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JEE Main 2024 Apr 6 Shift 1 — Chemistry

30 questions · 30 with the official NTA answer

Q61JEE Main 2024 Apr 6 Shift 1SolutionsMedium

The density of 'xx' M solution ('xx' molar) of NaOH is 1.12 g mL−11.12 \mathrm{~g~mL^{-1}}, while in molality, the concentration of the solution is 3 m3 \mathrm{~m} (3 molal). Then xx is

(Given : Molar mass of NaOH is 40 g/mol40 \mathrm{~g/mol})

  1. A

    3.5

  2. B

    3.8

  3. C

    3.0

  4. D

    2.8

Show answer

Correct option: C

Q62JEE Main 2024 Apr 6 Shift 1Chemical Bonding and Molecular StructureMedium

Match List I with List II

LIST I (Molecule / Species) LIST II (Property / Shape)
A. SO2Cl2\mathrm{SO_2Cl_2} I. Paramagnetic
B. NO\mathrm{NO} II. Diamagnetic
C. NO2−\mathrm{NO_2^-} III. Tetrahedral
D. I3−\mathrm{I_3^-} IV. Linear

Choose the correct answer from the options given below:

  1. A

    A-III, B-IV, C-II, D-I

  2. B

    A-III, B-I, C-II, D-IV

  3. C

    A-II, B-III, C-I, D-IV

  4. D

    A-IV, B-I, C-III, D-II

Show answer

Correct option: B

Q63JEE Main 2024 Apr 6 Shift 1EquilibriumMedium

At −20 ∘C-20\ ^{\circ}\mathrm{C} and 1 atm pressure, a cylinder is filled with equal number of H2\mathrm{H_2}, I2\mathrm{I_2} and HI\mathrm{HI} molecules for the reaction

H2(g)+I2(g)⇌2HI(g)\mathrm{H_2(g) + I_2(g) \rightleftharpoons 2HI(g)}, the Kp\mathrm{K_p} for the process is x×10−1x \times 10^{-1}.

x=x = ________.

[Given : R=0.082 L atm K−1 mol−1\mathrm{R} = 0.082 \mathrm{~L~atm~K^{-1}~mol^{-1}}]

  1. A

    1

  2. B

    10

  3. C

    0.01

  4. D

    2

Show answer

Correct option: B

Q64JEE Main 2024 Apr 6 Shift 1p-Block ElementsEasy

Which of the following material is not a semiconductor.

  1. A

    Copper oxide

  2. B

    Graphite

  3. C

    Germanium

  4. D

    Silicon

Show answer

Correct option: B

Q65JEE Main 2024 Apr 6 Shift 1Redox Reactions and ElectrochemistryMedium

A conductivity cell with two electrodes (dark side) are half filled with infinitely dilute aqueous solution of a weak electrolyte. If volume is doubled by adding more water at constant temperature, the molar conductivity of the cell will -

Figure — described from the original paper

a cubic conductivity cell of dimensions 1 cm × 1 cm × 1 cm with two shaded (dark) electrode plates on opposite faces, marked (+) and (−)

  1. A

    increase sharply

  2. B

    decrease sharply

  3. C

    remain same or can not be measured accurately

  4. D

    depend upon type of electrolyte

Show answer

Correct option: C

Q66JEE Main 2024 Apr 6 Shift 1Classification of Elements and PeriodicityMedium

The electron affinity value are negative for

A. Be→Be−\mathrm{Be \rightarrow Be^-} B. N→N−\mathrm{N \rightarrow N^-} C. O→O2−\mathrm{O \rightarrow O^{2-}} D. Na→Na−\mathrm{Na \rightarrow Na^-} E. Al→Al−\mathrm{Al \rightarrow Al^-}

Choose the most appropriate answer from the options given below :

  1. A

    A, B and C only

  2. B

    D and E only

  3. C

    A and D only

  4. D

    A, B, D and E only

Show answer

Correct option: B

Q67JEE Main 2024 Apr 6 Shift 1p-Block ElementsMedium

Given below are two statements :

Statement I : Gallium is used in the manufacturing of thermometers.

Statement II : A thermometer containing gallium is useful for measuring the freezing point (256 K) of brine solution.

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

  1. A

    Both Statement I and Statement II are true

  2. B

    Both Statement I and Statement II are false

  3. C

    Statement I is true but Statement II is false

  4. D

    Statement I is false but Statement II is true

Show answer

Correct option: C

Q68JEE Main 2024 Apr 6 Shift 1Chemical Bonding and Molecular StructureMedium

Match List I with List II

LIST I (Compound/Species) LIST II (Shape/Geometry)
A. SF4\mathrm{SF_4} I. Tetrahedral
B. BrF3\mathrm{BrF_3} II. Pyramidal
C. BrO3−\mathrm{BrO_3^-} III. See saw
D. NH4+\mathrm{NH_4^+} IV. Bent T-Shape

Choose the correct answer from the options given below:

  1. A

    A-II, B-IV, C-III, D-I

  2. B

    A-III, B-II, C-IV, D-I

  3. C

    A-III, B-IV, C-II, D-I

  4. D

    A-II, B-III, C-I, D-IV

Show answer

Correct option: C

Q69JEE Main 2024 Apr 6 Shift 1d- and f-Block ElementsEasy

The number of element from the following that do not belong to lanthanoids is

Eu, Cm, Er, Tb, Yb and Lu

  1. A

    5

  2. B

    1

  3. C

    3

  4. D

    4

Show answer

Correct option: B

Q70JEE Main 2024 Apr 6 Shift 1Chemical Bonding and Molecular StructureEasy

Match List I with List II

LIST I (Hybridization) LIST II (Orientation in Space)
A. sp3\mathrm{sp^3} I. Trigonal bipyramidal
B. dsp2\mathrm{dsp^2} II. Octahedral
C. sp3d\mathrm{sp^3d} III. Tetrahedral
D. sp3d2\mathrm{sp^3d^2} IV. Square planar

Choose the correct answer from the options given below:

  1. A

    A-III, B-IV, C-I, D-II

  2. B

    A-III, B-I, C-IV, D-II

  3. C

    A-IV, B-III, C-I, D-II

  4. D

    A-II, B-I, C-IV, D-III

Show answer

Correct option: A

Q71JEE Main 2024 Apr 6 Shift 1Coordination CompoundsMedium

Consider the following complexes

[CoCl(NH3)5]2+\mathrm{[CoCl(NH_3)_5]^{2+}}, [Co(CN)6]3−\mathrm{[Co(CN)_6]^{3-}}, [Co(NH3)5(H2O)]3+\mathrm{[Co(NH_3)_5(H_2O)]^{3+}}, [Cu(H2O)4]2+\mathrm{[Cu(H_2O)_4]^{2+}}

(A)     (B)     (C)     (D)

The correct order of A, B, C and D in terms of wavenumber of light absorbed is :

  1. A

    D<A<C<B\mathrm{D < A < C < B}

  2. B

    B<C<A<D\mathrm{B < C < A < D}

  3. C

    C<D<A<B\mathrm{C < D < A < B}

  4. D

    A<C<B<D\mathrm{A < C < B < D}

Show answer

Correct option: A

Q72JEE Main 2024 Apr 6 Shift 1Principles Related to Practical ChemistryMedium

Match List I with List II

LIST I (Precipitating reagent and conditions) LIST II (Cation)
A. NH4Cl+NH4OH\mathrm{NH_4Cl + NH_4OH} I. Mn2+\mathrm{Mn^{2+}}
B. NH4OH+Na2CO3\mathrm{NH_4OH + Na_2CO_3} II. Pb2+\mathrm{Pb^{2+}}
C. NH4OH+NH4Cl+H2S\mathrm{NH_4OH + NH_4Cl + H_2S} gas III. Al3+\mathrm{Al^{3+}}
D. dilute HCl IV. Sr2+\mathrm{Sr^{2+}}

Choose the correct answer from the options given below:

  1. A

    A-III, B-IV, C-II, D-I

  2. B

    A-III, B-IV, C-I, D-II

  3. C

    A-IV, B-III, C-II, D-I

  4. D

    A-IV, B-III, C-I, D-II

Show answer

Correct option: B

Q73JEE Main 2024 Apr 6 Shift 1Purification and Characterisation of Organic CompoundsMedium

Which of the following statements are correct?

A. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point. B. Aniline can be purified by steam distillation as aniline is miscible in water. C. Ethanol can be separated from ethanol water mixture by azeotropic distillation because it forms azeotrope. D. An organic compound is pure, if mixed M.P. is remained same.

Choose the most appropriate answer from the options given below :

  1. A

    A, B, C only

  2. B

    A, B, D only

  3. C

    A, C, D only

  4. D

    B, C, D only

Show answer

Correct option: C

Q74JEE Main 2024 Apr 6 Shift 1Some Basic Principles of Organic ChemistryMedium

Which of the following is metamer of the given compound (X)?

Figure — described from the original paper

compound (X) — a benzene ring attached through NH to a carbonyl bonded to a cyclohexane ring, i.e. C6H5−NH−CO−C6H11\mathrm{C_6H_5{-}NH{-}CO{-}C_6H_{11}} (N-phenyl cyclohexanecarboxamide)

  1. A
    Figure — described from the original paper

    cyclohexyl–NH–CO–phenyl, i.e. C6H11−NH−CO−C6H5\mathrm{C_6H_{11}{-}NH{-}CO{-}C_6H_5}

  2. B
    Figure — described from the original paper

    cyclohexyl–NH–CO–cyclohexyl, i.e. C6H11−NH−CO−C6H11\mathrm{C_6H_{11}{-}NH{-}CO{-}C_6H_{11}}

  3. C
    Figure — described from the original paper

    phenyl–NH–CO–phenyl, i.e. C6H5−NH−CO−C6H5\mathrm{C_6H_5{-}NH{-}CO{-}C_6H_5}

  4. D
    Figure — described from the original paper

    a benzene ring bearing a –CHO group and an –NH–cyclohexyl group, i.e. OHC−C6H4−NH−C6H11\mathrm{OHC{-}C_6H_4{-}NH{-}C_6H_{11}}

Show answer

Correct option: A

Q75JEE Main 2024 Apr 6 Shift 1Some Basic Principles of Organic ChemistryEasy

Functional group present in sulphonic acids is :

  1. A

    −SO2\mathrm{-SO_2}

  2. B

    −SO4H\mathrm{-SO_4H}

  3. C

    −SO3H\mathrm{-SO_3H}

  4. D
    Figure — described from the original paper

    −S(=O)−OH\mathrm{-S({=}O){-}OH}, sulfur bonded to –OH with one double-bonded oxygen

Show answer

Correct option: C

Q76JEE Main 2024 Apr 6 Shift 1Organic Compounds Containing HalogensEasy

Match List I with List II

LIST I (Compound) LIST II (Uses)
A. Iodoform I. Fire extinguisher
B. Carbon tetrachloride II. Insecticide
C. CFC III. Antiseptic
D. DDT IV. Refrigerants

Choose the correct answer from the options given below:

  1. A

    A-II, B-IV, C-I, D-III

  2. B

    A-III, B-II, C-IV, D-I

  3. C

    A-III, B-I, C-IV, D-II

  4. D

    A-I, B-II, C-III, D-IV

Show answer

Correct option: C

Q77JEE Main 2024 Apr 6 Shift 1Organic Compounds Containing OxygenMedium

Given below are two statements :

Statement I : Piciric acid is 2,4,6 - trinitrotoluene.

Statement II : Phenol - 2,4 - disulphonic acid is treated with Conc. HNO3\mathrm{HNO_3} to get picric acid.

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

  1. A

    Both Statement I and Statement II are correct

  2. B

    Both Statement I and Statement II are incorrect

  3. C

    Statement I is correct but Statement II is incorrect

  4. D

    Statement I is incorrect but Statement II is correct

Show answer

Correct option: D

Q78JEE Main 2024 Apr 6 Shift 1Organic Compounds Containing OxygenMedium

In Reimer - Tiemann reaction, phenol is converted into salicylaldehyde through an intermediate. The structure of intermediate is ________.

  1. A
    Figure — described from the original paper

    phenol (–OH) with a −CHCl2\mathrm{-CHCl_2} group at the ortho position

  2. B
    Figure — described from the original paper

    sodium phenoxide (O−Na+\mathrm{O^-Na^+}) with a –CHO group at the ortho position

  3. C
    Figure — described from the original paper

    sodium phenoxide (O−Na+\mathrm{O^-Na^+}) with a −CH3\mathrm{-CH_3} group at the ortho position

  4. D
    Figure — described from the original paper

    sodium phenoxide (O−Na+\mathrm{O^-Na^+}) with a −CHCl2\mathrm{-CHCl_2} group at the ortho position

Show answer

Correct option: D

Q79JEE Main 2024 Apr 6 Shift 1Organic Compounds Containing OxygenEasy

Which among the following aldehydes is most reactive towards nucleophilic addition reactions?

  1. A

    H−CHO\mathrm{H{-}CHO}

  2. B

    CH3−CHO\mathrm{CH_3{-}CHO}

  3. C

    C2H5−CHO\mathrm{C_2H_5{-}CHO}

  4. D

    C3H7−CHO\mathrm{C_3H_7{-}CHO}

Show answer

Correct option: A

Q80JEE Main 2024 Apr 6 Shift 1BiomoleculesMedium

DNA molecule contains 4 bases whose structure are shown below. One of the structures is not correct, identify the incorrect base structure.

  1. A
    Figure — described from the original paper

    adenine — a purine ring system bearing an −NH2\mathrm{-NH_2} group

  2. B
    Figure — described from the original paper

    a guanine-like purine ring system (C=O, NH and −NH2\mathrm{-NH_2} groups) additionally bearing an H3C−\mathrm{H_3C-} (methyl) group on the five-membered-ring carbon

  3. C
    Figure — described from the original paper

    cytosine — a pyrimidine ring with an −NH2\mathrm{-NH_2} group and a C=O group

  4. D
    Figure — described from the original paper

    thymine — a pyrimidine-2,4-dione ring with a 5-methyl (H3C−\mathrm{H_3C-}) group

Show answer

Correct option: B

Q81JEE Main 2024 Apr 6 Shift 1Atomic StructureMediumNumerical

Frequency of the de-Broglie wave of electron in Bohr's first orbit of hydrogen atom is __________ ×1013\times 10^{13} Hz (nearest integer).

[Given : RH\mathrm{R_H} (Rydberg constant) =2.18×10−18= 2.18 \times 10^{-18} J, hh (Plank's constant) =6.6×10−34= 6.6 \times 10^{-34} J.s.]

Show answer

Answer: 661

Q82JEE Main 2024 Apr 6 Shift 1Chemical Bonding and Molecular StructureEasyNumerical

Number of molecules from the following which can exhibit hydrogen bonding is ________. (nearest integer)

CH3OH\mathrm{CH_3OH}, H2O\mathrm{H_2O}, C2H6\mathrm{C_2H_6}, C6H6\mathrm{C_6H_6},

Figure — described from the original paper

benzene ring with −NO2\mathrm{-NO_2} and −OH\mathrm{-OH} on adjacent positions (o-nitrophenol)

, HF\mathrm{HF}, NH3\mathrm{NH_3}

Show answer

Answer: 5

Q83JEE Main 2024 Apr 6 Shift 1Chemical ThermodynamicsMediumNumerical

An ideal gas, Cˉv=52R\bar{C}_v = \frac{5}{2}R, is expanded adiabatically against a constant pressure of 1 atm untill it doubles in volume. If the initial temperature and pressure is 298 K and 5 atm, respectively then the final temperature is _________ K (nearest integer).

[Cˉv\bar{C}_v is the molar heat capacity at constant volume]

Show answer

Answer: 274

Q84JEE Main 2024 Apr 6 Shift 1SolutionsMediumNumerical

Consider the dissociation of the weak acid HX as given below

HX(aq)⇌H+(aq)+X−(aq)\mathrm{HX(aq) \rightleftharpoons H^+(aq) + X^-(aq)}, Ka=1.2×10−5\mathrm{K_a} = 1.2 \times 10^{-5}

[Ka\mathrm{K_a} : dissociation constant]

The osmotic pressure of 0.03 M aqueous solution of HX at 300 K is _________ ×10−2\times 10^{-2} bar (nearest integer).

[Given : R=0.083 L bar mol−1 K−1\mathrm{R} = 0.083 \mathrm{~L~bar~mol^{-1}~K^{-1}}]

Show answer

Answer: 76

Q85JEE Main 2024 Apr 6 Shift 1Chemical KineticsEasyNumerical

Time required for 99.9% completion of a first order reaction is _________ times the time required for completion of 90% reaction.(nearest integer)

Show answer

Answer: 3

Q86JEE Main 2024 Apr 6 Shift 1d- and f-Block ElementsMediumNumerical

Among CrO\mathrm{CrO}, Cr2O3\mathrm{Cr_2O_3} and CrO3\mathrm{CrO_3}, the sum of spin-only magnetic moment values of basic and amphoteric oxides is _______ 10−210^{-2} BM (nearest integer).

(Given atomic number of Cr is 24)

Show answer

Answer: 877

Q87JEE Main 2024 Apr 6 Shift 1d- and f-Block ElementsMediumNumerical

The difference in the 'spin-only' magnetic moment values of KMnO4\mathrm{KMnO_4} and the manganese product formed during titration of KMnO4\mathrm{KMnO_4} against oxalic acid in acidic medium is ________ BM. (nearest integer)

Show answer

Answer: 6

Q88JEE Main 2024 Apr 6 Shift 1HydrocarbonsMediumNumerical

The major product of the following reaction is P.

CH3C≡C−CH3→(ii) dil. KMnO4273 K(i) Na/liq. NH3’P’\mathrm{CH_3C \equiv C{-}CH_3} \xrightarrow[\substack{\text{(ii) dil. } \mathrm{KMnO_4} \\ 273\ \mathrm{K}}]{\text{(i) Na/liq. } \mathrm{NH_3}} \text{'P'}

Number of oxygen atoms present in product 'P' is ________. (nearest integer)

Show answer

Answer: 2

Q89JEE Main 2024 Apr 6 Shift 1HydrocarbonsHardNumerical

The major products from the following reaction sequence are product A and product B.

Figure — described from the original paper

cyclohexene at the centre undergoing two separate reaction sequences — to the right: (i) Br2\mathrm{Br_2}, (ii) HC≡C−CH2−O−Na+\mathrm{HC{\equiv}C{-}CH_2{-}O^-Na^+} (1.0 eq.) giving A; to the left: (i) Br2\mathrm{Br_2}, (ii) alc. KOH (3 eq.) giving B

The total sum of π\pi electrons in product A and product B are _________ (nearest integer)

Show answer

Answer: 8

Q90JEE Main 2024 Apr 6 Shift 1Organic Compounds Containing NitrogenMediumNumerical

9.3 g of pure aniline upon diazotisation followed by coupling with phenol gives an orange dye. The mass of orange dye produced (assume 100% yield/conversion) is _________ g. (nearest integer)

Show answer

Answer: 20

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