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Chemistry

In Hall-Heroult process, the following is used for reducing \( \mathrm{Al_2O_3} \) :

Arrange the following gases in increasing order of vander Waals constant \( 'a' \)
A. \( \mathrm{Ar} \) B. \( \mathrm{CH_4} \) C. \( \mathrm{H_2O} \) D. \( \mathrm{C_6H_6} \)
Choose the correct option from the following:

33.

The correct order of reactivity of following haloarenes towards nucleophilic substitution with aqueous \( \mathrm{NaOH} \) is:

Chosse the correct answer from the options given below:

34.

The correct reaction profile diagram for a positive catalyst reaction.

35.

Which of these reaction is not a part of breakdown of ozone in stratosphere?

36.

The descending order of acidity for the following carboxylic acid is:
A \( \mathrm{CH_3COOH} \) B \( \mathrm{F_3C{-}COOH} \) C \( \mathrm{ClCH_2{-}COOH} \) D \( \mathrm{FCH_2{-}COOH} \) E \( \mathrm{BrCH_2{-}COOH} \)
Choose the correct answer from the options given below:

37.

The product \( (P) \) formed from the following multistep reaction is:

38.

Given below are two statements:
Statement I: Methyl orange is a weak acid.
Statement II: The benzenoid form of methyl orange is more intensity / deeply coloured than the quinonoid from.
In the light of the above statement, choose the most appropriate answer from the options given below:

39.

Given below are two statements:
Statement I: In redox titration, the indicators used are sensitive to change in pH of the solutions
Statement II: In acid – base titration, the indicators used are sensitive to change in oxidation potential.
In the light of the above statements, choose the most appropriate answer from the Option given below

40.

The statement/s which are true about antagonists from the following is/are:
A. They bind to the receptor site.
B. Get transferred inside the cell for their action
C. Inhibit the natural communication of the body
D. Mimic the natural messenger
Choose the correct answer from the options given below:

41.

Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is:
Given \( v \) = frequency of X-ray emitted
\( Z \) = atomic number

42.

Major product ‘\( P \)’ formed in the following reaction is:

43.

Match List I with List II.

List I	List II
Natural amino acid	One letter code
A Glutamic aid	I Q
B Glutamine	II W
C Tyrosine	III E
D Tryptophan	IV Y

Choose the correct answer from the options given below:

44.

Match List I with List II.

List I	List II
Coordination Complex	Number of unpaired electrons
A \( [\mathrm{Cr}(\mathrm{CN})_6]^{3-} \)	I \( 0 \)
B \( [\mathrm{Fe}(\mathrm{H}_2\mathrm{O})_6]^{2+} \)	II \( 3 \)
C \( [\mathrm{Co}(\mathrm{NH}_3)_6]^{3+} \)	III \( 2 \)
D \( [\mathrm{Ni}(\mathrm{NH}_3)_6]^{2+} \)	IV \( 4 \)

Choose the correct answer from the options given below :

45.

The correct IUPAC nomenclature for the following compound is:

46.

Which of the following can reduce decomposition of \( \mathrm{H}_2\mathrm{O}_2 \) on exposure to light?

47.

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Sodium is about \( 30 \) times as abundant as potassium in the oceans.
Reason R : Potassium is bigger in size than sodium.
In the light of the above statements, choose the correct answer from the option given below

48.

Which of the following have same number of significant figures?
A \( 0.00253 \) B \( 1.0003 \) C \( 15.0 \) D \( 163 \)
Choose the correct answer from the options given below:

49.

A compound ‘\( X \)’ when treated with phthalic anhydride in presence of concentrated \( \mathrm{H_2SO_4} \) yields ‘\( Y \)’. ‘\( Y \)’ is used as an acid base indicator.‘\( X \)’ and ‘\( Y \)’ are respectively.

50.

For a good quality element, the ratio of lime to the total of the oxides of \( \mathrm{Si} \), \( \mathrm{Al} \) and \( \mathrm{Fe} \) should be as close as to:

51.

For complete combustion of ethene, \( \mathrm{C_2H_4(g)} + \mathrm{3O_2(g)} \longrightarrow \mathrm{2CO_2(g)} + \mathrm{2H_2O(l)} \) the amount of heat produced as measured in bomb calorimeter is \( 1406 \, \mathrm{kJ\, mol^{-1}} \) at \( 300 \, \mathrm{K} \). The minimum value of \( \mathrm{T\Delta S} \) needed to reach equilibrium is (–) ________ \( \mathrm{kJ} \) (Nearest integer)
Given: \( R = 8.3 \, \mathrm{J\,K^{-1}\,mol^{-1}} \)

52.

Coagulating value of the electrolytes \( \mathrm{AlCl_3} \) and \( \mathrm{NaCl} \) for \( \mathrm{As_2S_3} \) are \( 0.09 \) and \( 50.04 \) respectively. The coagulating power of \( \mathrm{AlCl_3} \) is \( x \) times the coagulating power of \( \mathrm{NaCl} \). The value of \( x \) is _________.

53.

The number of species from the following carrying a single lone pair on central atom Xenon is ________.
\( \mathrm{XeF_5^+}, \mathrm{XeO_3}, \mathrm{XeO_2F_2}, \mathrm{XeF_5^-}, \mathrm{XeO_3F_2}, \mathrm{XeOF_4}, \mathrm{XeF_4} \)

54.

If the boiling points of two solvents \( X \) and \( Y \) (having same molecular weights) are in the ratio \( 2:1 \) and their enthalpy of vaporizations are in the ratio \( 1:2 \), then the boiling point elevation constant of \( X \) is \( m \) times the boiling point elevation constant of \( Y \). The value of \( m \) is _____________ (nearest integer)

55.

The observed magnetic moment of the complex \( [\mathrm{Mn}(\mathrm{NCS})_6]^{x-} \) is \( 6.06 \, \mathrm{BM} \). The numerical value of \( x \) is _______.

56.

The sum of oxidation state of the metals in \( \mathrm{Fe(CO)_5} \), \( \mathrm{VO^{2+}} \) and \( \mathrm{WO_3} \) is __________.

57.

The ratio of sigma and \( \pi \) bonds present in pyrophosphoric acid is______________.

58.

The number of atomic orbitals from the following having \( 5 \) radial nodes is __________.
\( 7s \), \( 7p \), \( 6s \), \( 8p \), \( 8d \)

59.

The solubility product of \( \mathrm{BaSO_4} \) is \( 1 \times 10^{-10} \) at \( 298 \, \mathrm{K} \). The solubility of \( \mathrm{BaSO_4} \) in \( 0.1 \, \mathrm{M} \, \mathrm{K_2SO_4(aq)} \) solution is ______ \( \times 10^{-9} \, \mathrm{g\, L^{-1}} \) (nearest integer).
Given : Molar mass of \( \mathrm{BaSO_4} \) is \( 233 \, \mathrm{g \, mol^{-1}} \)

60.

The number of incorrect statements from the following is__________
A The electrical work that a reaction can perform at constant pressure and temperature is equal to the reaction Gibbs energy
B \( E_\text{cell}^{\circ} \) is dependent on the pressure
C \( \displaystyle \dfrac{\text{d}E^\ominus_{\text{cell}}}{\text{dT}} = \dfrac{\Delta_r S^\ominus}{nF} \)
D A cell is operating reversibly if the cell potential is exactly balanced by an opposing source of potential difference.

JEE Main 2023 8th April Evening Shift

Physics Chemistry Mathematics

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