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NEET 2025
Exam
NEET
Year
2025
Subject
Chemistry
Chapter
Thermodynamics (C)

NEET 2025 · Chemistry · Thermodynamics (C)

C(~s)+2 H_2(~g) arrow CH_4(~g) ; Δ H=-74.8 ~kJ ~mol^ -1 Which of...

C( s)+2H2( g)→CH4( g);ΔH=−74.8 kJ mol−1\mathrm{C}(\mathrm{~s})+2 \mathrm{H}_2(\mathrm{~g}) \rightarrow \mathrm{CH}_4(\mathrm{~g}) ; \Delta \mathrm{H}=-74.8 \mathrm{~kJ} \mathrm{~mol}^{-1} Which of the following diagrams gives an accurate representation of the above reaction? [R→[\mathrm{R} \rightarrow reactants; P→\mathrm{P} \rightarrow products ]]C(~s)+2 H_2(~g) arrow CH_4(~g) ; Δ H=-74.8 ~kJ ~mol^ -1 Which of the following diagrams gives an accurateC(~s)+2 H_2(~g) arrow CH_4(~g) ; Δ H=-74.8 ~kJ ~mol^ -1 Which of the following diagrams gives an accurateC(~s)+2 H_2(~g) arrow CH_4(~g) ; Δ H=-74.8 ~kJ ~mol^ -1 Which of the following diagrams gives an accurateC(~s)+2 H_2(~g) arrow CH_4(~g) ; Δ H=-74.8 ~kJ ~mol^ -1 Which of the following diagrams gives an accurateC(~s)+2 H_2(~g) arrow CH_4(~g) ; Δ H=-74.8 ~kJ ~mol^ -1 Which of the following diagrams gives an accurate

Options

  1. AThe mass of iron converted into Fe_3O_4 by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1 ,
  2. BThe mass of iron converted into Fe_3O_4 by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1 ,
  3. CThe mass of iron converted into Fe_3O_4 by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1 ,
  4. DThe mass of iron converted into Fe_3O_4 by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1 ,

Correct answer

A. The mass of iron converted into Fe_3O_4 by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1 ,

Step-by-step solution

For Exothermic reaction ⇒ΔH=Hp−HR=−ve∴HR>Hp\begin{aligned} & \Rightarrow \Delta H=H_p-H_R=-v e \\ & \therefore H_R\gt H_p \end{aligned} C(~s)+2 H_2(~g) arrow CH_4(~g) ; Δ H=-74.8 ~kJ ~mol^ -1 Which of the following diagrams gives an accurate
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