Which of the following statements is correct for the spontaneous adsorption of a gas?

A \(\Delta S\) is negative and, therefore \(\Delta H\) should be highly positive.
B \(\Delta S\) is negative and therefore, \(\Delta H\) should be highly negative.
C \(\Delta S\) is positive and therefore, \(\Delta H\) should be negative.
D \(\Delta S\) is positive and therefore, \(\Delta H\) should also be highly positive.

Verified Solution

Answer & Solution

Correct Answer

(B) \(\Delta S\) is negative and therefore, \(\Delta H\) should be highly negative.

Step-by-step Solution

Detailed explanation

\(\Delta S\;[\text { change in entropy] and } \Delta H\;[\text { change in enthalpy }]\) are related by the equation \(\Delta G=\Delta H - T \Delta S\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match the metal ions given in Column\(- I\) with the spin magnetic moments of the ions given in Column\(-II\) and assign the correct code

Column\(-I\)	Column\(-II\)
\((a)\;Co^{+3}\)	\((i)\;\sqrt{8}\; B.M.\)
\((b)\;Cr^{+3}\)	\((ii)\;\sqrt{35}\; B.M.\)
\((c)\;Fe^{+3}\)	\((iii)\;\sqrt{3}\; B.M.\)
\((d)\;Ni^{+2}\)	\((iv)\;\sqrt{24}\; B.M.\)
	\((v)\;\sqrt{15}\; B.M.\)

\((a)\quad (b)\quad (c)\quad (d)\)

NEET 2018 Medium

The half-life for a zero order reaction having \(0.02 \;M\) initial concentration of reactant is \(100 \;s\). The rate constant (in \(mol \left.L^{-1} s^{-1}\right)\) for the reaction is

NEET 2020 Medium

Match List\(-l\) with List\(-ll\) :

List\(-I\) (Oxoacids of Sulphur)	List\(-II\) (Bonds)
\(A\). Peroxodisulphuric acid	\(I\). Two \(S - OH\), Four \(S = O\), One \(S - O - S\)
\(B\). Sulphuric acid	\(II\). Two \(S - OH\), One \(S = O\)
\(C\). Pyrosulphuric acid	\(III\). Two \(S - OH\), Four \(S = O\), One \(S - O - O - S\)
\(D\). Sulphurous acid	\(IV\). Two \(S - OH\), Two \(S = O\)

Choose the correct answer from the options given below.

NEET 2023 Medium

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