The correct statement amongst the following is : - Vidyadip

MCQ

The correct statement amongst the following is :

A
The term 'standard state' implies that the temperature is $0^{\circ} \mathrm{C}$
B
The standard state of pure gas is the pure gas at a pressure of 1 bar and temperature 273 K
C
$\Delta_{f} \mathrm{H}_{298}^{\theta}$ is zero for $\mathrm{O}(\mathrm{g})$
D
$\Delta_{\mathrm{f}} \mathrm{H}_{500}^{\theta}$ is zero for $\mathrm{O}_{2}(\mathrm{~g})$

✓

Answer

D. $\Delta_{\mathrm{f}} \mathrm{H}_{500}^{\theta}$ is zero for $\mathrm{O}_{2}(\mathrm{~g})$
For standard state $\Rightarrow$ pressure $=1$ bar and temperature is specified only
$\Rightarrow\left(\Delta \mathrm{H}_{\mathrm{f}}^{\mathrm{o}}\right)_{\mathrm{O}_{2,(\mathrm{~g})}}=0$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "SECTION - A [CHEMISTY - MCQ]" from JEE Main 7-April-2025 Paper - Shift 2→JEE Main 7-April-2025 Paper - Shift 2 — all question types→JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

If $E_{A{u^ + }/Au}^o$ is $1.69\, volt$ and $E_{A{u^{ + 3}}/Au}^o$ is $1.40\, volt$ then $E_{A{u^ + }/A{u^{ + 3}}}^o$ will be ........... $\mathrm{V}$

The conductivity of a solution of complex with formula $CoCl _{3}\left( NH _{3}\right)_{4}$ corresponds to $1: 1$ electrolyte, then the primary valency of central metal ion is

In the following reaction sequence, the amount of $D$ (in $g$ ) formed from $10$ moles of acetophenone is. . . . . . (Atomic weights in $g mol ^{-1}: H =1, C =12, N =14, O =16, Br =80$. The yield (%) corresponding to the product in each step is given in the parenthesis)

Which one of the nitrogen of histidine is firstly protonated ?

Ethyl bromide reacts with silver nitrite to form

$x$ and $y$ respectively are

Which of the following set of quantum numbers belong to highest energy

Given below are two statements:

Statement $I$ : The metallic radius of $\mathrm{Na}$ is $1.86 \mathrm{~A}^{\circ}$ and the ionic radius of $\mathrm{Na}^{+}$is lesser than $1.86 \mathrm{~A}^{\circ}$.

Statement $II$ : Ions are always smaller in size than the corresponding elements.

In the light of the above statements, choose the correct answer from the options given below :

According to $MO$ theory, number of species/ions from the following having identical bond order is $.........$

$CN ^{-}, NO ^{+}, O _{2}, O _{2}^{+}, O _{2}^{2+}$

Which of the following species has the highest ionisation potential