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Chemistry

The incorrect statement is:

The major product formed in the following reaction is:

The correct options for the products A and B of the following reactions are:

Given below are two statements:
Statement I : According to Bohr’s model of an atom, qualitatively the magnitude of velocity of electron increases with decrease in positive charges on the nucleus as there is no strong hold on the electron by the nucleus.
Statement II : According to Bohr’s model of an atom, qualitatively the magnitude of velocity of electron increases with decrease in principal quantum number.
In the light of the above statements, chose the most appropriate answer from the options given below:

Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?

What are the products formed in sequence when excess of \( \mathrm{CO_2} \) is passed in slaked lime?

Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?

Excess of isobutane on reaction with \( \mathrm{Br_2} \) in presence of light at \( 125^\circ\mathrm{C} \) gives which one of the following, as the major product?

The major products formed in the following reaction sequence A and B are:

Given below are two statements:
Statement I : Frenkel defects are vacancy as well as interstitial defects.
Statement II : Frenkel defect leads to colour in ionic solids due to presence of F-centres.
Choose the most appropriate answer for the statements from the options given below:

Which one of the following complexes is violet in colour?

Which one of the following methods is most suitable for preparing deionized water?

The major product formed in the following reaction is:

The conversion of hydroxyapatite occurs due to presence of \( \mathrm{F^-} \) ions in water. The correct formula of hydroxyapatite is:

Among the following compounds I–IV, which one forms a yellow precipitate on reacting sequentially with \( \mathrm{(i)\ NaOH} \) \( \mathrm{(ii)\ dil.\ HNO_3} \) \( \mathrm{(iii)\ AgNO_3} \)?

Given below are two statements:
Statement I : In the titration between strong acid and weak base methyl orange is suitable as an indicator.
Statement II : For titration of acetic acid with \( \mathrm{NaOH} \) phenolphthalein is not a suitable indicator.
In the light of the above statements, choose the most appropriate answer from the options given below:

The polymer formed on heating Novolac with formaldehyde is:

Given below are two statements:
Statement I : The limiting molar conductivity of \( \mathrm{KCl} \) (strong electrolyte) is higher compared to that of \( \mathrm{CH_3COOH} \) (weak electrolyte).
Statement II : Molar conductivity decreases with decrease in concentration of electrolyte.
In the light of the above statements, choose the most appropriate answer from the options given below:

The correct sequential addition of reagents in the preparation of \( 3 \)-nitrobenzoic acid from benzene is:

Given below are two statements.
Statement I: The choice of reducing agents for metals extraction can be made by using Ellingham diagram, a plot of \( \Delta G \) vs temperature.
Statement II: The value of \( \Delta S \) increases from left to right in Ellingham diagram.
In the light of the above statements, choose the most appropriate answer from the options given below:

Of the following four aqueous solutions, total number of those solutions whose freezing point is lower than that of \( 0.10 \, \mathrm{M} \) \( \mathrm{C_2H_5OH} \) is ________. (Integer answer)
\( (i) \) \( 0.10 \, \mathrm{M} \) \( \mathrm{Ba_3(PO_4)_2} \) \( (ii) \) \( 0.10 \, \mathrm{M} \) \( \mathrm{Na_2SO_4} \) \( (iii) \) \( 0.10 \, \mathrm{M} \) \( \mathrm{KCl} \) \( (iv) \) \( 0.10 \, \mathrm{M} \) \( \mathrm{Li_3PO_4} \)

The total number of negative charge in the tetrapeptide, Gly–Glu–Asp–Tyr, at \( \mathrm{pH} \) \( 12.5 \) will be ________. (Integer answer)

The \( \mathrm{OH^-} \) concentration in a mixture of \( 5.0 \, \mathrm{mL} \) of \( 0.0504 \, \mathrm{M} \) \( \mathrm{NH_4Cl} \) and \( 2 \, \mathrm{mL} \) of \( 0.0210 \, \mathrm{M} \) \( \mathrm{NH_3} \) solution is \( x \times 10^{-6} \, \mathrm{M} \). The value of \( x \) is __________. (Nearest Integer)
[Given \( K_w = 1 \times 10^{-14} \) and \( K_b = 1.8 \times 10^{-5} \)]

The Born-Haber cycle for $\text{KCl}$ is evaluated with the following data:
$\Delta_f \text{H}^{\ominus}$ for $\text{KCl} = -436.7 \text{ kJ mol}^{-1}$; $\Delta_{\text{sub}} \text{H}^{\ominus}$ for $\text{K} = 89.2 \text{ kJ mol}^{-1}$;
$\Delta_{\text{ionization}} \text{H}^{\ominus}$ for $\text{K} = 419.0 \text{ kJ mol}^{-1}$; $\Delta_{\text{electron gain}} \text{H}^{\ominus}$ for $\text{Cl}_{(\text{g})} = -348.6 \text{ kJ mol}^{-1}$;
$\Delta_{\text{bond}} \text{H}^{\ominus}$ for $\text{Cl}_2 = 243.0 \text{ kJ mol}^{-1}$
The magnitude of lattice enthalpy of $\text{KCl}$ in $\text{kJ mol}^{-1}$ is ________. (Nearest integer)

The ratio of number of water molecules in Mohr's salt and potash alum is ______ \( \times 10^{-1} \). (Integer answer)

The number of \( 4f \) electrons in the ground state electronic configuration of \( \mathrm{Gd^{2+}} \) is ______.
[Atomic nuclear of Gd \( = 64 \)]

\( \mathrm{AB_3} \) is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is ______. (Integer answer)

These are physical properties of an element:
(A) Sublimation enthalpy
(B) Ionisation enthalpy
(C) Hydration enthalpy
(D) Electron gain enthalpy
The total number of above properties that affect the reduction potential is _______. (Integer answer)

An aqueous \( \mathrm{KCl} \) solution of density \( 1.20 \, \mathrm{g\, mL^{-1}} \) has a molality of \( 3.30 \, \mathrm{mol\, kg^{-1}} \). The molarity of the solution in \( \mathrm{mol\, L^{-1}} \) is ______. (Nearest integer)

The following data was obtained for chemical reaction given below at 975 K.

The order of the reaction with respect to \( \mathrm{NO} \) is __________. [Integer answer]

JEE Main 2021 26th August Morning Shift

Physics Chemistry Mathematics

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The following data was obtained for chemical reaction given below at 975 K.

The order of the reaction with respect to \( \mathrm{NO} \) is __________. [Integer answer]