Chemistry Practice Tests 5

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Chemistry Practice Test 5

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1 / 100

Category: Chemistry Ch 4 Class 12

H2SO4 is used in industries of?

Paint

Textile

Rubber

Aluminum

2 / 100

Category: Chemistry Ch 1 Class 11

An atom is composed of electrons, protons, neutrons and ___.

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Hyperon

B) Neutrino

C) Anti-neutrino

D) All of these options are correct

3 / 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

4 / 100

Category: Chemistry Ch 9 Class 12

PolymerizatIon of ______ produces synthetic rubber.

PMC Sample 1
Chemistry
Hydrocarbons
Elimination Tool:

A) Formaldehyde

B) Choloropropene

C) Chloroform

D) Vinyl bromide

5 / 100

Category: Chemistry Ch 1 Class 11

The number of neutrons in H2SO4 are ____.

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

A) 5

B) 49

C) 48

D) 44

6 / 100

Category: Chemistry

Q.121 Ka (Cu(CN)4) which one is correct

A. Potassium tetra cyano recuperate

B. Coordination numbers 2

C The ligand is positively charged

D.Central atom is present in the avionic sphere

7 / 100

Category: Chemistry

Q.154 Fractions of Crude petroleum can be obtained by using

A. Destructive distillation

B. Fractional distillation

C. Vacuum distillation

D. Distillation

8 / 100

Category: Chemistry Ch 1 Class 12

6th period of periodic table contains elements:

26

21

32

7

9 / 100

Category: Chemistry Ch 10 Class 11

The process in which electric current is used to carry out a non-spontaneous redox reaction is called:

NTS 2017
Chemistry
Electrochemistry
Elimination Tool:

A) Electrolyte

B) Electrolysis

C) Metallic conductor

D) None of the above

10 / 100

Category: Chemistry Ch 3 Class 12

Which one of the following ions exhibits d-d transition and paramagnetism as well?

NTS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) MnO4-

B) CrO42-

C) MnO42-

D) Cr2O72-

11 / 100

Category: Chemistry

Q.83 Alcohol oxidation gives carboxylic acid through

A. Amide

B. Carbonic acid

C. Ketone

D. Aldehyde

12 / 100

Category: Chemistry

Which of the following has the highest electrical conductivity?

NUMS Mock 2
Chemistry
Solution and Colloids

A) Aqueous sugar solution

B) Solid graphite

C) Solid sodium chloride

D) Gaseous carbon dioxide

13 / 100

Category: Chemistry Ch 13 Class 12

Which one is the carbonyl protecting group?

Carboxylic acid

Ester

Alcohol

Amino Derivatives

14 / 100

Category: Chemistry

Enthalpy of a compound is equal to its

NUMS Mock 2
Chemistry
Thermochemistry

A) Heat of combustion

B) Heat of formation

C) Heat of solution

D) Heat of dilution

15 / 100

Category: Chemistry Ch 1 Class 12

Which of the following has the highest ionization energy?

NUMS 2019 Cancelled
Chemistry
Periodicity in Elements
Elimination Tool:

A) Al

B) S

C) Si

D) P

16 / 100

Category: Chemistry Ch 9 Class 11

The compound with more than 10% solubility in pure water is:

ETEA 2018
Chemistry
Solution and Colloids
Elimination Tool:

A) M???3

B) A?2(??3)3

C) K2??3

D) ????3

17 / 100

Category: Chemistry

Q.28 Fuels with higher octane number can be produce by_________?

A. Cracking

B. Reforming

C. Decomposition

D. Isomerisation

18 / 100

Category: Chemistry Ch 1 Class 12

Maximum ionization potential is of:

NUMS 2014
Chemistry
Periodicity in Elements
Elimination Tool:

A) Ca

B) Na

C) Be

D) Mg

19 / 100

Category: Chemistry Ch 2 Class 12

The ionization of Hydrogen atom gives:

NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:

A) hydride ion

B) hydronium ion

C) proton

D) hydroxyl ion

20 / 100

Category: Chemistry Ch 11 Class 11

Which of the following statements is correct?

NTS 2017
Chemistry
Acids, Bases and Salts
Elimination Tool:

A) H3PO3 is dibasic and reducing

B) H3PO3 is tribasic and reducing

C) H3PO3 is tribasic and non-reducing

D) H3PO3 is dibasic and non-reducing

21 / 100

Category: Chemistry

Q.176 Quantum number values for 2p orbítals are

A. n=2,l=1

B. n= 1.l=2

C. n =1,1l=0

D. n=2,l=2

22 / 100

Category: Chemistry Ch 10 Class 12

When Grignard reagent reacts with 1120, which of the following is formed

Parent alkane

Alkyl halide c

Alcohol

All are possible

23 / 100

Category: Chemistry Ch 11 Class 12

The method which is used on an industrial scale for production of alcohol from alkene is:

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

A) Hydrohalogenation of alkenes

B) Dehydration of alkenes

C) Hydration of alkenes

D) Hydroxylation of alkenes

24 / 100

Category: Chemistry Ch 15 Class 12

Which in not woody raw material

Poplar

) Hard wood

Fir

Rag

25 / 100

Category: Chemistry Ch 8 Class 11

Which of the following reaction has greater Kp than Kc?

PMC 2020
Chemistry
Chemical Equilibrium
Elimination Tool:

A) 2NO + Cl2 2NOCl

B) 2SO2 + O2 2SO3

C) 2NOCl 2NO + Cl2

D) N2 + 3H2 2NH3

26 / 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

27 / 100

Category: Chemistry Ch 11 Class 11

For the reaction, A(g) -> products:

When the concentration of A(g) doubles, the rate of reaction increases four folds, which means it is:

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

A) Negative order reaction

B) First order reaction

C) Zero order reaction

D) Second order reaction

28 / 100

Category: Chemistry Ch 14 Class 12

Chlorine is manufactured commercially by the electrolysis of aqueous sodium chloride (brine). Which other products are made in this process?

NTS 2010
Chemistry
Macromolecules
Elimination Tool:

A) Hydrochloric acid and hydrogen

B) Hydrogen and sodium

C) Hydrogen and sodium hydroxide

D) Sodium and sodium hydroxide

29 / 100

Category: Chemistry Ch 10 Class 12

An SN2 reaction at an asymmetric carbon of a compound always gives:

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) An metamerism of the substrate

B) A product with opposite optical rotation

C) A mixture of diastereomers

D) A single stereoisomer

30 / 100

Category: Chemistry Ch 9 Class 11

At 25 C, the equivalent conductance at infinite dilution of HCl solution is 425 ohm 1 cm 2 Equiv 1 while its specific conductance is 3.825 ohm 1 cm 1. If the apparent degree of dissociation is 90%, the normality of the solution is:

NUMS 2016
Chemistry
Solution and Colloids
Elimination Tool:

A) 0.9 N

B) 1.0 N

C) 1.1 N

D) 1.2 N

31 / 100

Category: Chemistry Ch 8 Class 12

Which one of the following is saturated hydrocarbon?

Octane

Nonane

Decane

All of the above

32 / 100

Category: Chemistry Ch 14 Class 12

Which of the following is not a disaccharide?

Sucrose

Lactose

Raffinose

Dextrin

33 / 100

Category: Chemistry Ch 1 Class 12

Metals usually produce hydrogen gas with acids. Which of the following produces hydrogen gas with NaOH?

Zn

Cu

Al

Ni

34 / 100

Category: Chemistry Ch 1 Class 12

What are the products of the below-mentioned equation?

HNO3 +3HCI→

NTS 2019
Chemistry
Periodicity in Elements
Elimination Tool:

A) 2H2O + NOCI+Cl2

B) H2 + NOCI+ 2HOCI

C) H2O+ NOCI+ 2HCl

D) 2H2O+NOCI+ 2Cl

35 / 100

Category: Chemistry Ch 2 Class 11

C12H22O11+ conc. H2SO4—> 12 C + ? + H2SO4

NTS 2016 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

A) 11 H2O

B) 11 O2

D) 11 H2

C) 11 CO2

36 / 100

Category: Chemistry

The bond, which is based on attractive forces between oppositely charged ions, is:

NUMS Mock 1
Chemistry
Chemical Bonding

A) Covalent bond

B) Dative bond

C) Ionic bond

D) Metallic bond

37 / 100

Category: Chemistry Ch 10 Class 11

Zn can be deposited on iron by?

Galvanizing

Cathode Coating

Neutral suspension

All of these

38 / 100

Category: Chemistry Ch 11 Class 12

Alkyl groups In ethers are connected by?

An oxygen atom

A carbon atom

A nitrogen atom

A benzene ring

39 / 100

Category: Chemistry

Q.111 Evaporation is a process?

A. Exothermic

B. Spontaneous

C. Non-Spontaneous

D. None of these

40 / 100

Category: Chemistry Ch 11 Class 11

In a reversible reaction, catalyst lowers the action energy of the:

NUMS 2020
Chemistry
Reaction Kinetics
Chemical Equilibrium
Elimination Tool:

A) Forward reaction

B) Reverse reaction

C) Forward as well as reverse reaction

D) Forward reaction but increases that of the reverse reaction

41 / 100

Category: Chemistry

Maleic Acid and Fumaric Acid are:

NUMS Mock 3
Chemistry
Fundamental Principles of Organic Chemistry

A) Cis-Trans isomers

B) chain isomers

C) position isomers

D) metamers

42 / 100

Category: Chemistry Ch 12 Class 12

Identify the common name of the following compound:

CH₃CH₂COCH₂OH

PreMedPK MDCAT Mock 1
Chemistry
Aldehydes and Ketones
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Α-hydroxy-ethyl methyl aldehyde

B) Α-hydroxy-ethyl methyl ketone

C) Β-hydroxy-ethyl methyl ketone

D) Β-hydroxy-ethyl methyl ketone

43 / 100

Category: Chemistry Ch 11 Class 12

Phenol has all characters except?

Can be reduced to benzene

Insoluble in water

Acidic in nature

Used as a disinfectant

44 / 100

Category: Chemistry Ch 7 Class 12

Wohler prepared urea from:

Bakelite

Cyanic acid

NH4CNO

Formaldehyde

45 / 100

Category: Chemistry Ch 9 Class 12

What is the color of silver acetylide, AgC=CAg?

PMC Practice 2
Chemistry
Hydrocarbons
Elimination Tool:

A) Red

B) White

C) Brown

D) Pinkish

46 / 100

Category: Chemistry Ch 14 Class 12

Purification of bauxite whose major impurity Is silica (SiO2) is carried out through:

NTS 2010
Chemistry
Macromolecules
Elimination Tool:

A) Baeyer’s Method

B) Hall’s Method

C) Serpek’s Method

D) Contact Method

47 / 100

Category: Chemistry Ch 1 Class 11

Mass spectrometer is used to determine which of the following quantity?

) Atomic mases

Atomic number

Both a and b

None of these

48 / 100

Category: Chemistry Ch 15 Class 12

Fractions of crude petroleum can be obtained by using ___________.

PMC Practice 3
Chemistry
Industrial Chemistry
Elimination Tool:

A) Destructive distillation

B) Fractional distillation

C) Vacuum distillation

D) Distillation

49 / 100

Category: Chemistry Ch 1 Class 12

The formula of washing soda is:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool:

A) N2CO3

B) Na2CO3 . H2O

C) Na2CO3 . 7H2O

D) Na2CO3 . 10 H2O

50 / 100

Category: Chemistry

Alkenes undergo:

NUMS Mock 2
Chemistry
Hydrocarbons

A) Electrophilic Addition

B) Electrophilic substitution

C) Nucleophilic substitution

D) Nucleophilic addition

51 / 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

52 / 100

Category: Chemistry Ch 3 Class 12

Chemical formula of powder used in carom board is?

NaHCO3

H3B03

Na2CO3

K2CO3

53 / 100

Category: Chemistry Ch 16 Class 12

Function of ozone Is?

To filter UV radiations

Act as a reducing agent

Act as an antibiotic

None of these

54 / 100

Category: Chemistry Ch 8 Class 11

a

b

c

d

55 / 100

Category: Chemistry Ch 15 Class 12

The suspected liver carcinogen which also has negative reproduction and developmental effect on humans is:

UHS 2011
Chemistry
Environmental Chemistry
Elimination Tool:

A) Iodoform

B) Bromoform

C) Tropoform

D) Chloroform

56 / 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

57 / 100

Category: Chemistry Ch 11 Class 12

Boiling point of C2H5OH is high than phenol because:

Of Its stability

Presence of intermolecular H-bond

Both a & b

Its flammable

58 / 100

Category: Chemistry Ch 15 Class 12

1 calorie = ______ Joules.

NTS 2012
Chemistry
Chemistry of Life
Elimination Tool:

A) 200 Joules

B) 2000 Joules

C) 4.184 Joules

D) 4180 Joules

59 / 100

Category: Chemistry

Q.40 Octane number of n-heptane is____________?

A. 0

B. 100

C.40

D. 98

60 / 100

Category: Chemistry Ch 10 Class 11

Oxidation number of particular element can be directly or indirectly inferred from its:

UHS 2019
Chemistry
Electrochemistry
Elimination Tool:

A) Group number

B) Atomic size

C) Atomic mass

D) Physical state

61 / 100

Category: Chemistry Ch 14 Class 12

) Plastic cannot be recycled by

Depolymerization

Transformation

Deformation

None of these

62 / 100

Category: Chemistry Ch 16 Class 12

Global scale SO2 is produced by

Combustion

Fossil fuels

Volcano

None of these

63 / 100

Category: Chemistry Ch 2 Class 12

Sodium Is prepared by

Down's cell

Dutch's method

Castner-kellner process

Nelson's process

64 / 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

65 / 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

66 / 100

Category: Chemistry Ch 5 Class 11

How many electrons can have the values n=2, l=1, and s=+½ in the configuration 1s2, 2s2, 2p3?

NTS 2015 DUHS and JSMU
Chemistry
Atomic Structure
Elimination Tool:

A) 1

B) 3

C) 5

D) 7

67 / 100

Category: Chemistry Ch 4 Class 12

Paramagnetic elements contain:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) All paired electrons

B) All unpaired electrons

C) Few unpaired electrons.

D) Unequal electrons and protons

68 / 100

Category: Chemistry

Free Nitrogen and Oxygen are present in atmosphere but they do not react with each other under normal conditions because:

NUMS Mock 3
Chemistry

A) Nitrogen requires a catalyst

B) Oxygen is very inactive

C) Oxygen is found in less concentration

D) Nitrogen is highly inactive gas

69 / 100

Category: Chemistry Ch 8 Class 12

In alkanes all carbon atoms are linked by bond

Triple

Single

Double bonds

Alternative

70 / 100

Category: Chemistry Ch 3 Class 11

CO2 and SO2 both are tri-atomic molecules but heat of vaporization of SO2 is greater than that of CO2 due to:

PMC 2020
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) High electronegativity of S

B) Greater size of SO2

C) SO2 is polar and CO2 is non-polar

D) SO2 is more acidic than CO2

71 / 100

Category: Chemistry Ch 13 Class 12

Solubility of carboxylic acids in water decrease with

Decrease in molecular mass

Increase in molecular mass

Both a and b

None of these

72 / 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

73 / 100

Category: Chemistry Ch 6 Class 11

Which of the following has maximum Hydration power?

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

A) Na+

B) K+

C) Be2+

D) Ca+2

74 / 100

Category: Chemistry

The average atomic mass of Boron is 10.8. It has two isotopes of masses 10 and 11 respectively. What is the percentage of isotope with the average mass of 10?

NUMS Mock 4
Chemistry
Stoichiometry

A) 20%

B) 60%

C) 80%

D) 50%

75 / 100

Category: Chemistry Ch 15 Class 12

Photochemical smog is primarily caused by

ETEA 2019
Chemistry
Environmental Chemistry
Elimination Tool:

A) O3

B) NO2

C) SO3

D) CO2

76 / 100

Category: Chemistry Ch 5 Class 11

“In an atom no two electrons can have the some set of four Quantum numbers” is stated by:

NTS 2013
Chemistry
Atomic Structure
Elimination Tool:

A) Heisenberg’s uncertainty principle

B) Aufbau Principle

C) Pauli's Exclusion principle

D) Hund's Rule

77 / 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

78 / 100

Category: Chemistry Ch 5 Class 11

Electronic configuration of M2+ ion is 2, 8, 14 and its atomic weight is 56 amu. The number of neutrons in its nucleus are:

NTS 2017
Chemistry
Atomic Structure
Elimination Tool:

A) 30

B) 32

C) 42

D) 52

79 / 100

Category: Chemistry Ch 12 Class 12

Which of the following does not give iodoform test?

NUMS 2014
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Ethanol

B) Ethanal

C) Acetophenone

D) Benzophenone

80 / 100

Category: Chemistry

Q.14 Kinetic Energy is the sum of

A. Rotational & Vibrational

B. Translation & Rotational

C. Rotational, Vibrational and Translation

D. All of these

81 / 100

Category: Chemistry

Which of the following has maximum Hydration power?

NUMS Mock 3
Chemistry
Chemical Bonding

A) Na+

B) K+

C) Be2+

D) Ca+2

82 / 100

Category: Chemistry

Q.95 Wholar first time prepare urea in laboratory in ?

A. 1900

B. 1829

C. 1850

D. 1828

83 / 100

Category: Chemistry Ch 7 Class 11

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

NUMS 2014
Chemistry
Thermochemistry
Elimination Tool:

A) Spontaneous reaction

B) Non-Spontaneous reaction

C) First law of thermodynamics

D) All of the above options are correct

84 / 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

85 / 100

Category: Chemistry Ch 3 Class 12

What is the chemical name of SANDUR?

Tetraplumbic oxide

Triplumbic oxide

Triplumbic tetraoxide

Lead dioxide

86 / 100

Category: Chemistry Ch 11 Class 12

When an electrophilic reagent attacks on alcohol, ________.

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

A) O – H bond formed.

B) O – H bond breaks.

C) C – O bond breaks.

D) Rise in boiling point.

87 / 100

Category: Chemistry Ch 9 Class 12

Who rejected vital force theory

PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:

A) Wohler

B) Berzelius

C) Wallus

D) Lyll

88 / 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

89 / 100

Category: Chemistry Ch 1 Class 11

Chemical equations do not tell about the ______ because of certain limitations.

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) rate of reaction

B) pressure

C) conditions

D) Both A & C

90 / 100

Category: Chemistry

Q.79 Born-Haber cycle is used to determine the

A. Lattice energy

B. Enthalpy of formation

C. Enthalpy of ionization

D.

91 / 100

Category: Chemistry Ch 13 Class 12

The reaction CHCH + H2O + 3(O) shows the formation of ________.

NUMS 2018
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Acetic acid

B) Picric acid

C) Oxalic acid

D) Formic acid

92 / 100

Category: Chemistry

Q.94 Which of the following spherical subshell for valance electrons

A. B

B. He

C. N

D. C

93 / 100

Category: Chemistry Ch 8 Class 12

In Alkenes the Carbon atoms are connected to each other by a

Single bond

Double bond

Triple bond

Not connected

94 / 100

Category: Chemistry Ch 6 Class 11

Which of the following is paramagnetic

Nickle

Vanadium

Uranium

Oxygen

95 / 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

96 / 100

Category: Chemistry Ch 14 Class 12

Which one of the following compounds is an additional polymer?

UHS 2019
Chemistry
Macromolecules
Elimination Tool:

A) Polyvinyl chloride

B) Nylon

C) Carbohydrate

D) Polyester

97 / 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

98 / 100

Category: Chemistry

Q.106 +G108 The Markownikof’s rule is applicable only on

A. 2-Butene

B. 2-Bromo-3-chloro-2-butene

C. 2,3-Dimethyl-2-butene

D. 2-Methyl-2-butene

99 / 100

Category: Chemistry Ch 4 Class 11

What does the constant ‘n’ represent in the equation of state for an ideal gas PV = nRT?

PMC Practice 5
Physics
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Number of atoms in the gas

B) Number of moles of the gas

C) Number of nucleons

D) Number of molecules of gas

100 / 100

Category: Chemistry Ch 14 Class 12

Ethylene is a monomer of polyethylene that is widely used as raw material for manufacturing plastics. It can be polymerized into two different classes: HDPE and LDPE. The following choices are the differences of HDPE and LDPE except:

NUMS 2019 Cancelled
Chemistry
Macromolecules
Elimination Tool:

A) The density

B) The branching of ethylene

C) Reaction conditions

D) Type of polymerization