Chemistry Practice Tests 5

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Chemistry Practice Test 5

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1 / 100

Category: Chemistry Ch 7 Class 11

Cl + e —-> Cl-

ΔH = -348kJ/mol

The value -348KJ/mol in this case will be:

NTS 2012
Chemistry
Thermochemistry
Elimination Tool:

A) Ionization energy

B) Electronegativity

C) Electron affinity

D) Entropy

2 / 100

Category: Chemistry Ch 9 Class 12

Friedel-Crafts Reaction can be used for the preparation of :

Toluene

Benzene

Phenol

pABA

3 / 100

Category: Chemistry Ch 13 Class 12

Which of the following carboxylic acids will be the most acidic?

NUMS 2016
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) CH3CHClCH2COOH

B) CH3CH2CCl2COOH

C) CH3CH2CHClCOOH

D) CH3CH2CH2COOH

4 / 100

Category: Chemistry Ch 13 Class 12

Carboxylic acids are formed by the hydrolysis of ________.

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

A) Ester & Nitriles

B) Nitriles & Amines

C) Alkenes & Alkynes

D) Esters & Alcohols

5 / 100

Category: Chemistry Ch 12 Class 12

Butanone on oxidation with K2Cr2O7 / H2SO4 forms:

NUMS 2020
Chemistry
Aldehydes and Ketones
Elimination Tool:

A) Acetic acid

B) Acetic acid & Ethane

C) Methane & Propanoic acid

D) Propanoic acid & Methanoic acid

6 / 100

Category: Chemistry Ch 2 Class 11

How will you separate water and kerosene oil?

Distillation

Filtration

Sublimation

Crystallization

7 / 100

Category: Chemistry

The essential property of a fertilizer is that is should be:

NUMS Mock 1
Chemistry
Environmental Chemistry

A) Immiscible

B) Highly soluble

C) Insoluble

D) Partially soluble

8 / 100

Category: Chemistry Ch 6 Class 11

Which of the following has a lone pair of electrons on the central atom?

PCI3

NH4

PCI

CH4

9 / 100

Category: Chemistry

Which one of the following reagents is used to distinguish between aldehydes and ketones?

NUMS Mock 1
Chemistry
Aldehydes and Ketones

A) Alkaline Iodine

B) Tollen’s Reagent

C) Bromine

D) 2, 4 DNPH

10 / 100

Category: Chemistry Ch 9 Class 11

Which one is the correct formula for molar mass of solute In case of boiling point elevation? x

M2= 1000 Kb W2M1/ Tb W1

) M2= 1000 Kb W2/ Tb

M2 = Kb W1 Tb/1000

M2 =1000 Tb W21 Kb

11 / 100

Category: Chemistry

Q.160 Polymerization of ethene produces which of the followving polymer?

A. Polyvinyl

B. Polethyl

C. Polyethylene

D. Polyethoxy

12 / 100

Category: Chemistry Ch 4 Class 11

The nature of Binding Force in Ionic Crystals is

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

A) Magnetic

B) Repulsive

C) Electrostatic

D) Weak

13 / 100

Category: Chemistry Ch 10 Class 11

Zn can be deposited on iron by?

Galvanizing

Cathode Coating

Neutral suspension

All of these

14 / 100

Category: Chemistry

Commercial hydrogen can be obtained by the action of steam on:

NUMS Mock 3
Chemistry
s and p Block Elements

A) Marsh gas

B) Coal gas

C) Producer gas

D) None of these

15 / 100

Category: Chemistry Ch 3 Class 11

Gases behave ideal at

Low pressure and High temperature

low pressure and Low temperature

High temperature and Low pressure

High temperature and High pressure

16 / 100

Category: Chemistry

Carboxylic acids can be reduced to corresponding alcohols. Which of the following reagent can be used for this purpose?

NUMS Mock 2
Chemistry
Carboxylic Acids and its Derivatives

A) KMnO4

B) LiAlH4

C) K2Cr2O4

D) H2SO4

17 / 100

Category: Chemistry Ch 11 Class 12

Which of the following process is not use for the preparation of alcohol?

Reaction of alkyl halide with Grignard reagent

Hydration of alkene

Reaction of Grignard reagent from aldehyde

From water gas

18 / 100

Category: Chemistry Ch 1 Class 11

What is the mass of 10^-3 moles of MgSO4?

120 gram

12 grams

1.2 grams

0.12 gram

19 / 100

Category: Chemistry Ch 10 Class 12

The reduction of nitrile produced a compound of formula C3H7NH2. Which one of the following compounds would be produced if the same nitrile was hydrolyzed by heating with dilute hydrochloric acid?

NUMS 2016
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) CH3CONH2

B) CH3CH2NH2

C) (CH3)2CHCO2H

D) CH3CH2CO2H

20 / 100

Category: Chemistry Ch 6 Class 11

Ionization energy depends upon:

Nuclear charge

Shielding effect

Atomic radius

All of the above

21 / 100

Category: Chemistry Ch 13 Class 12

Vinegar is basically acid:

Acetic

Citrus

Formic

Butyric

22 / 100

Category: Chemistry Ch 10 Class 11

The electrolyte used in fuel cell is:

NUMS 2019 Reconduct
Chemistry
Electrochemistry
Elimination Tool:

A) KOH

B) NaCl (aq)

C) NaNO3

D) Molten NaCl

23 / 100

Category: Chemistry Ch 8 Class 11

1.8 x 10 -5 is the dissociation constant of:

NTS 2016 SMBBMC
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Formic acid

B) Acetic acid

C) Chloroacetic acid

D) Hydrocyanic acid

24 / 100

Category: Chemistry Ch 11 Class 11

Instantaneous rate of reaction is the rate at any

PMC Sample 2
Chemistry
Reaction Kinetics
Elimination Tool:

A) At Equilibrium

B) one instant

C) Given Temperature

D) Given Pressure

25 / 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

26 / 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

27 / 100

Category: Chemistry Ch 9 Class 12

Acetylene polymerizes to make:

PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:

A) Cyclohexane

B) Benzene

C) Hexane

D) Toluene

28 / 100

Category: Chemistry Ch 11 Class 12

) Melting point of methyl alcohol is:

-97 C

-89 C

-100 C

-23 C

29 / 100

Category: Chemistry Ch 9 Class 12

Which of the following method is used to prepare Ethylene glycol from ethene?

PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:

A) Dehydration

B) Hydroxylation

C) Hydration

D) Luca's test

30 / 100

Category: Chemistry

Q.35 Instantaneous dipole is produced when

A. Two polar molecules come closer

B. Two non-polar molecules comes closer

C. Polar and nonpolar molecule comes closer

D. All of these

31 / 100

Category: Chemistry Ch 11 Class 12

Which of the following compounds will give a secondary alcohol after reaction with NaBH4?

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) CH3COCH3

B) CH3COOCH3

C) CH3CH2CHO

D) CH3CH2COOH

32 / 100

Category: Chemistry

Q.16 Actual yield is always less than theoretical yield due to

A. Operational losses

B. reaction reversibility

C. side reaction

D. all of these

33 / 100

Category: Chemistry Ch 11 Class 11

Rate = K [N2O5] has _____ of reaction.

NTS 2013
Chemistry
Reaction Kinetics
Elimination Tool:

A) First order

B) Pseudo first order

C) Second order

D) Third order

34 / 100

Category: Chemistry Ch 1 Class 11

The efficiency of a chemical reactions can be checked by calculating ________ yield.

PMC Practice 30
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Percentage

B) Actual

C) Theoretical

D) All of these options are correct

35 / 100

Category: Chemistry

Q.70 To prepare a buffer with pH close to 9, the mixture used would be

A. CH3COOH + CH3COONa

B. NaHCO3 + H2CO3

C. H3PO4 + NaH2PO4

D. NH4OH + NH4Cl

36 / 100

Category: Chemistry

The carbonates of alkali metals are soluble in water except:

NUMS Mock 3
Chemistry
s and p Block Elements

A) K2CO3

B) Li2CO3

C) Na2CO3

D) Rb2CO3

37 / 100

Category: Chemistry Ch 13 Class 12

Lysine is a
amino acid

Acidic

Basic

Neutral

Amphoteric

38 / 100

Category: Chemistry Ch 14 Class 12

Graphite has a structural similarity with:

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

A) B2H6

B) B4C

C) B

D) BN

39 / 100

Category: Chemistry Ch 1 Class 12

Which of the following statements about H2S is false?

NTS 2017
Chemistry
Periodicity in Elements
Elimination Tool:

A) It is a covalent compound

B) It is a gas with bad smell

C) It is a stronger reducing agent than H2O

D) It is a weak base in water

40 / 100

Category: Chemistry Ch 3 Class 11

Which of the following substances has giant covalent structure?

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

A) Iodine crystal

B) Solid CO2

C) Silica

D) White phosphorus

41 / 100

Category: Chemistry

Maximum number of electrons in a subshell is given by:

NUMS Mock 1
Chemistry
Atomic Structure

A) 2 (2l – 1)

B) 2 (2l + 1)

C) 2(l + 1)

D) 2l + 1

42 / 100

Category: Chemistry Ch 4 Class 11

Viscosity of HF is: c) y d) a) Greater than 1120 b) Smaller than F120 c) Equal to HIO d) Plane of these

Greater than H2O

Smaller than H2O

Equal to H2O

None of these

43 / 100

Category: Chemistry Ch 11 Class 12

Phenol Acts as

Mild agent

Reducing agent

Oxidizing agent

All of the above

44 / 100

Category: Chemistry Ch 2 Class 12

Most abundant salt of sodium in nature is:

NTS 2017
Chemistry
s and p Block Elements
Elimination Tool:

A) NaNO3

B) Na2SO4

C) NaOH

D) NaCl

45 / 100

Category: Chemistry

Q.156 Which of the following centers are present in the carbonyl compounds?

A. Electrophilic

B. Nucleophilic

C. Electron deficient

D. All of these

46 / 100

Category: Chemistry Ch 11 Class 12

How are carboxylic acids formed from alcohol?

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

A) Hydrolysis

B) Reduction

C) Oxidation

D) Protonation

47 / 100

Category: Chemistry Ch 2 Class 11

The chemical analysis of a compound having molecular mass 188 gives, C=12.8%, H=2.1% and Br=85.1%. Its molecular formula is:

NTS 2014
Chemistry
Stoichiometry
Elimination Tool:

A) CH2Br

B) C2H4Br2

C) C2H4Br

D) CH2(Br)2

48 / 100

Category: Chemistry Ch 4 Class 12

Oxidation Number of all the elements in the free state is?

PMC Practice 5
Chemistry
d and f Block Elements
Elimination Tool:

A) Unity

B) Positive

C) Zero

D) Negative

49 / 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

50 / 100

Category: Chemistry Ch 1 Class 11

The atomic mass, molecular mass, ionic mass or formula mass of a substance expressed in grams is called:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Mole of a substance

B) Weight of substance

C) Mass of substance

D) Molar mass of substance

51 / 100

Category: Chemistry

Q.92 The correct statement about 2px and 2pz is

A. Both are shells of same atom

B. Both are degenerate orbitals

C. Both subshell have same energy

D. Both orbitals are parallel to each other

52 / 100

Category: Chemistry Ch 12 Class 12

Ketones and aldehydes are reduced in the presence of catalyst:

Pd

Al203

R-Mg-X

SOCl2

53 / 100

Category: Chemistry Ch 8 Class 12

The general formula of Methane Dichloride is:

CH3Cl2

CH4Cl2

CH2Cl2

None of these

54 / 100

Category: Chemistry Ch 7 Class 11

Value of heat capacity of water is

4.51 J/g

4.18 J/g

4.921J/g

4.21J/g

55 / 100

Category: Chemistry Ch 13 Class 12

Which of the following is the strongest acid?

PMC 2020
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) Propanoic acid

B) Fluoroethanoic acid

C) Trichloroethanoic acid

D) Nitroethanoic acid

56 / 100

Category: Chemistry Ch 12 Class 12

Odour of formaldehyde Is:

Pungent

Aromatic

c) Pleasant

Obnoxious

57 / 100

Category: Chemistry Ch 6 Class 11

Which of the following has maximum Ionization energy?

He

Ne

Ar

Kr

58 / 100

Category: Chemistry Ch 5 Class 11

The lightest positive rays obtained is from:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

A) Hydrogen gas

B) Helium

C) Neon

D) Air

59 / 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

60 / 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

61 / 100

Category: Chemistry Ch 7 Class 11

Born Haber cycle is used to determine:

PMC 2020
Chemistry
Thermochemistry
Elimination Tool:

A) Electron affinity

B) Lattice energy

C) Crystal energy

D) All of the above

62 / 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

63 / 100

Category: Chemistry

Q.155 In proteins the H bonding is present between

A.C-H

B. N-H

C.0-H

D. Cl-H

64 / 100

Category: Chemistry Ch 2 Class 12

The basic character of alkali metal oxides:

Decreases down the group

Remains same

Increases down the group

None of these

65 / 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

66 / 100

Category: Chemistry

Q.36 How will the conditions be changed to prevent the volume of the given gas from expanding when its mass is increased

A. Temperature and pressure increased

B. Temperature is lowered and pressure decreased

C. Temperature and pressure increasediiiiiiiiii

D. Temperature is lowered and pressure increased

67 / 100

Category: Chemistry Ch 3 Class 11

What is the temperature at which the volume of gas is said to be zero?

NTS 2015 SMBBMC
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 0 C

B) 4 C

C) -273.16 C

D) -173.16 C

68 / 100

Category: Chemistry Ch 4 Class 12

F-block elements are called?

PMC Practice 1
Chemistry
d and f Block Elements
Elimination Tool:

A) Inner transition

B) Outer transition

C) Both

D) None

69 / 100

Category: Chemistry Ch 4 Class 12

Which of these is not an isotope of Phosphorus?

Red Phosphoru

Black Phosphorus

White Phosphorus

Gray Phosphorus

70 / 100

Category: Chemistry

Which of the following will react with water?

NUMS Mock 1
Chemistry
Introduction to Fundamental Concepts of Chemistry

A) CHCl3

B) Cl3CCHO

C) CHI4

D) ClCH2CH2Cl

71 / 100

Category: Chemistry Ch 2 Class 12

Aqueous solution of Na2CO3is:

NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:

A) Acidic

B) Alkaline

C) Both Acidic and Alkaline

D) Neutral

72 / 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

73 / 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

74 / 100

Category: Chemistry

Formula of hydrogen peroxide

HO

H202

H02

H302

75 / 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

76 / 100

Category: Chemistry Ch 5 Class 11

An element has configuration 2, 8, 1. It belongs to, ______.

NTS 2016 SMBBMC
Chemistry
Atomic Structure
Elimination Tool:

A) IA group and 3rd period

B) IIIA group and 1st period

C) IA group and 8th period

D) VIIA group and 3rd period

77 / 100

Category: Chemistry Ch 2 Class 12

Which one of the following is a common mineral of calcium? a

Feldspar

Limestone

Diamond

None of these

78 / 100

Category: Chemistry Ch 12 Class 12

Metaformaldehyde is a result of?

Condensation

Reduction

Polymerization

Oxidation

79 / 100

Category: Chemistry

Q.88 Acetaldehyde in the presence of Con.H2SO4 undergoes

A. Dehydration

B. Polymerization

C. Condensation

D. Oxidation reaction

80 / 100

Category: Chemistry Ch 5 Class 11

The maximum possible number of electrons a shell ‘n’ can accommodate is given by:

NTS 2012
Chemistry
Atomic Structure
Elimination Tool:

A) n

B) n2

C) 2n2

D) n3

81 / 100

Category: Chemistry Ch 2 Class 11

If during crystallization more solute could not be dissolved in the solution, the solution is:

Saturated solution

Dilute solution

Concentrated solution

None of these

82 / 100

Category: Chemistry Ch 10 Class 12

When Grignard reagent react with water they give as a product

Ether

Amine

Alkane

Alcohol

83 / 100

Category: Chemistry Ch 3 Class 12

Borax bead test is used to separate:

) Metallic cations

Non-metallic cations

Metallic anions

Non-metallic anions

84 / 100

Category: Chemistry Ch 8 Class 12

Which gas among the following can be dried by bubbling in H2S04?

Ammonia gas

HCI gas

Ethyne

Oxygen gas

85 / 100

Category: Chemistry Ch 14 Class 12

In the NaCl crystal, chloride ions present at the face center are distributed in:

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

A) One Unit Cell

B) 8 Unit Cells

C) 4 Unit Cells

D) 2 Unit Cells

86 / 100

Category: Chemistry

Which of the following does not give iodoform test?

NUMS Mock 1
Chemistry
Aldehydes and Ketones

A) Ethanol

B) Ethanal

C) Acetophenone

D) Benzophenone

87 / 100

Category: Chemistry Ch 7 Class 12

IUPAC name of this is (CH3)2 – CH – CH (C2H5) – C(CH3)3

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

A) 3-ethyl-2, 2, 4-trimethyl pentane

B) 4-ethyl-2, 2, 4-trimethyl pentane

C) 5-ethyl-2, 2, 4-trimethyl pentane

D) 2-ethyl-2, 2, 4-trimethyl pentane

88 / 100

Category: Chemistry

The mass of proton is ______ times heavier than ______.

NUMS Mock 4
Chemistry
Atomic Structure

A) 1889, electrons

B) 1886, electrons

C) 1836, protons

D) 1836, electrons

89 / 100

Category: Chemistry Ch 7 Class 11

Work done on the system is

PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:

A) Negative

B) depends upon Boundary Conditions

C) Positive

D) Zero

90 / 100

Category: Chemistry Ch 13 Class 12

In the case of HOCH2CH2CH2COOH, from where is numbering started?

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

A) OH group is given number 1 position

B) Carboxylic acid is given number 1 position

C) COOH is given number 3 position

D) COOH is given number 4 position

91 / 100

Category: Chemistry Ch 15 Class 12

What is the nature of “hydrated tricalcium aluminate” (3 Ca. Al203. 6 H20) in the setting of cement?

) Hardened mass

Hardened Gel

Colloidal Gel

Liquid

92 / 100

Category: Chemistry Ch 3 Class 12

Burning of amorphous Boron in air forms

B(OH)3

B203

BN

Mixture of B203& BN

93 / 100

Category: Chemistry Ch 2 Class 11

Silver oxide decomposes when heated to silver and oxygen. If 0.5 moles of lunar caustic is heated up to 450 degrees, giving out Nitrogen dioxide and oxygen leaving silver as metal, what is the mass of the residue?

NTS 2015 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

A) 108 grams

B) 54 grams

C) 216 grams

D) 27 grams

94 / 100

Category: Chemistry Ch 14 Class 12

Polymerization is of how many types:

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

A) Two

B) One

C) Three

D) Four

95 / 100

Category: Chemistry Ch 2 Class 12

Rocky crust of earth is mainly composed of?

Oxygen and Silicon

Oxygen and Hydrogen

b) Oxygen and Carbon

Carbon and Hydrogen

96 / 100

Category: Chemistry Ch 3 Class 12

Which of the following is not an interstitial compound?

NTS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) Cu-Zn

B) Cu-Zn-Sn

C) TiH1.73

D) V2O5

97 / 100

Category: Chemistry Ch 6 Class 11

If the difference between electronegativity values between two atoms is less than 1.7 , the bond is necessarily:

NTS 2016 DUHS & JSMU
Chemistry
Chemical Bonding
Elimination Tool:

A) Ionic

B) Covalent

C) Electrovalent

D) Polar

98 / 100

Category: Chemistry Ch 5 Class 11

Which of the following does not have an inert gas configuration?

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

A) Na+

B) Cu+

C) K+

D) S2-

99 / 100

Category: Chemistry Ch 8 Class 11

In Exothermic Reactions heat is _______

PMC Sample 3
Chemistry
Chemical Equilibrium
Elimination Tool:

A) Taken in

B) Give out to surroundings

C) Neither given nor lost

D) None of these

100 / 100

Category: Chemistry Ch 16 Class 12

Treatment of water which is very effective in killing of pathogens is:

Aeration

Coagulation

Landfill

Chlorine usage

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