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Chemistry

The incorrect statement about the imperfections in solids is:

The zeta potential is related to which property of colloids?

Element "E" belongs to the period \( 4 \) and group \( 16 \) of the periodic table. The valance shell electron configuration of the element, which is just above "E" in the group is:

Given are two statements one is labelled as Assertion A and other is labelled as Reason R.
Assertion A: Magnesium can reduce \( \mathrm{Al_{2}O_{3}} \) at a temperature below \( 1350^{\circ}\mathrm{C} \), while above \( 1350^{\circ}\mathrm{C} \) Aluminium can reduce \( \mathrm{MgO} \).
Reason R: The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements, choose most appropriate answer from the options given below:

Dihydrogen reacts with \( \mathrm{CuO} \) to give.

Nitrogen gas is obtained by thermal decomposition of:

Given below are two statements:
Statement-I: The pentavalent oxide of group-\( 15 \) element, \( \mathrm{E_2O_5} \), is less acidic than trivalent oxide, \( \mathrm{E_2O_3} \), of the same element.
Statement-II: The acidic character of trivalent oxide of group \( 15 \) elements, \( \mathrm{E_2O_3} \), decreases down the group.
In light of the above statements, choose most appropriate answer from the options given below:

Which one of the lanthanoids given below is the most stable in divalent form?

Given below are two statements:
Statement-I: \( \mathrm{[Ni(CN)_4]^{2-}} \) is square planar and diamagnetic complex, with \( \mathrm{dsp^2} \) hybridization for Ni but \( \mathrm{[Ni(CO)_4]} \) is tetrahedral, paramagnetic and with \( \mathrm{sp^3} \)-hybridization of Ni.
Statement-II: \( \mathrm{[NiCl_4]^{2-}} \) and \( \mathrm{[Ni(CO)_4]} \) both have same d-electron configuration, have same geometry and are paramagnetic.
In light of the above statements, choose the correct answer form the options given below:

Which amongst the following is not a pesticide?

Which one of the following techniques is not used to spot components of a mixture separated on thin layer chromatographic plate?

Which of the following structures are aromatic in nature?

The major product \( (P) \) in the reaction

The correct structure of product ‘\( A \)’ formed in the following reaction.

Which one of the following compounds is inactive towards \( \mathrm{S_{N}1} \) reaction?

Identify the major product formed in the following sequence of reactions:

A primary aliphatic amine on reaction with nitrous acid in cold \( 273 \, \mathrm{K} \) and there after raising temperature of reaction mixture to room temperature \( 298 \, \mathrm{K} \), gives a/an:

Which one of the following is NOT a copolymer?

Stability of \( \alpha \)-helix structure of proteins depends upon:

The formula of the purple colour formed in Lassaigne's test for sulphur using sodium nitroprusside is:

A \( 2.0 \, \text{g} \) sample containing \( \mathrm{MnO_2} \) is treated with \( \mathrm{HCl} \) liberating \( \mathrm{Cl_2} \). The \( \mathrm{Cl_2} \) gas is passed into a solution of \( \mathrm{KI} \) and \( 60.0 \, \text{mL} \) of \( 0.1 \, \text{M} \) \( \mathrm{Na_2S_2O_3} \) is required to titrate the liberated iodine. The percentage of \( \mathrm{MnO_2} \) in the sample is ______ (nearest integer) [Atomic masses (in \( \text{u} \)) \( \mathrm{Mn} = 55 \); \( \mathrm{Cl} = 35.5 \); \( \mathrm{O} = 16 \), \( \mathrm{I} = 127 \), \( \mathrm{Na} = 23 \), \( \mathrm{K} = 39 \), \( \mathrm{S} = 32 \)]

If the work function of a metal is \( 6.63 \times 10^{-19} \, \text{J} \), the maximum wavelength of the photon required to remove a photoelectron from the metal is ______ \( \text{nm} \). (nearest integer) [Given: \( h = 6.63 \times 10^{-34} \, \text{J s} \), and \( c = 3 \times 10^{8} \, \text{m s}^{-1} \)]

The hybridization of \( \mathrm{P} \) exhibited in \( \mathrm{PF_5} \) is \( \mathrm{sp^x d^y} \). The value of \( y \) is ______.

\( 4.0 \, \text{L} \) of an ideal gas is allowed to expand isothermally into vacuum until the total volume is \( 20 \, \text{L} \). The amount of heat absorbed in this expansion is ______ \( \text{L atm} \).

The vapour pressures of two volatile liquids \( A \) and \( B \) at \( 25^\circ \text{C} \) are \( 50 \, \text{Torr} \) and \( 100 \, \text{Torr} \), respectively. If the liquid mixture contains \( 0.3 \) mole fraction of \( A \), then the mole fraction of liquid \( B \) in the vapour phase is \( \frac{x}{17} \). The value of \( x \) is ______.

The solubility product of a sparingly soluble salt \( A_2X_3 \) is \( 1.1 \times 10^{-23} \). If specific conductance of the solution is \( 3 \times 10^{-5} \, \text{S m}^{-1} \), the limiting molar conductivity of the solution is \( x \times 10^{-3} \, \text{S m}^2 \text{ mol}^{-1} \). The value of \( x \) is ______.

The quantity of electricity in Faraday needed to reduce \( 1 \, \text{mole} \) of \( \text{Cr}_2\text{O}_7^{2-} \) to \( \text{Cr}^{3+} \) is ______.

For a first reaction \( A \rightarrow B \) , the rate constant, \( k = 5.5 \times 10^{-14} \, \text{s}^{-1} \). The time required for \( 67\% \) completion of reaction is \( x \times 10^{-1} \) times the half life of reaction. The value of \( x \) is ______ (nearest integer) (Given : \( \log 3 = 0.4771 \) )

Number of complexes which will exhibit synergic bonding amongst, \( [\mathrm{Cr}(\mathrm{CO})_6] \), \( [\mathrm{Mn}(\mathrm{CO})_5] \) and \( [\mathrm{Mn}_2(\mathrm{CO})_{10}] \) is ______.

In the estimation of bromine, \( 0.5 \, \text{g} \) of an organic compound gave \( 0.40 \, \text{g} \) of silver bromide. The percentage of bromine in the given compound is ________% (nearest integer) (Relative atomic masses of \( \mathrm{Ag} \) and \( \mathrm{Br} \) are \( 108 \, \text{u} \) and \( 80 \, \text{u} \), respectively).

JEE Main 2022 28th June Morning Shift

Physics Chemistry Mathematics

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The formula of the purple colour formed in Lassaigne's test for sulphur using sodium nitroprusside is: