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NEET 2022 — Chemistry

All 49 Chemistry questions we hold from this paper, of the 199 on the site for this sitting — every option and the answer key. 4 marks each, −1 for a wrong answer.

Chemistry

45 questions, one correct option each. +4 for a correct answer, −1 for a wrong one, nothing for a blank.

Q1openClassification of Elements and Periodicity in Properties · Modern periodic table and electronic basis

The IUPAC name of an element with atomic number 119 is:

  1. A.ununoctium
  2. B.ununennium✓
  3. C.unnilennium
  4. D.unununnium

The worked solution is part of a paid pack.

Q2openBiomolecules · Proteins, enzymes and vitamins

The incorrect statement regarding enzymes is:

  1. A.Enzymes are very specific for a particular reaction and substrate
  2. B.Enzymes are biocatalysts
  3. C.Like chemical catalysts, enzymes reduce the activation energy of bio-processes
  4. D.Enzymes are polysaccharides✓

The worked solution is part of a paid pack.

Q3openElectrochemistry · Electrochemical cells and Nernst equation

Given below are half-cell reactions:

MnO4−+8H++5e−→Mn2++4H2O;EMn2+/MnO4−∘=−1.510 V\mathrm{MnO_4^- + 8H^+ + 5e^- \rightarrow Mn^{2+} + 4H_2O};\quad E^\circ_{\mathrm{Mn^{2+}/MnO_4^-}} = -1.510\ \mathrm{V}

12O2+2H++2e−→H2O;EO2/H2O∘=+1.223 V\tfrac12\mathrm{O_2 + 2H^+ + 2e^- \rightarrow H_2O};\quad E^\circ_{\mathrm{O_2/H_2O}} = +1.223\ \mathrm{V}

Will the permanganate ion, MnO4−\mathrm{MnO_4^-}, liberate O2\mathrm{O_2} from water in the presence of an acid?

  1. A.No, because Ecell∘=−2.733E^\circ_{cell} = -2.733 V
  2. B.Yes, because Ecell∘=+0.287E^\circ_{cell} = +0.287 V✓
  3. C.No, because Ecell∘=−0.287E^\circ_{cell} = -0.287 V
  4. D.Yes, because Ecell∘=+2.733E^\circ_{cell} = +2.733 V

The worked solution is part of a paid pack.

Q4openHydrocarbons · Aromatic hydrocarbons: electrophilic substitution, directing effects

Which compound amongst the following is not an aromatic compound?

Question 54 as printed in the NEET 2022 booklet

  1. A.Structure (1)✓
  2. B.Structure (2)
  3. C.Structure (3)
  4. D.Structure (4)

The worked solution is part of a paid pack.

Q5openPurification and Characterisation of Organic Compounds · Qualitative and quantitative analysis

Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

Question 55 as printed in the NEET 2022 booklet

  1. A.Structure (1)
  2. B.Structure (2)
  3. C.Structure (3)
  4. D.Structure (4)✓

The worked solution is part of a paid pack.

Q6openEquilibrium · Ionic equilibrium: acids, bases, pH, buffers

The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is (given pKa\mathrm{p}K_a of CH3COOH\mathrm{CH_3COOH} = 4.57):

  1. A.2.57
  2. B.5.57✓
  3. C.3.57
  4. D.4.57

The worked solution is part of a paid pack.

Q7open

Identify the incorrect statement from the following:

  1. A.Lithium is the strongest reducing agent among the alkali metals
  2. B.Alkali metals react with water to form their hydroxides
  3. C.The oxidation number of K in KO2\mathrm{KO_2} is +4✓
  4. D.Ionisation enthalpy of alkali metals decreases from top to bottom in the group

The worked solution is part of a paid pack.

Q8openOrganic Chemistry: Some Basic Principles and Techniques · Isomerism: structural and stereo

The incorrect statement regarding chirality is:

  1. A.A racemic mixture shows zero optical rotation
  2. B.SN1\mathrm{S_N1} reaction yields a 1 : 1 mixture of both enantiomers
  3. C.The product obtained by SN2\mathrm{S_N2} reaction of a haloalkane having chirality at the reactive site shows inversion of configuration
  4. D.Enantiomers are superimposable mirror images of each other✓

The worked solution is part of a paid pack.

Q9open

Given below are two statements:

Statement I: In the coagulation of a negative sol, the flocculating power of the three given ions is in the order Al3+>Ba2+>Na+\mathrm{Al^{3+} > Ba^{2+} > Na^+}.

Statement II: In the coagulation of a positive sol, the flocculating power of the three given salts is in the order NaCl>Na2SO4>Na3PO4\mathrm{NaCl > Na_2SO_4 > Na_3PO_4}.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.Statement I is incorrect but Statement II is correct
  2. B.Both Statement I and Statement II are correct
  3. C.Both Statement I and Statement II are incorrect
  4. D.Statement I is correct but Statement II is incorrect✓

The worked solution is part of a paid pack.

Q10open

Which one is not a correct mathematical equation for Dalton's law of partial pressure? Here pp = total pressure of the gaseous mixture.

  1. A.pi=xi pi∘p_i = x_i\,p_i^\circ, where xix_i = mole fraction of the iith gas in the mixture and pi∘p_i^\circ = pressure of the iith gas in the pure state✓
  2. B.p=p1+p2+p3p = p_1 + p_2 + p_3
  3. C.p=n1RTV+n2RTV+n3RTVp = n_1\dfrac{RT}{V} + n_2\dfrac{RT}{V} + n_3\dfrac{RT}{V}
  4. D.pi=xi pp_i = x_i\,p, where pip_i = partial pressure of the iith gas and xix_i = mole fraction of the iith gas in the mixture

The worked solution is part of a paid pack.

Q11open

Which statement regarding polymers is not correct?

  1. A.Thermosetting polymers are reusable✓
  2. B.Elastomers have polymer chains held together by weak intermolecular forces
  3. C.Fibres possess high tensile strength
  4. D.Thermoplastic polymers are capable of repeatedly softening and hardening on heating and cooling respectively

The worked solution is part of a paid pack.

Q12openChemical Bonding and Molecular Structure · Hydrogen bonding and dipole moment

Given below are two statements:

Statement I: The boiling points of the following hydrides of group 16 elements increase in the order H2O<H2S<H2Se<H2Te\mathrm{H_2O < H_2S < H_2Se < H_2Te}.

Statement II: The boiling points of these hydrides increase with increase in molar mass.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.Statement I is incorrect but Statement II is correct
  2. B.Both Statement I and Statement II are correct
  3. C.Both Statement I and Statement II are incorrect✓
  4. D.Statement I is correct but Statement II is incorrect

The worked solution is part of a paid pack.

Q13openAmines · Preparation and reactions; diazonium salts

Given below are two statements:

Statement I: Primary aliphatic amines react with HNO2\mathrm{HNO_2} to give unstable diazonium salts.

Statement II: Primary aromatic amines react with HNO2\mathrm{HNO_2} to form diazonium salts which are stable even above 300 K.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.Statement I is incorrect but Statement II is correct
  2. B.Both Statement I and Statement II are correct
  3. C.Both Statement I and Statement II are incorrect
  4. D.Statement I is correct but Statement II is incorrect✓

The worked solution is part of a paid pack.

Q14openAldehydes, Ketones and Carboxylic Acids · Carboxylic acids: acidity and reactions

RMgX+CO2→dry etherY→H3O+RCOOH\mathrm{RMgX + CO_2 \xrightarrow{dry\ ether} Y \xrightarrow{H_3O^+} RCOOH}

What is Y in the above reaction?

  1. A.(RCOO)2Mg\mathrm{(RCOO)_2Mg}
  2. B.RCOO− Mg+X\mathrm{RCOO^-\,Mg^+X}✓
  3. C.R3CO− Mg+X\mathrm{R_3CO^-\,Mg^+X}
  4. D.RCOO− X+\mathrm{RCOO^-\,X^+}

The worked solution is part of a paid pack.

Q15open

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): In a particular point defect, an ionic solid is electrically neutral, even if a few of its cations are missing from its unit cells.

Reason (R): In an ionic solid, Frenkel defect arises due to dislocation of a cation from its lattice site to an interstitial site, maintaining overall electrical neutrality.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.(A) is not correct but (R) is correct
  2. B.Both (A) and (R) are correct and (R) is the correct explanation of (A)
  3. C.Both (A) and (R) are correct but (R) is not the correct explanation of (A)✓
  4. D.(A) is correct but (R) is not correct

The worked solution is part of a paid pack.

Q16open

Match List-I with List-II.

List-I (Hydrides) List-II (Nature)
(a) MgH2\mathrm{MgH_2} (i) Electron precise
(b) GeH4\mathrm{GeH_4} (ii) Electron deficient
(c) B2H6\mathrm{B_2H_6} (iii) Electron rich
(d) HF (iv) Ionic

Choose the correct answer from the options given below:

  1. A.(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
  2. B.(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)✓
  3. C.(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
  4. D.(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)

The worked solution is part of a paid pack.

Q17openThe p-Block Elements · Group 17 and 18: halogens, noble gases

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): ICl is more reactive than I2\mathrm{I_2}.

Reason (R): The I–Cl bond is weaker than the I–I bond.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.(A) is not correct but (R) is correct
  2. B.Both (A) and (R) are correct and (R) is the correct explanation of (A)✓
  3. C.Both (A) and (R) are correct but (R) is not the correct explanation of (A)
  4. D.(A) is correct but (R) is not correct

The worked solution is part of a paid pack.

Q18open

Match List-I with List-II.

List-I List-II
(a) Li (i) Absorbent for carbon dioxide
(b) Na (ii) Electrochemical cells
(c) KOH (iii) Coolant in fast breeder reactors
(d) Cs (iv) Photoelectric cell

Choose the correct answer from the options given below:

  1. A.(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)✓
  2. B.(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
  3. C.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  4. D.(a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)

The worked solution is part of a paid pack.

Q19open

Match List-I with List-II.

List-I (Drug class) List-II (Drug molecule)
(a) Antacids (i) Salvarsan
(b) Antihistamines (ii) Morphine
(c) Analgesics (iii) Cimetidine
(d) Antimicrobials (iv) Seldane

Choose the correct answer from the options given below:

  1. A.(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
  2. B.(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
  3. C.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)✓
  4. D.(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

The worked solution is part of a paid pack.

Q20openStructure of Atom · Quantum numbers, orbitals and their shapes

Identify the incorrect statement from the following:

  1. A.The shapes of dxyd_{xy}, dyzd_{yz} and dzxd_{zx} orbitals are similar to each other; and dx2−y2d_{x^2-y^2} and dz2d_{z^2} are similar to each other✓
  2. B.All the five 5d orbitals are different in size when compared to the respective 4d orbitals
  3. C.All the five 4d orbitals have shapes similar to the respective 3d orbitals
  4. D.In an atom, all the five 3d orbitals are equal in energy in the free state

The worked solution is part of a paid pack.

Q21openThe p-Block Elements · Group 13 and 14 elements

Choose the correct statement:

  1. A.Both diamond and graphite are used as dry lubricants
  2. B.Diamond and graphite have two-dimensional networks
  3. C.Diamond is covalent and graphite is ionic
  4. D.Diamond is sp3sp^3 hybridised and graphite is sp2sp^2 hybridised✓

The worked solution is part of a paid pack.

Q22openChemical Bonding and Molecular Structure · Molecular orbital theory

Which amongst the following is an incorrect statement?

  1. A.O2+\mathrm{O_2^+} ion is diamagnetic✓
  2. B.The bond orders of O2+\mathrm{O_2^+}, O2\mathrm{O_2}, O2−\mathrm{O_2^-} and O22−\mathrm{O_2^{2-}} are 2.5, 2, 1.5 and 1, respectively
  3. C.The C2\mathrm{C_2} molecule has four electrons in its two degenerate π\pi molecular orbitals
  4. D.H2+\mathrm{H_2^+} ion has one electron

The worked solution is part of a paid pack.

Q23openSolutions · Concentration terms, Henry's and Raoult's laws

In a one molal solution that contains 0.5 mole of a solute, there is:

  1. A.1000 g of solvent
  2. B.500 mL of solvent
  3. C.500 g of solvent✓
  4. D.100 mL of solvent

The worked solution is part of a paid pack.

Q24openAlcohols, Phenols and Ethers · Acidity and reactions of phenols

Given below are two statements:

Statement I: The acidic strength of monosubstituted nitrophenol is higher than that of phenol because of the electron-withdrawing nitro group.

Statement II: o-Nitrophenol, m-nitrophenol and p-nitrophenol will have the same acidic strength as they have one nitro group attached to the phenolic ring.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.Statement I is incorrect but Statement II is correct
  2. B.Both Statement I and Statement II are correct
  3. C.Both Statement I and Statement II are incorrect
  4. D.Statement I is correct but Statement II is incorrect✓

The worked solution is part of a paid pack.

Q25openThermodynamics · First law, enthalpy and Hess's law

Which of the following pp–VV curves represents maximum work done?

Question 75 as printed in the NEET 2022 booklet

  1. A.Curve (1)
  2. B.Curve (2)
  3. C.Curve (3)✓
  4. D.Curve (4)

The worked solution is part of a paid pack.

Q26openSome Basic Concepts of Chemistry · Stoichiometry and limiting reagent

What mass of 95% pure CaCO3\mathrm{CaCO_3} will be required to neutralise 50 mL of 0.5 M HCl solution according to the following reaction? (Calculate up to the second place of decimal.)

CaCO3(s)+2HCl(aq)→CaCl2(aq)+CO2(g)+2H2O(l)\mathrm{CaCO_3(s) + 2HCl(aq) \rightarrow CaCl_2(aq) + CO_2(g) + 2H_2O(l)}

  1. A.9.50 g
  2. B.1.25 g
  3. C.1.32 g✓
  4. D.3.65 g

The worked solution is part of a paid pack.

Q27openHaloalkanes and Haloarenes · Haloarenes: reactions and directing effects

Which of the following sequences of reactions is suitable to synthesise chlorobenzene?

Question 77 as printed in the NEET 2022 booklet

  1. A.Sequence (1)
  2. B.Benzene, Cl2\mathrm{Cl_2}, anhydrous FeCl3\mathrm{FeCl_3}✓
  3. C.Phenol, NaNO2\mathrm{NaNO_2}, HCl, CuCl
  4. D.Sequence (4)

The worked solution is part of a paid pack.

Q28openThe p-Block Elements · Group 13 and 14 elements

Which of the following statements is not correct about diborane?

  1. A.Both the boron atoms are sp2sp^2 hybridised✓
  2. B.There are two 3-centre-2-electron bonds
  3. C.The four terminal B–H bonds are two-centre two-electron bonds
  4. D.The four terminal hydrogen atoms and the two boron atoms lie in one plane

The worked solution is part of a paid pack.

Q29openAldehydes, Ketones and Carboxylic Acids · Nucleophilic addition reactions

Match List-I with List-II.

List-I (Product formed) List-II (Reaction of carbonyl compound with)
(a) Cyanohydrin (i) NH2OH\mathrm{NH_2OH}
(b) Acetal (ii) RNH2\mathrm{RNH_2}
(c) Schiff's base (iii) Alcohol
(d) Oxime (iv) HCN

Choose the correct answer from the options given below:

  1. A.(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)✓
  2. B.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  3. C.(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
  4. D.(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)

The worked solution is part of a paid pack.

Q30openElectrochemistry · Electrochemical cells and Nernst equation

At 298 K, the standard electrode potentials of Cu2+/Cu\mathrm{Cu^{2+}/Cu}, Zn2+/Zn\mathrm{Zn^{2+}/Zn}, Fe2+/Fe\mathrm{Fe^{2+}/Fe} and Ag+/Ag\mathrm{Ag^+/Ag} are 0.34 V, –0.76 V, –0.44 V and 0.80 V, respectively. On the basis of standard electrode potential, predict which of the following reactions cannot occur:

  1. A.2CuSO4(aq)+2Ag(s)→2Cu(s)+Ag2SO4(aq)\mathrm{2CuSO_4(aq) + 2Ag(s) \rightarrow 2Cu(s) + Ag_2SO_4(aq)}✓
  2. B.CuSO4(aq)+Zn(s)→ZnSO4(aq)+Cu(s)\mathrm{CuSO_4(aq) + Zn(s) \rightarrow ZnSO_4(aq) + Cu(s)}
  3. C.CuSO4(aq)+Fe(s)→FeSO4(aq)+Cu(s)\mathrm{CuSO_4(aq) + Fe(s) \rightarrow FeSO_4(aq) + Cu(s)}
  4. D.FeSO4(aq)+Zn(s)→ZnSO4(aq)+Fe(s)\mathrm{FeSO_4(aq) + Zn(s) \rightarrow ZnSO_4(aq) + Fe(s)}

The worked solution is part of a paid pack.

Q31openAldehydes, Ketones and Carboxylic Acids · Nucleophilic addition reactions

Given below are two statements:

Statement I: The boiling points of aldehydes and ketones are higher than those of hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole–dipole interactions.

Statement II: The boiling points of aldehydes and ketones are lower than those of alcohols of similar molecular masses due to the absence of H-bonding.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.Statement I is incorrect but Statement II is correct
  2. B.Both Statement I and Statement II are correct✓
  3. C.Both Statement I and Statement II are incorrect
  4. D.Statement I is correct but Statement II is incorrect

The worked solution is part of a paid pack.

Q32openChemical Bonding and Molecular Structure · VSEPR and molecular shapes

Amongst the following, which one will have maximum 'lone pair – lone pair' electron repulsions?

  1. A.XeF2\mathrm{XeF_2}✓
  2. B.ClF3\mathrm{ClF_3}
  3. C.IF5\mathrm{IF_5}
  4. D.SF4\mathrm{SF_4}

The worked solution is part of a paid pack.

Q33openCoordination Compounds · Nomenclature and Werner's theory

The IUPAC name of the complex [Ag(H2O)2][Ag(CN)2]\mathrm{[Ag(H_2O)_2][Ag(CN)_2]} is:

  1. A.diaquasilver(I) dicyanidoargentate(I)✓
  2. B.dicyanidosilver(II) diaquaargentate(II)
  3. C.diaquasilver(II) dicyanidoargentate(II)
  4. D.dicyanidosilver(I) diaquaargentate(I)

The worked solution is part of a paid pack.

Q34openThe d- and f-Block Elements · Lanthanoids and actinoids

Gadolinium has a low value of third ionisation enthalpy because of:

  1. A.High basic character
  2. B.Small size
  3. C.High exchange enthalpy✓
  4. D.High electronegativity

The worked solution is part of a paid pack.

Q35openChemical Kinetics · Rate law, order and molecularity

The given graph is a representation of the kinetics of a reaction. The yy and xx axes for zero and first order reactions, respectively, are:

Question 85 as printed in the NEET 2022 booklet

  1. A.Zero order (yy = rate and xx = concentration), first order (yy = rate and xx = t1/2t_{1/2})
  2. B.Zero order (yy = concentration and xx = time), first order (yy = t1/2t_{1/2} and xx = concentration)
  3. C.Zero order (yy = concentration and xx = time), first order (yy = rate constant and xx = concentration)
  4. D.Zero order (yy = rate and xx = concentration), first order (yy = t1/2t_{1/2} and xx = concentration)✓

The worked solution is part of a paid pack.

Q36openStructure of Atom · Bohr model and hydrogen spectrum

If the radius of the second Bohr orbit of the He+\mathrm{He^+} ion is 105.8 pm, what is the radius of the third Bohr orbit of the Li2+\mathrm{Li^{2+}} ion?

  1. A.158.7 Å
  2. B.158.7 pm✓
  3. C.15.87 pm
  4. D.1.587 pm

The worked solution is part of a paid pack.

Q37open

Match List-I with List-II.

List-I (Ores) List-II (Composition)
(a) Haematite (i) Fe3O4\mathrm{Fe_3O_4}
(b) Magnetite (ii) ZnCO3\mathrm{ZnCO_3}
(c) Calamine (iii) Fe2O3\mathrm{Fe_2O_3}
(d) Kaolinite (iv) [Al2(OH)4Si2O5]\mathrm{[Al_2(OH)_4Si_2O_5]}

Choose the correct answer from the options given below:

  1. A.(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
  2. B.(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
  3. C.(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)✓
  4. D.(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

The worked solution is part of a paid pack.

Q38openOrganic Chemistry: Some Basic Principles and Techniques · IUPAC nomenclature

The correct IUPAC name of the following compound is:

Question 89 as printed in the NEET 2022 booklet

  1. A.6-bromo-4-methyl-2-chlorohexan-4-ol
  2. B.1-bromo-5-chloro-4-methylhexan-3-ol✓
  3. C.6-bromo-2-chloro-4-methylhexan-4-ol
  4. D.1-bromo-4-methyl-5-chlorohexan-3-ol

The worked solution is part of a paid pack.

Q39openAldehydes, Ketones and Carboxylic Acids · Named reactions: aldol, Cannizzaro, Clemmensen, Wolff–Kishner

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?

Question 90 as printed in the NEET 2022 booklet

  1. A.Structure (1)
  2. B.Structure (2)
  3. C.Structure (3)✓
  4. D.Structure (4)

The worked solution is part of a paid pack.

Q40openHydrocarbons · Alkenes and alkynes: addition reactions, Markovnikov

Compound X on reaction with O3\mathrm{O_3} followed by Zn/H2O\mathrm{Zn/H_2O} gives formaldehyde and 2-methylpropanal as products. The compound X is:

  1. A.Pent-2-ene
  2. B.3-Methylbut-1-ene✓
  3. C.2-Methylbut-1-ene
  4. D.2-Methylbut-2-ene

The worked solution is part of a paid pack.

Q41openChemical Kinetics · Integrated rate equations and half-life

For a first order reaction A → Products, the initial concentration of A is 0.1 M, which becomes 0.001 M after 5 minutes. The rate constant for the reaction in min−1\mathrm{min^{-1}} is:

  1. A.0.2303
  2. B.1.3818
  3. C.0.9212✓
  4. D.0.4606

The worked solution is part of a paid pack.

Q42openEquilibrium · Law of mass action, Kc and Kp, Le Chatelier

3O2(g)⇌2O3(g)\mathrm{3O_2(g) \rightleftharpoons 2O_3(g)}

For the above reaction at 298 K, KcK_c is found to be 3.0×10−593.0 \times 10^{-59}. If the concentration of O2\mathrm{O_2} at equilibrium is 0.040 M, then the concentration of O3\mathrm{O_3} in M is:

  1. A.1.2×10211.2 \times 10^{21}
  2. B.4.38×10−324.38 \times 10^{-32}✓
  3. C.1.9×10−631.9 \times 10^{-63}
  4. D.2.4×10312.4 \times 10^{31}

The worked solution is part of a paid pack.

Q43open

The pollution due to oxides of sulphur gets enhanced due to the presence of:

(a) particulate matter

(b) ozone

(c) hydrocarbons

(d) hydrogen peroxide

Choose the most appropriate answer from the options given below:

  1. A.(a), (c), (d) only
  2. B.(a), (d) only
  3. C.(a), (b), (d) only✓
  4. D.(b), (c), (d) only

The worked solution is part of a paid pack.

Q44openAmines · Preparation and reactions; diazonium salts

The product formed from the following reaction sequence is:

Question 95 as printed in the NEET 2022 booklet

  1. A.Structure (1)✓
  2. B.Structure (2)
  3. C.Structure (3)
  4. D.Structure (4)

The worked solution is part of a paid pack.

Q45openThe d- and f-Block Elements · Potassium dichromate and permanganate

In neutral or faintly alkaline medium, KMnO4\mathrm{KMnO_4} oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from:

  1. A.+6 to +5
  2. B.+7 to +4✓
  3. C.+6 to +4
  4. D.+7 to +3

The worked solution is part of a paid pack.

Q46openAlcohols, Phenols and Ethers · Preparation and reactions of alcohols

Given below are two statements:

Statement I: In the Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl + ZnCl2\mathrm{ZnCl_2}, known as Lucas reagent.

Statement II: Primary alcohols are the most reactive and immediately produce turbidity at room temperature on reaction with Lucas reagent.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. A.Statement I is incorrect but Statement II is correct
  2. B.Both Statement I and Statement II are correct
  3. C.Both Statement I and Statement II are incorrect
  4. D.Statement I is correct but Statement II is incorrect✓

The worked solution is part of a paid pack.

Q47openCoordination Compounds · Valence bond and crystal field theory

The order of energy absorbed, which is responsible for the colour of the complexes

(A) [Ni(H2O)2(en)2]2+\mathrm{[Ni(H_2O)_2(en)_2]^{2+}}

(B) [Ni(H2O)4(en)]2+\mathrm{[Ni(H_2O)_4(en)]^{2+}} and

(C) [Ni(en)3]2+\mathrm{[Ni(en)_3]^{2+}}

is:

  1. A.(B) > (A) > (C)
  2. B.(A) > (B) > (C)
  3. C.(C) > (B) > (A)
  4. D.(C) > (A) > (B)✓

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Q48open

A 10.0 L flask contains 64 g of oxygen at 27 °C (assume O2\mathrm{O_2} gas is behaving ideally). The pressure inside the flask in bar is (given R=0.0831 L bar K−1 mol−1R = 0.0831\ \mathrm{L\,bar\,K^{-1}\,mol^{-1}}):

  1. A.4.9✓
  2. B.2.5
  3. C.498.6
  4. D.49.8

The worked solution is part of a paid pack.

Q49open

Copper crystallises in an fcc unit cell with cell edge length of 3.608×10−83.608 \times 10^{-8} cm. The density of copper is 8.92 g cm−38.92\ \mathrm{g\,cm^{-3}}. Calculate the atomic mass of copper.

  1. A.65 u
  2. B.63.1 u✓
  3. C.31.55 u
  4. D.60 u

The worked solution is part of a paid pack.