purpose of

A. Producing Electrons

B. Circuit Completion

C. Increasing speed electrons

D. All of these

67 / 100

Category: Chemistry Ch 2 Class 12

Which one of the following statements is true?

NUMS 2016
Chemistry
s and p Block Elements
Elimination Tool:

A) All nitrates of Group II metals are decomposed by heat to give the oxide NO2.

B) Aqueous sodium nitrate in acidic to litmus.

C) Aqueous ammonium nitrate is alkaline to litmus.

D) The alkali metal nitrates are insoluble in water.

68 / 100

Category: Chemistry Ch 1 Class 12

Which of the following has maximum non-metallic character?

PMC Sample 2
Chemistry
Periodicity in Elements
Elimination Tool:

A) F

B) Cl

D) I

C) Br

69 / 100

Category: Chemistry Ch 7 Class 11

The enthalpy change accompanying the gain of an electron by a neutral gaseous atom to form a negative ion is called:

NTS 2010
Chemistry
Thermochemistry
Elimination Tool:

A) Ionization potential

B) Electronegativity

C) Electron affinity

D) Lattice energy

70 / 100

Category: Chemistry Ch 6 Class 11

Sigma bond is formed by:

NTS 2010
Chemistry
Chemical Bonding
Elimination Tool:

A) Transferring the electrons

B) Head-on overlapping of atomic orbitals

C) Mutual but unequal sharing of electrons

D) Parallel overlapping of atomic orbitals

71 / 100

Category: Chemistry Ch 9 Class 11

The vapour pressure of water at room temperature is 23.8 mm Hg. The vapour pressure of an aqueous solution of sucrose with mole fraction 0.2 is equal to:

NUMS 2015
Chemistry
Stoichiometry
Solution and Colloids
Elimination Tool:

A) 19.04 mm Hg

B) 24.2 mm of Hg

C) 21.42 mm of Hg

D) 21.4 mm of Hg

72 / 100

Category: Chemistry Ch 7 Class 12

Na, Ca & Mg are

Organic

Inorganic non-metals

) Inorganic metals

Organic metals

73 / 100

Category: Chemistry Ch 11 Class 11

The colour of methyl orange in base is?

NTS 2015 SMBBMC
Chemistry
Acids, Bases and Salts
Elimination Tool:

A) Red

B) yellow

C) orange

D) pink

74 / 100

Category: Chemistry

Example of a nucleophile is:

NUMS Mock 1
Chemistry
Fundamental Principles of Organic Chemistry

A) BF3

B) AlCl3

C) SO3

D) CN

75 / 100

Category: Chemistry

Q.75 Metallic character depends on.

A. Electron affinity

B. Ionization energy

C. Electronegativity

D. All of these

76 / 100

Category: Chemistry Ch 6 Class 11

Which theory deals with hybridization of orbitals?

VBT

MOT

VSEPR

None of these

77 / 100

Category: Chemistry Ch 1 Class 11

Limiting reactant controls the amount of _.

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Reactant

B) Products

C) Both A&B

D) None of these

78 / 100

Category: Chemistry Ch 9 Class 12

Friedel craft’s reaction gives?

Benzene

Nitrobenzene

Toluene

Alkene

79 / 100

Category: Chemistry Ch 7 Class 12

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Functional isomers

B) Position isomers

C) Chain isomers

D) Metamers

80 / 100

Category: Chemistry Ch 13 Class 12

For preparation of carboxylic acid, alkyl nitrite is required. Alkyl nitrite can be prepared by treating KCN with:

Alkyl halide

Alcohol

Water

Acetaldehyde

81 / 100

Category: Chemistry Ch 13 Class 12

Benzyl acetate gives us which flavour?

NUMS 2019 Cancelled
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Raspberry

B) Pineapple

C) Jasmine

D) Apricot

82 / 100

Category: Chemistry Ch 4 Class 11

Carbon dioxide is an Example of?

PMC Practice 4
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Ionic Solid

B) Metallic Solid

C) Molecular Solid

D) Covalent Solid

83 / 100

Category: Chemistry

Transfer of heat from hot surroundings to a cold refrigerator is an example of:

NUMS Mock 4
Chemistry
Thermochemistry

A) Spontaneous reaction

B) Non-Spontaneous reaction

C) First law of thermodynamics

D) All of the above options are correct

84 / 100

Category: Chemistry Ch 2 Class 12

Densities of alkali metals are low due to:

PMC 2020
Chemistry
s and p Block Elements
Elimination Tool:

A) Weak intermolecular forces

B) Large atomic volume

C) Smaller size

D) Ns1 configuration

85 / 100

Category: Chemistry Ch 11 Class 12

phenol, and ethers are the derivatives of?

Carboxylic acid

Alkenes

Organic derivatives of water

Benzene

86 / 100

Category: Chemistry Ch 12 Class 12

Why is it necessary to distill aldehyde formed from oxidation of primary alcohol through acidified potassium dichromate (VI) solution or acidified sodium dichromate (VI) solution?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Aldehydes and Ketones
Elimination Tool:

A) Aldehyde formed may be oxidized further to carboxylic acid concerned

B) Aldehyde formed is unstable and decompose back to original precursor i.e. primary alcohol

C) Aldehyde may be oxidised further to a ketone

D) Aldehyde formed may react with primary alcohol, the original reactant.

87 / 100

Category: Chemistry Ch 6 Class 11

Which of the following contains the coordinate covalent bond?

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

A) N2H5+

B) BaCl2

C) HCl

D) H2O

88 / 100

Category: Chemistry Ch 14 Class 12

Which of the following is NOT a “raw material” used in the Solvay process?

NTS 2016 SMBBMC
Chemistry
Macromolecules
Elimination Tool:

A) Sodium Chloride

B) Sodium Carbonate

C) Limestone

D) Ammonia gas

89 / 100

Category: Chemistry Ch 11 Class 12

The test used to distinguish among primary, secondary, and tertiary alcohols is:

NUMS 2017
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 2,4 – DNPH test

B) Tollens test

C) Lucas Test

D) Fehling solution test

90 / 100

Category: Chemistry Ch 4 Class 12

Copper reacts with hot concentrated H2SO4 in presence of

Air

Water

Ammonia

Strong heat

91 / 100

Category: Chemistry Ch 8 Class 12

Boiling point of heptane is:

140

160

200

92 / 100

Category: Chemistry

Which of the following shows the Planck’s quantum theory?

NUMS Mock 3
Chemistry
Atomic Structure

A) E = hcv

B) E = c/v

C) E = cv

D) None of these options are correct

93 / 100

Category: Chemistry Ch 12 Class 12

Cyanohydrins can be synthesized from ketones through:

NUMS 2018
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Nucleophilic addition reaction

B) Unimolecular Nucleophilic substitution reaction

C) Electrophilic substitution reaction

D) Bimolecular Nucleophilic substitution reaction

94 / 100

Category: Chemistry Ch 3 Class 11

Solid CO2 dry ice has a structure just like:

NUMS 2014
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Diamond

B) Sulphur

C) Graphite

D) None of the above

95 / 100

Category: Chemistry

The enthalpy change of the reaction

H2(g) + ½ O2 -> H2O (l)

under standard conditions is:

NUMS Mock 1
Chemistry
Thermochemistry

A) Enthalpy change of formation of water

B) Enthalpy change of neutralization

C) Both; Enthalpy change of combustion of Hydrogen and enthalpy change of formation of water

D) Enthalpy change of combustion of Hydrogen

96 / 100

Category: Chemistry Ch 1 Class 11

Chemical properties of an atom depends upon number of

Electron

Neutrons

Protons

Nucleons

97 / 100

Category: Chemistry Ch 7 Class 11

If a graph is plotted between pressure on x- axis and volume on y- axis for Boyle’s law verification, the curve obtained is called

PMC Sample 2
Chemistry
Thermochemistry
Elimination Tool:

A) pseudotherm

B) isotherm

C) biotherm

D) all of these

98 / 100

Category: Chemistry Ch 2 Class 12

Which of the following is least polarizable?

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

A) Ne

B) He

C) X

D) Kr

99 / 100

Category: Chemistry

Which carbohydrate Is soluble in water?

Cellulose

Starch

Amylase

Fructose

100 / 100

Category: Chemistry Ch 3 Class 12

Which of the following does not act as ligand in the formation of complexes?

NUMS 2019 Reconduct
Chemistry
d and f Block Elements
Elimination Tool:

A) CH3NH2

B) OH-

C) Cl-

D) NH4+

Your score is

The average score is 55%

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