Chemistry Practice Tests 2

Created by Ali Durrani

NET Practice

Chemistry Practice Test 2

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1 / 100

Category: Chemistry Ch 16 Class 12

What is the major reason for S02 emissions?

Agriculture

Volcanic eruptions

Fuel combustion

All of the above

2 / 100

Category: Chemistry Ch 8 Class 11

If Kc = 1, then reaction is:

At equilibrium

complete

Moves in forward direction

None of these

3 / 100

Category: Chemistry Ch 13 Class 12

Ease of esterification of the following alcohols CH3CH2OH(I),(CH3)2CHOH and (CH3)3COH(III) with HCOOH is:

NUMS 2017
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A) I < II < III

B) III < II < I

C) II < I < III

D) I = II = III

4 / 100

Category: Chemistry Ch 10 Class 11

The E.M.F of a Cell is equals to

PMC Sample 1
Chemistry
Electrochemistry
Elimination Tool:

A) Emf(oxidation) – Emf(Reduction)

B) Emf(oxidation) + Emf(Reduction)

C) Emf(oxidation) x Emf(Reduction)

D) None of these

5 / 100

Category: Chemistry Ch 10 Class 12

In alkyl halide, the halide ion has charge on it when attached to C-atom.

Positive

Negative

Partial positive

Partial negative

6 / 100

Category: Chemistry Ch 1 Class 11

One mole of substance at STP has:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Stoichiometry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 2.24 dm³

B) 24.4 dm³

C) 2.44 dm³

D) 22.4 dm³

7 / 100

Category: Chemistry Ch 11 Class 11

The chemical reaction in which reactions require high amount of activation energy are generally:

NTS 2014
Chemistry
Reaction Kinetics
Elimination Tool:

A) Slow

B) First fast then slow

C) First slow then fast

D) Spontaneous

8 / 100

Category: Chemistry Ch 2 Class 11

A bottle of cold drink contains 200 ml liquid in which CO2 is 0.1 molar . Suppose carbon dioxide behaves like an ideal gas the volume of dissolved carbon dioxide at STP is?

NTS 2015 DUHS and JSMU
Chemistry
Stoichiometry
Elimination Tool:

A) 0.224 L

B) 0.448 L

C) 22.4 L

D) 2.24 L

9 / 100

Category: Chemistry Ch 15 Class 12

Which of the following is a Marco-nutrient

Boron

Copper

Iron

Nitrogen

10 / 100

Category: Chemistry Ch 6 Class 12

ransition elements are colored because of:

d-d transition

d-p transition

p-p transition

s-d transition

11 / 100

Category: Chemistry Ch 11 Class 12

In which of the following reaction does the C-O bond of alcohol not break?

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

A) Reaction with SOCl2

B) Dehydration

C) Esterification

D) All of these options are correct

12 / 100

Category: Chemistry

Q.93 The ionizatior energy of group _____________shows abnormal trend

A. 3A & 4A

B. SA &6A

C. 6A & 4A

D. 3A & 6A

13 / 100

Category: Chemistry Ch 7 Class 12

Isomerism is:

Same molecular formula but different structure

Same molecular formula and same structure

Different molecular formula but same structure

None of these

14 / 100

Category: Chemistry Ch 3 Class 11

Liquid crystals are used for:

Making LCD

Making thermometers

Optical Imaging

All of these

15 / 100

Category: Chemistry Ch 16 Class 12

Ozone Is

02

03

04

ps

16 / 100

Category: Chemistry Ch 6 Class 12

Transition elements are colored in which type of compounds?

Ionic

Covalent

Both a and b

None of these

17 / 100

Category: Chemistry Ch 4 Class 11

Which of the following has the higher bond forces amount its molecules

Hydrogen

Neon

Water

Hydrogen Fluoride

18 / 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+

19 / 100

Category: Chemistry Ch 6 Class 11

Geometry of SF6 is:

Octahedral

Hexagonal

Decahedral

Trigonal

20 / 100

Category: Chemistry

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

A. Br

B.CH4

C. NH3

D. H2O

21 / 100

Category: Chemistry Ch 11 Class 11

Blue litmus turns red in a solution of PH

NUMS 2014
Chemistry
Acids, Bases and Salts
Elimination Tool:

A) Below 7

B) 7

C) Above 7

D) at all 7

22 / 100

Category: Chemistry Ch 4 Class 11

In the gaseous state, the distance between the molecules is ___ times _____ than their diameters.

PMC Sample 3
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 2, lesser

B) 3, lesser

C) 3, greater

D) 2, greater

23 / 100

Category: Chemistry Ch 6 Class 11

Lithium and beryllium are unique in such a way that they have higher charge densities which produce strong polarizing effects due to:

NTS 2018
Chemistry
Chemical Bonding
Elimination Tool:

A) Non-metal

B) Solubility

C) Small Size

D) Large size

24 / 100

Category: Chemistry Ch 4 Class 11

Gas is enclosed in a container of 20 cm3 with the moving piston. According to kinetic theory of gases, what will be the effect on freely moving molecules of the gas if temperature is increased from 20 C to 100 C?

UHS 2018
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Pressure will become one half

B) Volume will be increased

C) Temperature has no effect on freely moving molecules

D) Colliding capability of molecule will become lower

25 / 100

Category: Chemistry Ch 10 Class 12

SN2 reactions can be best carried out with:

NTS 2019
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) Primary alkyl halides

B) Secondary alkyl halides

C) Tertiary alkyl halides

D) Both primary and tertiary alkyl halides

26 / 100

Category: Chemistry Ch 8 Class 12

CH ≡ CH + 2AgNO3 -> AgC ≡ CAg + 2HNO3 represents _____ property of acetylene.

NTS 2012
Chemistry
Hydrocarbons
Elimination Tool:

A) basic

B) acidic

C) dehydrating

D) physical

27 / 100

Category: Chemistry Ch 5 Class 11

Number of transitions possible for an electron in the 6th shell are

10

15

20

25

28 / 100

Category: Chemistry Ch 15 Class 12

What is the catalyst used in the Haber process?

H₂ + N₂ ⟶ NH₃

PMC 2021 Tested
Chemistry
Industrial Chemistry
Elimination Tool:

A) Chlorine

B) Iron

C) Magnesium

D) Calcium

29 / 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

30 / 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

31 / 100

Category: Chemistry Ch 3 Class 12

Transition Elements usually show:

NUMS 2015
Chemistry
d and f Block Elements
Elimination Tool:

A) Para magnetism

B) Diamagnetism

C) Ferromagnetism

D) Both Ferromagnetism and Paramagnetism

32 / 100

Category: Chemistry Ch 15 Class 12

Urea is the most widely used nitrogen fertilizer in Pakistan. Its composition is:

UHS 2015
Chemistry
Environmental Chemistry
Elimination Tool:

A) NH2CO

B) N2H5CO2

C) N2H4CO2

D) N2H4CO

33 / 100

Category: Chemistry Ch 15 Class 12

The zone where moisture is removed and clay is broken down into Al203, Si02, Fe203 is

Burning zone

Cooling zone

Drying zone

Decomposition zone

34 / 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

35 / 100

Category: Chemistry Ch 2 Class 12

Identify the correct statement:

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

A) Element sodium can be prepared and isolated by electrolyzing an aqueous solution of NaCl

B) Elemental Na is a strong oxidizing agent

C) Elemental Na is insoluble in NH3

D) Elemental Na is easily oxidizing

36 / 100

Category: Chemistry Ch 5 Class 11

The correct order of orbitals is:

1s,2s,2p,3s, 3p, 4s, 3d, 4p, 5s

1s,2s,2p,3s, 3p, 3d, 31, 4s, 5d

1s,2s,2p,3s, 3p, 3d, 4p, 4s, 5s

1s,2s,2p,3s, 3p, 4s, 4p, 4d, 5s

37 / 100

Category: Chemistry Ch 9 Class 12

What happens when one mole of ethane is mixed in the dark at room temperature with six moles of chlorine?

NTS 2017
Chemistry
Hydrocarbons
Elimination Tool:

A) There is no reaction.

B) CH3CH2Cl and HCl are formed.

C) CH3CCl3 and HCl are formed.

D) CCl3CCl3 and HCl are formed.

38 / 100

Category: Chemistry

Hydrolysis of acyl chloride results in the formation of:

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

A) Acid anhydride

B) Carboxylic acid

C) Amides

D) Esters

39 / 100

Category: Chemistry Ch 1 Class 12

Borax exists in nature as:

NTS 2013
Chemistry
Periodicity in Elements
Elimination Tool:

A) Na2B4O7.10H2O

B) Na2B4O7.7H2O

C) Na2B4O7.5H2O

D) Na2B4O7.3H2O

40 / 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

41 / 100

Category: Chemistry Ch 10 Class 11

On balancing the following chemical equation: K2CrO4, + HCI –> KCI + 2CrCI3 + Cl2 + H2O The co-efficient with HCI will be?

12

14

13

16

42 / 100

Category: Chemistry Ch 1 Class 12

6th period of periodic table contains elements:

26

21

32

7

43 / 100

Category: Chemistry Ch 2 Class 12

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

Higher

lower

Same

Varies

44 / 100

Category: Chemistry Ch 12 Class 12

In which of the following reaction alkyl ketones are converted Into carboxylic acid with one carbon atom less than the parent compound?

Haloform

Cannizzaro

Aldol

None

45 / 100

Category: Chemistry Ch 5 Class 11

If an electron of hydrogen atom jumps from 5th orbit to 7’h orbit, its atomic radius increases

97%

98%

50%

None of these

46 / 100

Category: Chemistry Ch 11 Class 12

Primary Alcohol is produced by reactions of Grignard’s reagent with _________ followed by hydrolysis in an acidic medium.

NTS 2011
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Carbon dioxide

B) Formaldehyde

C) Acetaldehyde

D) Ketone

47 / 100

Category: Chemistry Ch 8 Class 11

The Ksp of AgCl is 2.0 x 10^-10-1010 mol2dm-6 . The maximum concentration of Ag+ ions:

NUMS 2015
Chemistry
Chemical Equilibrium
Elimination Tool:

A) 2.0 x 10-10mol.dm-6

B) 1.41 x 10-5mol.dm-3

C) 1.0 x 10-5mol.dm-3

D) 4.0 x 10-20mol.dm-3

48 / 100

Category: Chemistry Ch 6 Class 11

Structure of ammonia is:

Linear

AB4 (bent or angular)

AB3 (Trigonal)

AB4 (Trigonal pyramidal)

49 / 100

Category: Chemistry Ch 11 Class 11

In a zero-order reaction, the rate is independent of:

NTS 2019
Chemistry
Reaction Kinetics
Elimination Tool:

A) The temperature of the reaction

B) The concentration of reactants.

C) Concentration of products

D) Catalyst used

50 / 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

51 / 100

Category: Chemistry Ch 1 Class 12

Aqua regia can dissolve noble metal due to the formation of

NTS 2016 SMBBMC
Chemistry
Periodicity in Elements
Elimination Tool:

A) Nitrous acid

B) Nitric oxide

C) Nitrosyl chloride

D) Nascent nitrogen

52 / 100

Category: Chemistry Ch 4 Class 11

To conduct electricity through Ionic Solids, the ions should be:

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

A) Excited

B) Energized

C) Free

D) In random motion

53 / 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

54 / 100

Category: Chemistry

Q.117 After the hydrolysis of ester the change in concentration of acid at different intervals is calculated by

A. Titration with KMnO4

B. Titration with Standard Alkali

C. Distillation

D. Evaporation of mixture

55 / 100

Category: Chemistry Ch 2 Class 11

The efficiency of chemical reaction can be expressed as:

PMC 2020
Chemistry
Stoichiometry
Elimination Tool:

A) Theoretical yield

B) Actual yield

C) % yield

D) Maximum yield

56 / 100

Category: Chemistry Ch 3 Class 12

The color of transition metal complexes is due to transition of electrons between:

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

A) p to d orbitals

B) d to d orbitals

C) p to p orbitals

D) d to p orbitals

57 / 100

Category: Chemistry

Q.174 The alcohols which are resistant to oxidation reactions are

A. Primary alcohols

B. Secondary alcohol

C. Tertiary alcohol

D. All of above

58 / 100

Category: Chemistry Ch 11 Class 12

In Lucas test, tertiary alcohols form oily layer of alkyl halid ___ ?

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) On heating

B) Immediately

C) After 5-10 minutes

D) After 20 minutes

59 / 100

Category: Chemistry

Q.115 Alcohols can be oxidized to aldehyde and ketone by warming with acidified potassium dichromate. Which among of the following alcohols resists to this change

A. (CH3)2 CH CH2OH

B. CH3 CH2 CH(CH3) OH

C. (CH3)3 COH

D. C6H3 CH2 OH

60 / 100

Category: Chemistry Ch 1 Class 12

Transition elements have coloured compounds because:

NTS 2013
Chemistry
Periodicity in Elements
Elimination Tool:

A) Their bond energy is low

B) they easily absorb energy

C) splitting of the five degenerate d-orbitals take place

D) d-orbitals are very close to p-orbitals

61 / 100

Category: Chemistry

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

NUMS Mock 4
Chemistry
Hydrocarbons

A) Ethene

B) Ethane

C) Ethyne

D) Methane

62 / 100

Category: Chemistry

Which one of the following is not an isotope of hydrogen:

NUMS Mock 2
Chemistry
Atomic Structure

A) Deuterium

B) Tritium

C) Ortho hydrogen

D) None of these

63 / 100

Category: Chemistry Ch 1 Class 12

Which of the following catalysts is used in the decomposition of laughing gas N2O at 1000 K?

2N2O 2N2 + O2

NTS 2016 SMBBMC
Chemistry
Periodicity in Elements
Elimination Tool:

A) Glycine

B) V2O5

C) Fe

D) Traces of Cl2

64 / 100

Category: Chemistry Ch 4 Class 12

Which of the following has allotropic forms:

Oxygen

Sulphur

Both

None of these

65 / 100

Category: Chemistry Ch 4 Class 11

273 mL of a gas at STP was taken to 27oC and 600 mm pressure. The final volume of the gas would be:

PMC Practice 2
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 273 mL

B) 300 mL

C) 380 mL

D) 586 mL

66 / 100

Category: Chemistry Ch 10 Class 12

Which of the following is true about SN2 reactions:

They follow a two-step bimolecular mechanism

they do not undergo rearrangements

Methyl and primary substrates react faster than secondary and tertiary substrates

the rate of the reactions depend on both the substrate and nucleophile concentration

67 / 100

Category: Chemistry Ch 3 Class 12

The formula of cryolite is

Na2AIF6

Na3AIF3

Na3AIF6

Na2AlCl6

68 / 100

Category: Chemistry Ch 3 Class 11

Which one is not related to evaporation?

NUMS 2015
Chemistry
Thermochemistry
States of Matter
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) Continuous

B) Endothermic

C) Exothermic

D) Spontaneous

69 / 100

Category: Chemistry Ch 11 Class 11

The unit of the rate constant is the same as that of the rate of reaction in:

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

A) Zero order reaction

B) First order reaction

C) Second order reaction

D) Third order reaction

70 / 100

Category: Chemistry Ch 4 Class 11

Which of the following properties does not belong to Gases?

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

A) Indefinite volume

B) Indefinite shape

C) Low density

D) Strong interactions

71 / 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

72 / 100

Category: Chemistry

“The sum of all the exponents to which the molar concentration in terms in the rate equation are raised” defines:

NUMS Mock 2
Chemistry
Reaction Kinetics

A) Rate of reaction

B) Order of reaction

C) Type of reaction

D) Product of reaction

73 / 100

Category: Chemistry Ch 6 Class 11

Second Ionization energy of M atom

Higher than first ionization energy

Lower than first ionization energy

Very low

None of these

74 / 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

75 / 100

Category: Chemistry Ch 4 Class 12

Unpaired electron trend of transition elements:

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

A) Increases till Mn and decreases till Zn

B) Remains unchanged

C) Decreases

D) Increase

76 / 100

Category: Chemistry

The reaction between borohydride

Nucleophilic substitution

Electrophilic substitution

Electrophilic addition

d) Both a and c

77 / 100

Category: Chemistry Ch 14 Class 12

Proteins also contain _____ bonding.

PMC Practice 7
Chemistry
Macromolecules
Elimination Tool:

A) Covalent

B) Ionic

C) Hydrogen

D) Metallic

78 / 100

Category: Chemistry

While finding the relative atomic mass, which of the following standard is used to compare the atomic mass of chlorine (35.5 amu)

NUMS Mock 1
Chemistry
Stoichiometry

A) Carbon – 13

B) Neon – 20

C) Carbon – 12

D) Nucleon number

79 / 100

Category: Chemistry

Q.89 Iftwo substituents are present at 1,4 positions then the isomer is called As____________?

A. Ortho

B. Meta

C.Para

D.None of these

80 / 100

Category: Chemistry Ch 1 Class 12

At the end of the periodic table _____ are found.

NTS 2016 DUHS & JSMU
Chemistry
Periodicity in Elements
Elimination Tool:

A) S block element

B) P block element

C) D block element

D) Noble gases

81 / 100

Category: Chemistry Ch 3 Class 11

All the gasses at 212.44 cm3 have

Same mass

Different mass

Can't be predicted

None of these

82 / 100

Category: Chemistry

Q.24 Non polar covalent bond is formed b/w

A. homonuclear diatomic molecules

B. heteronuclear diatomic molecules

C. similar atoms

D. dissimilar atoms

83 / 100

Category: Chemistry Ch 14 Class 12

Chloroform is used as the following except:

NUMS 2015
Chemistry
Macromolecules
Elimination Tool:

A) Precursor of making Teflon

B) Precursor of making refrigerants

C) Anaesthetic

D) Embalming chemicals

84 / 100

Category: Chemistry Ch 5 Class 12

Which of the following has highest boiling point?

He

Ne

Ar

Kr

85 / 100

Category: Chemistry Ch 6 Class 11

The Lattice energy is also called as:

PMC 2020
Chemistry
Chemical Bonding
Elimination Tool:

A) Energy of affinity

B) Bond energy

C) Crystal energy

D) Potential energy

86 / 100

Category: Chemistry Ch 14 Class 12

Teflon is name of:

Polytetraflurorthylene

Polyhexafluoroethylene

Polytetrachloroethylene

Polyhydrafluoroethylene

87 / 100

Category: Chemistry Ch 1 Class 12

Which of following pair has highest conductivity?

Gold, Aluminium

Gold, Tungsten

Silver, Copper

Carbon, Gold

88 / 100

Category: Chemistry Ch 1 Class 11

If you need to produce carbon dioxide from 12 grams of carbon, how many grams would you need?

32

4

16

8

89 / 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

90 / 100

Category: Chemistry Ch 16 Class 12

The best yield of 502 can be obtained by which of the following:

Burning of coal

Excess of oxygen

Fertilization

Oxides of pyrites

91 / 100

Category: Chemistry Ch 9 Class 11

Molal freezing point constant of water is:

UHS 2013
Chemistry
Solution and Colloids
Elimination Tool:

A) 1.86

B) 2.86

C) 11.86

D) 0.52

92 / 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

93 / 100

Category: Chemistry Ch 2 Class 12

Metals belonging to the same group in the periodic table are

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

A) Magnesium and Na

B) Magnesium and Copper

C) Magnesium and Barium

D) Magnesium and Potassium

94 / 100

Category: Chemistry Ch 5 Class 11

Breaking of neutron produces?

Electron, proton and neutrino

Electron, positron and neutrino

Proton and positron

Alpha particles

95 / 100

Category: Chemistry Ch 8 Class 11

A solution having pH = 0 is

Strongly basic

Weakly basic

Neutral

Strongly acidic

96 / 100

Category: Chemistry Ch 10 Class 12

The order of reactivities of the following alkyl halides for an SN2 reaction is:

NUMS 2016
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A) RF > RCl > RBr > RI

B) RF > RBR > RCl > RI

C) RCl > RBr > RF > RI

D) RI > RBr > RCl > RF

97 / 100

Category: Chemistry Ch 13 Class 12

What happens if we react a carboxylic acid with an acyl chloride?

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

A) It forms an acid anhydride

B) It forms an acyl halide

C) It does not react due to resonance

D) It does not react due to bad leaving group

98 / 100

Category: Chemistry

Which of the following has the correct order in terms of increasing acidity?

NUMS Mock 1
Chemistry
Acids, Bases and Salts

A) HI < HBr < HCl < HF

B) CH4< NH3< H2O < HF

C) Both of the above options

D) Cannot be determined

99 / 100

Category: Chemistry Ch 7 Class 11

The enthalpy of certain reactions at 273 K is -20.75 kJ. The enthalpy of the same reaction at 373 K (if heat capacities of reactants and products are the same) will be:

NTS 2017
Chemistry
Thermochemistry
Elimination Tool:

A) －20.75 kJ

B) -2075 kJ

C) Zero

D) －20.75 x 373/273 kJ

100 / 100

Category: Chemistry Ch 5 Class 12

Sulfur with HI acts as a:

Strong oxidizing agent

Strong reducing agent

Weak oxidizing agent

Weak reducing agent

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