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Chemistry

The product obtained from the electrolytic oxidation of acidified sulphate solutions, is:

Consider the above reaction and identify the product \( P \):

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Lithium halides are some what covalent in nature
Reason R: Lithium possess high polarisation capability
In the light of the above statements, choose the most appropriate answer from the options given below:

34.

The oxidation state of \( 'P' \) in \( \mathrm{H_4P_2O_7} \), \( \mathrm{H_4P_2O_5} \) and \( \mathrm{H_4P_2O_6} \) respectively, are:

35.

The number of geometrical isomers found in the metal complexes \( [\mathrm{PtCl_2(NH_3)_2}] \), \( [\mathrm{Ni(CO)_4}] \), \( [\mathrm{Ru(H_2O)_3Cl_3}] \), and \( [\mathrm{CoCl_2(NH_3)_4}]^{+} \) respectively, are:

36.

The type of hybridisation and magnetic property of the complex \( [\mathrm{MnCl_6}]^{3-} \), respectively, are:

37.

Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction:

38.

Which one among the following chemical test is used to distinguish monosaccharide from disaccharide?

39.

Given below are two statements :
Statement-I : Aniline is less basic than acetamide.
Statement-II : In aniline, the lone pair of electrons on nitrogen atom is delocalized over benzene ring due to resonance and hence less available to a proton.
Choose the most appropriate option :

40.

Which one of the following compounds will give orange precipitate when treated with \( 2,4 \)-dinitrophenyl hydrazine?

41.

For a reaction of order \( n \), the units of the rate constant is :

42.

Match List-I with List-II :

Choose the most appropriate answer from the options given below :

43.

The correct order of stability of given carbocations is :

44.

Given below are two statements :
Statement-I : Rutherford’s gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement-II : Bohr’s model of hydrogen atom contradicts Heisenberg’s uncertainly principle.
In the light of the above statements, choose the most appropriate answer from the options given below :

45.

The statement that is INCORRECT about Ellingham diagram is :

46.

The parameters of the unit cell of a substance are \( a = 2.5 \), \( b = 3.0 \), \( c = 4.0 \), \( \alpha = 90^\circ \), \( \beta = 120^\circ \), \( \gamma = 90^\circ \). The crystal system of the substance is :

47.

Staggered and eclipsed conformers of ethane are :

48.

The compound ‘A’ is a complementary base of ________ in DNA strands.

49.

Match List-I with List-II :

List-I (Drug)	List-II (Class of Drug)
(a) Furacin	(i) Antibiotic
(b) Arsphenamine	(ii) Tranquilizers
(c) Dimetone	(iii) Antiseptic
(d) Valium	(iv) Synthetic antihistamines

Choose the most appropriate match :

50.

Which of the following statements is NOT correct ?

51.

\( 1.46 \)\( \text{g} \) of a biopolymer dissolved in a \( 100 \) \( \text{mL} \) water \( 300 \)\( \text{K} \) exerted an osmotic pressure of \( 2.42 \times 10^{-3} \) \( \text{bar} \).
The molar mass of the biopolymer is ______ \( \times 10^{4} \) \( \text{g mol}^{-1} \). (Round off to the Nearest Integer)
[Use : \( R = 0.083 \) \( \text{L bar mol}^{-1} \text{K}^{-1} \)]

52.

For water at \( 100^\circ \text{C} \) and \( 1 \) \( \text{bar} \), \( \Delta_{\text{vap}}H - \Delta_{\text{vap}}U = \) ______ \( \times 10^{2} \) \( \text{J mol}^{-1} \). (Round off to the Nearest Integer)
[Use : \( R = 8.31 \) \( \text{J mol}^{-1} \text{K}^{-1} \)]
[Assume volume of \( \mathrm{H_2O{(l)}} \) is much smaller than volume of \( \mathrm{H_2O{(g)}} \). Assume \( \mathrm{H_2O{(g)}} \) can be treated as an ideal gas]

53.

\( \mathrm{CO_2} \) gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of \( \mathrm{CO_2} \) adsorbed becomes \( 64 \) times when the pressure of \( \mathrm{CO_2} \) is doubled. The value of \( n \) in the Freundlich isotherm equation is ______ \( \times 10^{-2} \). (Round off to the Nearest Integer)

54.

The difference between bonds order of \( \mathrm{CO} \) and \( \mathrm{NO^+} \) is \( \dfrac{x}{2} \) where \( x = \) ______. (Round off to the Nearest Integer)

55.

The number of geometrical isomers possible in triamminenitritocobalt \( (\text{III}) \) is \( X \) and in trioxalatochromate \( (\text{III}) \) is \( Y \). Then the value of \( X + Y \) is ________.

56.

The conductivity of a weak acid HA of concentration \( 0.001 \, \text{mol L}^{-1} \) is \( 2.0 \times 10^{-5} \, \text{S cm}^{-1} \). If \( \Lambda_m^{\circ} (\text{HA}) = 190 \, \text{S cm}^2 \text{ mol}^{-1} \), the ionization constant \( (K_a) \) of HA is equal to _______ \( \times 10^{-6} \). (Round off to the Nearest Integer)

57.

In gaseous triethyl amine the "\( \mathrm{-C-N-C-} \)" bond angle is _______ degree.

58.

An organic compound is subjected to chlorination to get compound \( A \) using \( 5.0 \, \text{g} \) of chlorine. When \( 0.5 \, \text{g} \) of compound \( A \) is reacted with \( \text{AgNO}_3 \) [Carius Method], the percentage of chlorine in compound \( A \) is ________ when it forms \( 0.3849 \, \text{g} \) of \( \text{AgCl} \). (Round off to the Nearest Integer) (Atomic masses of Ag and Cl are \( 107.87 \) and \( 35.5 \) respectively)

59.

The density of \( \text{NaOH} \) solution is \( 1.2 \, \text{g cm}^{-3} \). The molality of this solution is ________ \( \text{m} \). (Round off to the Nearest Integer)
[Use: Atomic masses: Na: \( 23.0 \, \text{u} \) O: \( 16.0 \, \text{u} \) H: \( 1.0 \, \text{u} \); Density of \( \text{H}_2\text{O} \): \( 1.0 \, \text{g cm}^{-1} \)]

60.

\( \text{PCl}_5 \rightleftharpoons \text{PCl}_3 + \text{Cl}_2 \quad K_c = 1.844 \)
\( 3.0 \) moles of \( \text{PCl}_5 \) is introduced in a \( 1 \, \text{L} \) closed reaction vessel at \( 380 \, \text{K} \). The number of moles of \( \text{PCl}_5 \) at equilibrium is ________ \( \times 10^{-3} \). (Round off to the Nearest Integer)

JEE Main 2021 27th July Morning Shift

Physics Chemistry Mathematics

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