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Chemistry

Identify the correct order for the given property for following compounds.

The reaction representing the Mond process for metal refining is ________.

For \( 1 \) mol of gas, the plot of \( pV \) vs. \( p \) is shown below. \( p \) is the pressure and \( V \) is the volume of the gas

What is the value of compressibility factor at point A?

Match List I with List II.

Choose the correct answer from the options given below:

Compound that will give positive Lassaigne’s test for both nitrogen and halogen is:

During the borax bead test with \( \mathrm{CuSO_4} \), a blue green colour of the bead was observed in oxidising flame due to the formation of:

“A” obtained by Ostwald’s method involving air oxidation of \( \mathrm{NH_3} \), upon further air oxidation produces “B”. “B” on hydration forms an oxoacid of Nitrogen along with evolution of “A”. The oxoacid also produces “A” and gives positive brown ring test. Identify A and B, respectively.

The standard electrode potential \( (\mathrm{M^{3+}} / \mathrm{M^{2+}}) \) for \( \mathrm{V} \), \( \mathrm{Cr} \), \( \mathrm{Mn} \) and \( \mathrm{Co} \) are \( -0.26 \ \mathrm{V} \), \( -0.41 \ \mathrm{V} \), \( +1.57 \ \mathrm{V} \) and \( +1.97 \ \mathrm{V} \), respectively. The metal ions which can liberate \( \mathrm{H_2} \) from a dilute acid are;

The magnetic behavior of \( \mathrm{Li_2O} \), \( \mathrm{Na_2O_2} \) and \( \mathrm{KO_2} \), respectively, are:

Chiral complex from the following is: Here en \( = \) ethylene diamine

The major product ‘P’ for the following sequence of reactions is:

Which of the following salt solutions would coagulate the colloid solution formed when \( \mathrm{FeCl_3} \) is added to \( \mathrm{NaOH} \) solution, at the fastest rate?

The shortest wavelength of hydrogen atom in Lyman series is \( \lambda \). The longest wavelength in Balmer series of \( \mathrm{He}^+ \) is:

The correct order of hydration enthalpies is

\( (A) \ \mathrm{K}^+ \) \( (B) \ \mathrm{Rb}^+ \) \( (C) \ \mathrm{Mg}^{2+} \) \( (D) \ \mathrm{Cs}^+ \) \( (E) \ \mathrm{Ca}^{2+} \)

The bond dissociation energy is highest for:

Number of cyclic tripeptides formed with \( 2 \) amino acids \( A \) and \( B \) is:

Which of the given compounds can enhance the efficiency of hydrogen storage tank?

The increasing order of \( pK_a \) for the following phenols is:
\( (A) \) \( 2, 4 \) - Dinitrophenol \( (B) \) \( 4 \) - Nitrophenol \( (C) \) \( 2, 4, 5 \) – Trimethylphenol \( (D) \) Phenol \( (E) \) \( 3 \)-Chlorophenol
Choose the correct answer from the options given below:

Match List I with List II.

Choose the correct answer from the options given below:

Correct statement about smog is:

Solid Lead nitrate is dissolved in \( 1 \) litre of water. The solution was found to boil at \( 100.15^\circ \mathrm{C} \). When \( 0.2 \) mol of \( \mathrm{NaCl} \) is added to the resulting solution, it was observed that the solution froze at \( -0.8^\circ \mathrm{C} \). the solubility product of \( \mathrm{PbCl_2} \) formed is __________ \( \times 10^{-6} \) at \( 298 \, \mathrm{K} \). (Nearest integer)

Given : \( K_b = 0.5 \, \mathrm{K \, kg \, mol^{-1}} \) and \( K_f = 1.8 \, \mathrm{K \, kg \, mol^{-1}} \). Assume molality to be equal to molarity in all cases.

Consider the following reaction approaching equilibrium at \( 27^\circ \mathrm{C} \) and \( 1 \) atm pressure

The standard Gibb’s energy change \( (\Delta_r G^\theta) \) at \( 27^\circ \mathrm{C} \) is (–) ________ \( \mathrm{kJ\, mol^{-1}} \)

(Nearest integer) (Given: \( R = 8.3 \, \mathrm{J \, K^{-1} \, mol^{-1}} \) and \( \ln 10 = 2.3 \))

Following figure shows dependence of molar conductance of two electrolytes on concentration. \( \Lambda_m^\circ \) is the limiting molar conductivity.

The number of incorrect statement(s) from the following is ______
(A) \( \Lambda_m^\circ \) for electrolyte A is obtained by extrapolation
(B) For electrolyte B, \( \Lambda_m \) vs \( \sqrt{c} \) graph is a straight line with intercept equal to \( \Lambda_m^\circ \)
(C) At infinite dilution, the value of degree of dissociation approaches zero for electrolyte B.
(D) \( \Lambda_m^\circ \) for any electrolyte A or B can be calculated using \( \lambda^\circ \) for individual ions

For certain chemical reaction \( X \rightarrow Y \), the rate of formation of product is plotted against the time as shown in the figure. The number of correct statement/s from the following is ______ .

(A) Over all order of this reaction is one
(B) Order of this reaction can’t be determined
(C) In region I and III, the reaction is of first and zero order respectively
(D) In region-II, the reaction is of first order
(E) In region-II, the order of reaction is in the range of \( 0.1 \) to \( 0.9 \).

Following chromatogram was developed by adsorption of compound ‘A’ on a \( 6 \, \text{cm} \) TLC glass plate. Retardation factor of the compound ‘A’ is ______ \( \times 10^{-1} \).

The sum of bridging carbonyls in \( \mathrm{W(CO)_6} \) and \( \mathrm{Mn_2(CO)_{10}} \) is ________.

\( 17 \, \text{mg} \) of a hydrocarbon (M.F. \( \mathrm{C_{10}H_{16}} \)) takes up \( 8.40 \, \text{mL} \) of the \( \mathrm{H_2} \) gas measured at \( 0^\circ \text{C} \) and \( 760 \, \text{mm Hg} \). Ozonolysis of the same hydrocarbon yields

The number of double bond/s present in the hydrocarbon is _______.

The number of molecules or ions from the following, which do not have odd number of electrons are ________.
(A) \( \mathrm{NO_2} \) (B) \( \mathrm{ICl_4^-} \) (C) \( \mathrm{BrF_3} \)
(D) \( \mathrm{ClO_2} \) (E) \( \mathrm{NO_2^+} \) (F) \( \mathrm{NO} \)

Water decomposes at \( 2300 \, \text{K} \) \( \mathrm{H_2O(g)} \rightarrow \mathrm{H_2(g)} + \tfrac{1}{2}\mathrm{O_2(g)} \). The percent of water decomposing at \( 2300 \, \text{K} \) and \( 1 \, \text{bar} \) is ________ (Nearest integer). Equilibrium constant for the reaction is \( 2 \times 10^{-3} \) at \( 2300 \, \text{K} \).

Millimoles of calcium hydroxide required to produce \( 100 \, \text{mL} \) of the aqueous solution of \( \text{pH} \, 12 \) is \( x \times 10^{-1} \). The value of \( x \) is _______ (Nearest integer).
Assume complete dissociation.

JEE Main 2023 29th Jan Morning Shift

Physics Chemistry Mathematics

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The correct order of hydration enthalpies is

\( (A) \ \mathrm{K}^+ \) \( (B) \ \mathrm{Rb}^+ \) \( (C) \ \mathrm{Mg}^{2+} \) \( (D) \ \mathrm{Cs}^+ \) \( (E) \ \mathrm{Ca}^{2+} \)