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Chemistry

Compound \( A \) contains \( 8.7\% \) Hydrogen, \( 74\% \) Carbon and \( 17.3\% \) Nitrogen. The molecular formula of the compound is,
Given: Atomic masses of \( \mathrm{C}, \mathrm{H} \) and \( \mathrm{N} \) are \( 12, 1 \) and \( 14 \) amu respectively.
The molar mass of the compound \( A \) is \( 162 \, \text{g mol}^{-1} \).

Consider the following statements:
(a) The principal quantum number ' \( n \) ' is a positive integer with values of ' \( n \) ' \( = 1, 2, 3, \ldots \).
(b) The azimuthal quantum number ' \( l \) ' for a given ' \( n \) ' (principal quantum number) can have values as ' \( l \) ' \( = 0, 1, 2, \ldots \, n \).
(c) Magnetic orbital quantum number ' \( m_l \) ' for a particular ' \( l \) ' (azimuthal quantum number) has \( (2l + 1) \) values
.(d) \( \pm 1/2 \) are the two possible orientations of electron spin.
(e) For \( l = 5 \), there will be a total of \( 9 \) orbital
Which of the above statements are correct?

In the structure of \( \mathrm{SF}_4 \), the lone pair of electrons on \( \mathrm{S} \) is in.

A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4.

The ratio of $\frac{[\text{CH}_3\text{CH}_2\text{COO}^-]}{[\text{CH}_3\text{CH}_2\text{COOH}]}$ required to make buffer is___________.

Given : $\text{K}_\text{a} (\text{CH}_3\text{CH}_2\text{COOH}) = 1.3 \times 10^{-5}$

Match List –I with List II

Choose the coorrect answer fform the options given below :

Match List –I with List – II

In the metallurgical extraction of copper, following reaction is used:
\( \mathrm{FeO} + \mathrm{SiO_2} \rightarrow \mathrm{FeSiO_3} \)
\( \mathrm{FeO} \) and \( \mathrm{FeSiO_3} \) respectively are.

Hydrogen has three isotopes: protium (\( {}^{1}\mathrm{H} \)), deuterium (\( {}^{2}\mathrm{H} \)) or \( \mathrm{D} \) and tritium (\( {}^{3}\mathrm{H} \) or \( \mathrm{T} \)). They have nearly same chemical properties but different physical properties. They differ in

Among the following basic oxide is:

Among the given oxides of nitrogen; \( \mathrm{N_2O} \), \( \mathrm{N_2O_3} \), \( \mathrm{N_2O_4} \) and \( \mathrm{N_2O_5} \), the number of compound/(s) having \( \mathrm{N-N} \) bond is:

Which of the following oxoacids of sulphur contains "S" in two different oxidation states?

Correct statement about photo-chemical smog is:

The correct IUPAC name of the following compound is:

The major product \( (P) \) of the given reaction is
(where, Me is \( -\mathrm{CH_3} \) )

Isobutyraldehyde on reaction with formaldehyde and \( \mathrm{K_2CO_3} \) gives compound 'A'. Compound 'A' reacts with \( \mathrm{KCN} \) and yields compound 'B', which on hydrolysis gives a stable compound 'C'. The compound 'C' is

With respect to the following reaction, consider the given statements:

(a) o-Nitroaniline and p-nitroaniline are the predominant products
(b) p-Nitroaniline and m-nitroaniline are the predominant products
(c) \( \mathrm{HNO_3} \) acts as an acid
(d) \( \mathrm{H_2SO_4} \) acts as an acid

Given below are two statements, one is Assertion (A) and other is Reason (R).
Assertion (A) : Natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties.
Reason (R) : The cis-polyisoprene molecules consist of various chains held together by strong polar interactions with coiled structure.
In the light of the above statements, choose the correct one form the options given below:

When sugar \( X \) is boiled with dilute \( \mathrm{H_2SO_4} \) in alcoholic solution, two isomers \( A \) and \( B \) are formed. \( A \) on oxidation with \( \mathrm{HNO_3} \) yields saccharic acid where as \( B \) is laevorotatory. The compound \( X \) is:

The drug Tegamet is:

\( 100 \, \text{g} \) of an ideal gas is kept in a cylinder of \( 416 \, \text{L} \) volume at \( 27^\circ \mathrm{C} \) under \( 1.5 \, \text{bar} \) pressure. The molar mass of the gas is ________ \( \text{g mol}^{-1} \). (Nearest integer)
(Given : \( R = 0.083 \, \text{L bar K}^{-1} \, \text{mol}^{-1} \) )

For combustion of one mole of magnesium in an open container at $300\text{ K}$ and $1\text{ bar}$ pressure, $\Delta_{\text{C}}\text{H}^{\ominus} = -601.70\text{ kJ mol}^{-1}$, the magnitude of change in internal energy for the reaction is __________ $\text{kJ}$.

(Nearest integer)

(Given : $\text{R} = 8.3\text{ J K}^{-1}\text{ mol}^{-1}$)

\( 2.5 \, \text{g} \) of protein containing only glycine \( \left( \mathrm{C_2H_5NO_2} \right) \) is dissolved in water to make \( 500 \, \text{mL} \) of solution. The osmotic pressure of this solution at \( 300 \, \mathrm{K} \) is found to be \( 5.03 \times 10^{-3} \, \text{bar} \). The total number of glycine units present in the protein is _______________.
(Given : \( R = 0.083 \, \text{L bar K}^{-1} \, \text{mol}^{-1} \) )

For the given reactions
\( \mathrm{Sn^{2+}} + 2e^- \rightarrow \mathrm{Sn} \)
\( \mathrm{Sn^{4+}} + 4e^- \rightarrow \mathrm{Sn} \)
the electrode potentials are; \( E^{0}_{\mathrm{Sn^{2+}/Sn}} = -0.140 \, \text{V} \) and \( E^{0}_{\mathrm{Sn^{4+}/Sn}} = 0.010 \, \text{V} \). The magnitude of standard electrode potential for \( \mathrm{Sn^{4+}/Sn^{2+}} \) i.e. \( E^{0}_{\mathrm{Sn^{4+}/Sn^{2+}}} \) is __________ \( \times 10^{-2} \, \text{V} \).
(Nearest integer)

A radioactive element has a half life of \( 200 \) days. The percentage of original activity remaining after \( 83 \) days is __________. (Nearest integer)
(Given : antilog \( 0.125 = 1.333 \), antilog \( 0.693 = 4.93 \) )

\( [\mathrm{Fe(CN)_6}]^{4-} \)
\( [\mathrm{Fe(CN)_6}]^{3-} \)
\( [\mathrm{Ti(CN)_6}]^{3-} \)
\( [\mathrm{Ni(CN)_4}]^{2-} \)
\( [\mathrm{Co(CN)_6}]^{3-} \)
Among the given complexes, number of paramagnetic complexes is __________.

\( (a) \\ \mathrm{CoCl_3 \cdot 4 \\ NH_3} \)
\( (b) \\ \mathrm{CoCl_3 \cdot 5NH_3} \)
\( (C) \\ \mathrm{CoCl_3 \cdot 6NH_3} \) and
\( (d) \\ \mathrm{CoCl(NO_3)_2 \cdot 5NH_3} \)
Number of complex(es) which will exist in cis-trans form is/are __________.

The complete combustion of \( 0.492 \, \text{g} \) of an organic compound containing \( \text{‘C’, ‘H’ and ‘O’} \) gives \( 0.793 \, \text{g} \) of \( \mathrm{CO_2} \) and \( 0.442 \, \text{g} \) of \( \mathrm{H_2O} \). The percentage of oxygen composition in the organic compound is ______ (nearest integer)

The major product of the following reaction contains __________ bromine atoms(s).

\(0.01\,\text{M}\) KMnO\(_4\) solution was added to \(20.0\,\text{mL}\) of \(0.05\,\text{M}\) Mohr's salt solution through a burette. The initial reading of \(50\,\text{mL}\) burette is zero. The volume of KMnO\(_4\) solution left in the burette after the end point is ______ \( \text{mL} \). (nearest integer)

JEE Main 2022 28th June Evening Shift

Physics Chemistry Mathematics

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In the metallurgical extraction of copper, following reaction is used:
\( \mathrm{FeO} + \mathrm{SiO_2} \rightarrow \mathrm{FeSiO_3} \)
\( \mathrm{FeO} \) and \( \mathrm{FeSiO_3} \) respectively are.