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Chemistry

\( 250 \, \text{g} \) solution of D-glucose in water contains \( 10.8\% \) of carbon by weight. The molality of the solution is nearest to (Given: Atomic Weights are, H, \( 1\,\text{u} \); C, \( 12\,\text{u} \), O, \( 16\,\text{u} \)).

32.

Given below are two statements:
Statement I: \( \mathrm{O_2}, \mathrm{Cu}^{2+} \) and \( \mathrm{Fe}^{3-} \) are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
Statement II: \( \mathrm{NaCl} \) and \( \mathrm{H_2O} \) are weakly magnetized in opposite direction to magnetic field.
In the light of the above statements, choose the most appropriate answer from the option given below:

33.

Given below are two statements. One is labeled as Assertion A and the other is labeled as Reason R.
Assertion A: Energy of \( 2s \) orbital of hydrogen atom is greater than that of \( 2s \) orbital of lithium.
Reason R: Energies of the orbitals in the same subshell decrease with increase in the atomic number.
In the light of the above statements, choose the correct answer from the options given below:

34.

Given below are two statements. One is labeled as Assertion and the other is labeled as Reason R.
Assertion A: Activated charcoal adsorbs \( \mathrm{SO_2} \) more efficiently than \( \mathrm{CH_4} \).
Reason R: Gases with lower critical temperatures are readily adsorbed by activated charcoal.
In the light of the above statements, choose the correct answer from the options.

35.

Boiling point of a \( 2\% \) aqueous solution of a non-volatile solute A is equal to the boiling point of \( 8\% \) aqueous solution of a non-volatile solute B. The relation between molecular weights of A and B is:

36.

The incorrect statement is:

37.

Which of the following methods are not used to refine any metal?
(I) Liquation (II) Calcination
(III) Electrolysis (IV) Leaching
(V) Distillation
Choose the correct answer from the options given below:

38.

Given below are two statements:
Statement I: Hydrogen peroxide can act as an oxidizing agent in both acidic and basic conditions.
Statement II: Density of hydrogen peroxide at \( 298 \, \text{K} \) is lower than that of \( \mathrm{D_2O} \).
In the light of the above statements, choose the correct answer from the options given below:

39.

Given below are two statements:
Statement I: The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases.
Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions
In the light of the above statements, choose the correct answer from the options given below:

40.

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

41.

Given below are two statements.
Statement I: Iron (\( \text{III} \)) catalyst, acidified \( \mathrm{K_2Cr_2O_7} \) and neutral \( \mathrm{KMnO_4} \) have the ability to oxidise \( \mathrm{I^-} \) and \( \mathrm{I_2} \) independently.
Statement II: Manganate ion is paramagnetic in nature and involves \( p\pi - p\pi \) bonding.
In the light of the above statements, choose the correct answer from the options given below:

42.

The total number of \( \mathrm{Mn} = \mathrm{O} \) bonds in \( \mathrm{Mn_2O_7} \) is ______.

43.

Match List I with List II:

List – I (Pollutant)	List – II (Disease / Sickness)
(a) Sulphate (\( > 500 \, \text{ppm} \))	(i) Methemoglobinemia
(b) Nitrate (\( > 50 \, \text{ppm} \))	(ii) Brown mottling of teeth
(c) Lead (\( > 50 \, \text{ppb} \))	(iii) Laxative effect
(d) Fluoride (\( > 2 \, \text{ppm} \))	(iv) Kidney damage

Choose the correct answer from the options given below:

44.

Given below are two statements: one is labelled as Assertion A and, the other is labelled as Reason R.
Assertion A: \( [6] \) Annulene, \( [8] \) Annulene and cis-\( [10] \) Annulene, are respectively aromatic, not-aromatic and aromatic.

Reason R: Planarity is one of the requirements of aromatic systems.
In the light of the above statements, choose the most appropriate answer from the options given below:

45.

In the below reaction product \( \mathrm{B} \) is:

46.

Match List \(-\) I with List \(-\) II:

Choose the correct answer from the options given below:

47.

A sugar ‘\( X \)’ dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after sometime. Sugar ‘\( X \)’ is:

48.

Match List \(-\) I with List \(-\) II:

Choose the correct answer from the options given below:

49.

In Carius method of estimation of halogen, \(0.45\,\text{g}\) of an organic compound gave \(0.36\,\text{g}\) of \(\mathrm{AgBr}\). Find out the percentage of bromine in the compound.
[Molar masses: \(\mathrm{AgBr}=188\,\mathrm{g\,mol^{-1}}\); \(\mathrm{Br}=80\,\mathrm{g\,mol^{-1}}\)]

50.

Match List – I with List – II:

List – I	List – II
(a) Benzenesulphonyl chloride	(i) Test for primary amines
(b) Hoffmann bromamide reaction	(ii) Anti Saytzeff
(c) Cabylamine reaction	(iii) Hinsberg reagent
(d) Hoffmann orientation	(iv) Known reaction of Isocyanates

Choose the correct answer from the options given below:

51.

\(20\,\text{mL}\) of \(0.02\,\text{M}\) \(\mathrm{K_2Cr_2O_7}\) solution is used for the titration of \(10\,\text{mL}\) of \(\mathrm{Fe^{2+}}\) solution in the acidic medium. The molarity of \(\mathrm{Fe^{2+}}\) solution is \(\_\_\_\_\_\_\) \(\times10^{-2}\,\text{M}\). (Nearest Integer).

52.

\(2\mathrm{NO}+2\mathrm{H_2}\rightarrow \mathrm{N_2}+2\mathrm{H_2O}\)
The above reaction has been studied at \(800^{\circ}\mathrm{C}\). The related data are given in the table below:

The order of the reaction with respect to \(\mathrm{NO}\) is \(\_\_\_\_\_\_\).

53.

Amongst the following, the number of oxide(s) which are paramagnetic in nature is: \(\mathrm{Na_2O},\ \mathrm{KO_2},\ \mathrm{NO_2},\ \mathrm{N_2O},\ \mathrm{ClO_2},\ \mathrm{NO},\ \mathrm{SO_2},\ \mathrm{Cl_2O}\)

54.

The molar heat capacity for an ideal gas at constant pressure is \(20.785\,\mathrm{J\,K^{-1}\,mol^{-1}}\). The change in internal energy is \(5000\,\mathrm{J}\) upon heating it from \(300\,\mathrm{K}\) to \(500\,\mathrm{K}\). The number of moles of the gas at constant volume is \(\_\_\_\_\_\_\). [Nearest Integer] (Given \(R=8.314\,\mathrm{J\,K^{-1}\,mol^{-1}}\))

55.

According to MO theory, number of species/ions from the following having identical bond order is _____. \( \mathrm{CN^-}, \mathrm{NO^+}, \mathrm{O_2}, \mathrm{O_2^+}, \mathrm{O_2^{2+}} \)

56.

At \( 310 \, \text{K} \), the solubility of \( \mathrm{CaF_2} \) in water is \( 2.34 \times 10^{-3} \, \text{g}/100 \, \text{mL} \). The solubility product of \( \mathrm{CaF_2} \) is _____ \( \times 10^{-8} \, (\text{mol}/\text{L})^3 \). (Give molar mass : \( \mathrm{CaF_2} = 78 \, \text{g mol}^{-1} \) )

57.

The conductivity of a solution of complex with formula \( \mathrm{CoCl_3(NH_3)_4} \) corresponds to \( 1:1 \) electrolyte, then the primary valency of central metal ion is _______.

58.

In the titration of \( \mathrm{KMnO_4} \) and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is ______.

59.

Optical activity of an enantiomeric mixture is \( +12.6^\circ \) and the specific rotation of \( (+) \) isomer is \( +30^\circ \). The optical purity is _______ \( \% \).

60.

In the following reaction,

The \( \% \) yield for reaction \( \mathrm{I} \) is \( 60\% \) and that of reaction \( \mathrm{II} \) is \( 50\% \). The overall yield of the complete reaction is ______ \( \% \) [Nearest Integer]

JEE Main 2022 27th July Morning Shift

Physics Chemistry Mathematics

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