Chemistry Practice Tests 3

Created by Ali Durrani

NET Practice

Chemistry Practice Test 3

This is the Free Access to Limited MCQs. Enroll to PLS Boost Premium Bundle to Get More MCQs HERE

1 / 100

Category: Chemistry Ch 7 Class 11

In an adiabatic process:

NUMS 2016
Chemistry
Thermochemistry
Elimination Tool:

A) Pressure is maintained constant

B) The gas is isothermally expanded

C) There is perfect heat insulation

D) System exchanges heat with the surroundings

2 / 100

Category: Chemistry

Strongest acid among the following is:

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

A) HCOOH

B) CH3COOH

C) (CH3)2CHCOOH

D) (CH3)3CCOOH

3 / 100

Category: Chemistry

Reaction of water with quicklime results in the rise in the temperature of the system. Using the concept of an energy change, indicates the nature of the reaction?

NUMS Mock 1
Chemistry
Thermochemistry

A) Endothermic Reaction

B) Non spontaneous Reaction

C) Third Order Reaction

D) Exothermic Reaction

4 / 100

Category: Chemistry Ch 5 Class 11

The difference between soft and hard X-rays is of:

NUMS 2016
Physics
Atomic Structure
Elimination Tool:

A) Velocity

B) Intensity

C) Frequency

D) Polarization

5 / 100

Category: Chemistry Ch 5 Class 12

Bleaching powder is agent?

Oxidizing

Reducing

Both a and b

None of these

6 / 100

Category: Chemistry

Q.18 The increase in size of an anion is due to increase n repulsion of

A. electron-proton

B. electron-electron

C. electron-nucleus

D. proton-nucleus

7 / 100

Category: Chemistry Ch 11 Class 12

Methyl alcohol is used for production of

Dyes

Drugs

Perfumes

Antifreeze

8 / 100

Category: Chemistry Ch 1 Class 12

What is the charge on a hydrogen ion?

1

— 1

+2

-2

9 / 100

Category: Chemistry Ch 4 Class 12

The transition elements belongs to Group VI B are

PMC Practice 6
Chemistry
d and f Block Elements
Elimination Tool:

A) Zn, Cd, Hg

B) Fe, Ru, Os

C) Mn, Te, Re

D) Cr, Mo, W

10 / 100

Category: Chemistry

Which of the following will not undergo aldol condensation?

NUMS Mock 2
Chemistry
Aldehydes and Ketones

A) Acetaldehyde

B) Propanaldehyde

C) Benzaldehyde

D) Trideuteroacetaldehyde

11 / 100

Category: Chemistry Ch 12 Class 12

Oxidation of alcohol converts it into?

Aldehyde

Tertiary Alcohol

Alkane

Carboxylic Acid

12 / 100

Category: Chemistry Ch 4 Class 12

Which of the following is typical transition element?

PMC Practice 4
Chemistry
d and f Block Elements
Elimination Tool:

A) Zn

B) Cd

C) Cu

D) Hg

13 / 100

Category: Chemistry

Q.84 The electron affinity of fluorine is less than chlorine as we move down the group, this deviation in behavior is due to its

A. Small size

B. Seven electron

C. Thick electronic cloud

D. All of these

14 / 100

Category: Chemistry Ch 2 Class 12

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

Higher

lower

Same

Varies

15 / 100

Category: Chemistry Ch 4 Class 12

The shape of [Co(NH3)6]3+ complex is:

UHS 2018
Chemistry
d and f Block Elements
Elimination Tool:

A) Linear

B) Square planar

C) Tetrahedral

D) Octahedral

16 / 100

Category: Chemistry Ch 14 Class 12

Allotropes are of same?

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

A) Compounds

B) Molecules

C) Ions

D) Elements

17 / 100

Category: Chemistry Ch 5 Class 11

The atomic number Z of an atom represents the:

NTS 2018
Physics
Atomic Structure
Elimination Tool:

A) Number of protons

B) Number of electrons and protons

C) Number of neutrons

D) Sum of protons and neutrons

18 / 100

Category: Chemistry Ch 9 Class 11

The reaction in which a molecule is broken down by Water is known as

Hydration

Salvation

Electrolysis

Hydrolysis

19 / 100

Category: Chemistry

Q.84 In BeCl2 the covalent bond is formed due to overlap if

A. sp–s

B. sp–p

C. sp2–p

D. sp3–s

20 / 100

Category: Chemistry Ch 3 Class 11

When gases expand, this causes:

Cooling

Heating

Remain constant

None

21 / 100

Category: Chemistry Ch 8 Class 11

If Kc < 1, then the reaction proceeds:

Forwards

Backwards

Is at Equilibrium

None of these

22 / 100

Category: Chemistry Ch 10 Class 12

How would an ammonium group affect the benzene ring for subsequent reactions?

NTS 2017
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Deactivate the ring; meta directing

B) Activate the ring; ortho-para directing

C) Deactivate the ring; ortho-para directing

D) Activate the ring; meta directing

23 / 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

24 / 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

25 / 100

Category: Chemistry

A single Chloride free radical can destroy ozone molecules up to:

NUMS Mock 1
Chemistry
Enviormental Chemistry

A) 100,000

B) 10,000

C) 100,0000

D) 1000

26 / 100

Category: Chemistry Ch 6 Class 11

The number of sigma and pi bonds in 1-butene-3-yne?

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

A) 5 sigma and 5 pi

B) 7 sigma and 3 pi

C) 8 sigma and 2 pi

D) 6 sigma and 4 pi

27 / 100

Category: Chemistry Ch 9 Class 12

Which one of the following organic compounds have the least carbon-carbon bond length?

NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:

A) Ethene

B) Ethane

C) Ethyne

D) Methane

28 / 100

Category: Chemistry Ch 10 Class 11

Which of the following metals does NOT liberate hydrogen in reaction with acids?

NUMS 2019 Reconduct
Chemistry
Electrochemistry
Elimination Tool:

A) Mg

B) Pt

C) Zn

D) Ca

29 / 100

Category: Chemistry Ch 16 Class 12

Which one of these Is toxic?

Nitrous oxide

Nitric oxide

Sulphur dioxide

Carbon dioxide

30 / 100

Category: Chemistry Ch 11 Class 12

Phenol is a(n) ________ liquid?

PMC Sample 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Dense

B) Hard

C) Deliquescent

D) Intermittent

31 / 100

Category: Chemistry Ch 8 Class 11

By which of the following factors, equilibrium state is attained earlier?

NUMS 2020
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Temperature

B) Pressure

C) Concentration

D) Catalyst

32 / 100

Category: Chemistry

Which enzyme is used when sugar In molasses is converted to glucose and fructose?

Amylase

Protease

Sucrase

None of these

33 / 100

Category: Chemistry Ch 12 Class 12

Meta-formaldehyde molecule has Oxygen MOMS:

One

Two

Three

Five

34 / 100

Category: Chemistry

Q.40 Octane number of n-heptane is____________?

A. 0

B. 100

C.40

D. 98

35 / 100

Category: Chemistry Ch 6 Class 11

The boiling point of water is higher than other hydrides because water molecules can form:

NTS 2018
Chemistry
Chemical Bonding
Elimination Tool:

A) 4 hydrogen bonds

B) 3 hydrogen bonds

C) 2 hydrogen bonds

C) 1 hydrogen bonds

36 / 100

Category: Chemistry

Q.159 An aromatic compound that can obtained from coal tar is

A. Benzene

B. Toluene

C. Phenol

D. Diphenylmethane

37 / 100

Category: Chemistry

Q.97 Due to less polarizability of Fluorine, it boils at ___________C

A..-188.1

B.188.1

C.184.4

D.184.4

38 / 100

Category: Chemistry Ch 7 Class 12

The type of isomerism existing in a compound of molecular formula C2H6O is:

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Functional group

B) Position

C) Chain

D) Metamerism

39 / 100

Category: Chemistry Ch 11 Class 12

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

PreMedPK MDCAT Mock 4
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 2,4 – DNPH test

B) Tollens test

C) Lucas Test

D) Fehling solution test

40 / 100

Category: Chemistry

Phenylmethyl ketone can be converted into ethyl benzene in one step by using:

NUMS Mock 4
Chemistry
Aldehydes and Ketones

A) LiAlH4

B) Zn(Hg)-HCl

C) NaBH4

D) CH3Mgl

41 / 100

Category: Chemistry

When two moles of H2 and one mole of O2 react to form H2O, 484 KJ heat is evolved. What is Δ Hf for one mole of H2O?

NUMS Mock 3
Chemistry
Thermochemistry

A) -484 KJmol-1

B) -242 KJmol-1

C) -121 KJmol-1

D) +242 KJmol-1

42 / 100

Category: Chemistry Ch 9 Class 12

Boiling point of benzene is:

70.3

80.1

133

79.41

43 / 100

Category: Chemistry

Q.72 Isopentane is an example of_

A. Aromatic compounds

B. Branched chain compound

C. Alicyclic compounds

D. None of these

44 / 100

Category: Chemistry

Nitric oxide has how many valence electrons?

NUMS Mock 1
Chemistry
Atomic Structure

A) 10

B) 13

C) 11

D) 12

45 / 100

Category: Chemistry Ch 5 Class 12

Which of the following halogen does not form stable oxyacids?

CI

F

Br

I

46 / 100

Category: Chemistry Ch 4 Class 11

H2 and O2 are diffusing under the same condition how much H2 gas will diffuse?

NUMS 2017
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 4

B) 16

C) 32

D) 0.5

47 / 100

Category: Chemistry Ch 3 Class 12

) Aluminium is agent?

Good oxidizing

Weak reducing

Good reducing

Both oxidizing and reducing agent

48 / 100

Category: Chemistry Ch 8 Class 12

1,4-dimethyl benzene is called as ______.

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

A) Ortho-xylene

B) Para-xylene

C) Para-methyl toluene

D) Meta-methyl toluene

49 / 100

Category: Chemistry Ch 14 Class 12

Adipic acid and Hexamethylene dlamine combine to form?

Nylon-6,6

Epoxy Resin

Polystyrene

Polyvinyl chloride

50 / 100

Category: Chemistry Ch 6 Class 12

What is not true about transition metals?

They can make colored complexes

They have only one valency

They can be used as a catalyst d)

They are d block elements

51 / 100

Category: Chemistry Ch 8 Class 11

In a reaction:

A+B 2C

When equilibrium was attained, the concentration was

[A] = [B] = 4 moles/dm3

[C]= 6 moles/dm3
The equilibrium constant Kc of this reaction is:

NTS 2011
Chemistry
Chemical Equilibrium
Elimination Tool:

A) 1.25

B) 2.25

C) 3.25

D) 2.75

52 / 100

Category: Chemistry Ch 3 Class 12

Valence electronic configuration Cu+2 is (29Cu)

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

A) 5d6

B) 3d9

C) 3d8

D) 3d7

53 / 100

Category: Chemistry

Which derivative of benzene shows maximum reactivity in electrophilic substitution reactions?

NUMS Mock 1
Chemistry
Hydrocarbons

A) Benzoic acid

B) Methyl benzene

C) Benzaldehyde

D) Nitrobenzene

54 / 100

Category: Chemistry

Q.128 Which of the following element is not usually present in all proteins?

A. Carbon

B. Hydrogen

C. Nitrogen

D. Sulphur

55 / 100

Category: Chemistry

Q.97 Due to less polarizability of Fluorine, it boils at ___________C

A..-188.1

B.188.1

C.184.4

D.184.4

56 / 100

Category: Chemistry Ch 1 Class 11

Isotopes are the atoms of same element having different number of _____.

PMC Practice 26
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Electrons

B) Protons

C) Positrons

D) Neutrons

57 / 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

58 / 100

Category: Chemistry Ch 15 Class 12

The crude petroleum is separated in fraction by:

PMC Practice 4
Chemistry
Industrial Chemistry
Elimination Tool:

A) Filtration

B) Fractional distillation

C) Steam distillation

D) Fractional sublimation

59 / 100

Category: Chemistry Ch 1 Class 11

A sample of 0.7 moles of metal ‘M’ reacts completely with an excess of fluorine to form 45 g of MF2. How many moles of F are present in it?

PMC Practice 17
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 1.4 moles

B) 2.4 moles

C) 2 moles

D) 1.2 moles

60 / 100

Category: Chemistry Ch 12 Class 12

Why is water added after the reduction process of aldehyde and ketone with LiAlH4?

NUMS 2019 Cancelled
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Because water reacts violently with LiAlH4

B) Because water will protonate LiAlH4

C) Because water inhibits the process

D) Because it will result to alkenes

61 / 100

Category: Chemistry Ch 1 Class 12

What is a complex/coordination compound?

PMC Sample 1
Chemistry
Periodicity in Elements
Elimination Tool:

A) A compound in which a metal atom or ion is covalently bonded with a group of neutral molecules or anions.

B) A compound that contains 2 or more than 2 different elements

C) A compound which has complex molecular geometry

D) A compound that contains a complex ion and can exist independently

62 / 100

Category: Chemistry Ch 4 Class 12

Ligands having two lone pair of electrons for donation to the central transition metal ion are known as:

UHS 2018
Chemistry
d and f Block Elements
Elimination Tool:

A) Polydentate ligands

B) Monodentate ligand

C) Bidentate ligands

D) Hexadentate ligands

63 / 100

Category: Chemistry

Q.97 Which of the following liquid has boiling point greater than that of water at standard pressure

A. Acetic acid

B. Acetone

C. Ethanol

D. Benzene

64 / 100

Category: Chemistry Ch 6 Class 11

The decreasing order of second ionization energy of K, Ca, Ba is:

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

A) K > Ca > Ba

B) Ca > Ba > K

C) Ba > K > Ca

D) K > Ba > Ca

65 / 100

Category: Chemistry

Q.150 Who attributed the deviation of real gases from ideal behavior?

A. Boyle's law

B. Charles's law

C. Avogadro's law

D. Van der Waals

66 / 100

Category: Chemistry

Q.30 How meta directing groups affect the Electrophilic substitution of benzene ring?

A. Increase electron density at ortho para position

B. Decrease electron density at ortho and para positions

C. Make benzene less reactive

D. Both B and C

67 / 100

Category: Chemistry Ch 6 Class 12

Acidified K2Cr2O7 is also called:

Ceramic acid

Chromic Acid

Dichromate

None of these

68 / 100

Category: Chemistry Ch 12 Class 12

Hybridization of carbon in -CHO group is:

NUMS 2019 Reconduct
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) sp

B) sp2

C) sp3

D) dsp

69 / 100

Category: Chemistry Ch 4 Class 11

Increasing the temperature of a liquid will decrease all except:

Surface tension

Density

Viscosity

Vapor pressure

70 / 100

Category: Chemistry

All of the following substances can act as Lewis acids except:

NUMS Mock 3
Chemistry
Acids, Bases and Salts

A) BF3

B) H+

C) AlCl3

D) H2O

71 / 100

Category: Chemistry

The potential difference of an electrochemical cell is measured by:

NUMS Mock 2
Chemistry
Electrochemistry

A) Ammeter

B) Voltmeter

C) Galvanometer

D) Calorimeter

72 / 100

Category: Chemistry Ch 7 Class 12

An essential condition for the Optical Activity of an organic compound is:

NUMS 2015
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Dextrorotatory

B) Levorotatory

C) Presence of an asymmetric carbon

D) Molecular dysymmetry

73 / 100

Category: Chemistry Ch 2 Class 12

The lower part of the “Solvay tower” has been cooled during the manufacture of soda ash because:

NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:

A) this facilitates the production of soda ash

B) it decreases the solubility of Na2CO3

C) this controls the flow of brine

D) it decreases the solubility of NaHCO3

74 / 100

Category: Chemistry Ch 9 Class 11

An azeotropic mixture of two liquids has a boiling point higher than either of them when it:

NUMS 2016
Chemistry
Solution and Colloids
Elimination Tool:

A) Shows positive deviation from Raoult’s law

B) Shows negative deviation from Raoult’s law

C) Shows ideal behaviour

D) Is saturated

75 / 100

Category: Chemistry Ch 11 Class 11

A certain chemical reaction follows the
following rate law:

Rate =K [A] [B]2 The order of reaction is:

NTS 2011
Chemistry
Reaction Kinetics
Elimination Tool:

A) 1

B) 2

C) 3

D) 4

76 / 100

Category: Chemistry Ch 9 Class 12

Friedel craft’s reaction gives?

Benzene

Nitrobenzene

Toluene

Alkene

77 / 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

78 / 100

Category: Chemistry Ch 13 Class 12

) Acetic acid is used in making

Leather shoes

Rubber shoes

Plastic shoe

None of thes

79 / 100

Category: Chemistry Ch 9 Class 11

Elevation of the boiling point is a ____ property.

PMC 2021 Tested
Chemistry
Solution and Colloids
Elimination Tool:

A) Colligative

B) None of these

C) Constitutive

D) Additive

80 / 100

Category: Chemistry

Q.136 SN reactions are favored by which of the following reactions?

A. Water

B. Benzene

C. Carbon Tetrachloride

D. Carbon disulphide

81 / 100

Category: Chemistry

An ionic compound is most likely to be formed when:

NUMS Mock 1
Chemistry
Chemical Bonding

A) Ionization energy of A is high but electron affinity of B is low

B) The ionization energy of A is low but electron affinity of B is high

C) Both ionization energy of A and electron affinity of B are high

D) Both ionization energy of A and electron affinity of B are low

82 / 100

Category: Chemistry

Which of the following gas, when ignited, burns with a blue flame and is not very soluble in water?

NUMS Mock 4
Chemistry
s and p Block Elements
Environmental Chemistry

A) O2

B) CO2

C) N2

D) He

83 / 100

Category: Chemistry Ch 11 Class 12

Methylated spirit Is % methanol and % ethanol:

5 and 95

20 and 80

60 and 40

50 and 50

84 / 100

Category: Chemistry

Q.70 Which one of the following is an electrophile?

A. Br

B.CH4

C. NH3

D. H2O

85 / 100

Category: Chemistry

Who discovered positive rays (also called protons) and when?

NUMS Mock 4
Atomic Structure

A) Chadwick,1895

B) Goldstein,1886

C) Rutherford,1885

D) J.Perrin,1885

86 / 100

Category: Chemistry Ch 8 Class 12

Which step should be repeated over and over to get a variety of substituted products?

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

A) None of these

B) Termination

C) Propagation

D) Initiation

87 / 100

Category: Chemistry Ch 1 Class 12

Arrange the following according to increasing ionization energy: Li, Be, Na, Mg

NUMS 2019 Cancelled
Chemistry
Periodicity in Elements
Elimination Tool:

A) Li < Be < Na < Mg

B) Be < Li < Na < Mg

C) Mg < Na < Li < Br

D) Na < Li < Mg < Be

88 / 100

Category: Chemistry Ch 14 Class 12

Fe’ 2 + is a cofactor of:

Chrome oxidase

Glucose 6-phosphatase

Carbonic anhydrase

Both a and b

89 / 100

Category: Chemistry Ch 7 Class 11

Which enthalpy change is relevant in the following process

Na(s) -> Na (g) ΔH = +107

UHS 2019
Chemistry
Thermochemistry
Elimination Tool:

A) Enthalpy of atomization

B) Enthalpy of fusion

C) Enthalpy of vaporization

D) Enthalpy of formation

90 / 100

Category: Chemistry Ch 10 Class 12

atalyst used in the preparation of alkyl halide from alcohol

Platinum/charcoal

LiH4

Rock salt

ZnCl2

91 / 100

Category: Chemistry Ch 7 Class 11

The net heat change in a chemical reaction is the same whether it is brought about in two or more different ways in one or several steps. This is known as:

NTS 2019
Chemistry
Thermochemistry
Elimination Tool:

A) Henry's law

B) Hess's law.

C) Joule's principle

D) Dalton's law

92 / 100

Category: Chemistry Ch 11 Class 11

Sum of all the exponents of the molar concentration of the reactant present in the rate equation is known as:

NTS 2012
Chemistry
Reaction Kinetics
Elimination Tool:

A) Molecularity

B) Order of reaction

C) Rate of reaction

D) gradient

93 / 100

Category: Chemistry

If any amino acids contain greater number of NH2, it is:

NUMS Mock 3
Chemistry
Alkyl Halides and Amines

A) Acidic

B) Neutral

C) Amphoteric

D) Basic

94 / 100

Category: Chemistry

The valency of an atom will be one if there is a sufficient gap between first and second ____.

NUMS Mock 1
Chemistry
Chemical Bonding

A) Electron affinity

B) Ionization energy

C) Electronegativity

D) None of these options are correct

95 / 100

Category: Chemistry Ch 13 Class 12

Which of the following acid solutions is used for the seasoning of food?

PMC Practice 3
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Butyric acid

B) Phthalic acid

C) Lactic acid

D) Acetic acid

96 / 100

Category: Chemistry Ch 12 Class 12

A diabetic person’s exhaled breath contains propanone. A student tries to test the diabetes by asking the person to bubble the reagent with his exhaled breath. Which of the following reagents would give a positive result?

PreMedPK MDCAT Mock 5
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Aqueous Bromine

B) Fehling’s reagent

C) Tollen’s reagent

D) Alkaline aqueous iodine

97 / 100

Category: Chemistry Ch 13 Class 12

Which of the following carboxylic acids is used in medicine as a local irritant?

PMC Practice 2
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Formic acid

B) Acetic acid

C) Benzoic acid

D) Amino acid

98 / 100

Category: Chemistry Ch 5 Class 11

The radius of the third Bohr orbit is:

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

A) 0.529 Å

B) 0.529 / 4 Å

C) 0.529 x 2 Å

D) 0.529 x 32 Å

99 / 100

Category: Chemistry

Q.20 The order of reaction for which hall-life is inversely proportional to the concentration of reaction is

A. Second Order

B. Zero Order

C. First Order

D. Third Order

100 / 100

Category: Chemistry

Copper is a typical transition metal. Its atomic number is 29. In which oxidation state does it have a partially filled orbital in d-subshell?

NUMS Mock 2
Chemistry
d and f Block Elements

A) Cu

B) Cu+

C) Cu-

D) Cu2+

Your score is

The average score is 56%

0%

PLS Academy – LearnoSpot

PLS Boost Bundle