For the reaction 2Cl(g) -> Cl2(g), the correct option is:

Correct answer: (B) _r H Cl2(g) forms a Cl–Cl bond. Bond formation releases energy, so the reaction is exothermic: _r H < 0. Two moles of gaseous atoms combine into one mole of gas molecules, so the number of gaseous particles decreases ( n_g = -1), giving _r S < 0.

NEET 2020 · ChemistryPrevious Year Question

For the reaction $2 Cl (g) Cl X_{2} (g)$ , the correct option is:

Answer: (B) $Δ_{r} H < 0$ and $Δ_{r} S < 0$ . \textbf{Answer:} (B) $Δ_{r} H < 0$ and $Δ_{r} S < 0$ \textbf{Solution:} The reaction $2 Cl (g) Cl X_{2} (g)$ forms a Cl–Cl bond.

A. $Δ_{r} H < 0$ and $Δ_{r} S > 0$
B. $Δ_{r} H < 0$ and $Δ_{r} S < 0$ ✓
C. $Δ_{r} H > 0$ and $Δ_{r} S > 0$
D. $Δ_{r} H > 0$ and $Δ_{r} S < 0$

Correct Answer

(B) $Δ_{r} H < 0$ and $Δ_{r} S < 0$

Solution & Explanation

\textbf{Answer:} (B) $Δ_{r} H < 0$ and $Δ_{r} S < 0$ \textbf{Solution:} The reaction $2 Cl (g) Cl X_{2} (g)$ forms a Cl–Cl bond. Bond formation releases energy, so the reaction is exothermic: $Δ_{r} H < 0$ . Two moles of gaseous atoms combine into one mole of gas molecules, so the number of gaseous particles decreases ( $Δ n_{g} = - 1$ ), giving $Δ_{r} S < 0$ .

🎯

43,000+ questions in हिंदी & English · one-tap toggle

Practice NEET 2020 Chemistry — free, with instant solutions

43,000+ NEET questions solved step-by-step, chapter-wise, in the MedicNEET app.

Open →📚Practice all NEET Chemistry PYQs chapter-wise →💡Don't get it? Learn the Thermodynamics concepts →

← Chemistry Q14 Chemistry Q16 →

More NEET PYQ solutions

ChemIdentify the suitable reagent for the following conversion: C6H5COOCH3 -> C6H5CHO (methyl benzoate to benzaldehyde)ChemThe correct order of decreasing acidity of the following aliphatic acids is ChemThe major product of the following reaction is: 4-oxo-4-phenylbutanenitrile C6H5-CO-CH2-CH2-CN is treated with (i) CH3MgBr (excess) and then (ii) H3O+.ChemOut of the following complex compounds, which compound will have the minimum conductance in solution?ChemWhich of the following are paramagnetic? A. [NiCl4]^2- B. Ni(CO)4 C. [Ni(CN)4]^2- D. [Ni(H2O)6]^2+ E. Ni(PPh3)4 ChemThe correct order of the wavelength of light absorbed by the following complexes is: A. [Co(NH3)6]^3+ B. [Co(CN)6]^3- C. [Cu(H2O)4]^2+ D. [Ti(H2O)6]^3+ChemThe correct order of decreasing basic strength of the given amines is: (N-ethylethanamine = (C2H5)2NH; ethanamine = C2H5NH2; N-methylaniline = C6H5NH(CH3); benzenamine/aniline = C6H5NH2)ChemPredict the major product P in the following sequence of reactions. The starting material is 1-methylcyclopent-1-ene: (i) HBr, benzoyl peroxide; (ii) KCN; (iii) Na(Hg)/C2H5OH P (major). The structures of the options (A)-(D) are shown in the image below:

More: All NEET 2020 Chemistry PYQs · NEET Chemistry PYQs · All NEET PYQs · Previous year papers

For the reaction 2Cl(g)​ClX2​(g), the correct option is:

Solution & Explanation

More NEET PYQ solutions

For the reaction $2 Cl (g) Cl X_{2} (g)$ , the correct option is: