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The correct option for free expansion of an ideal gas under adiabatic condition is
Which of the following species has a bond angle of 120$$^\circ$$?
Intramolecular hydrogen bonding is present in:
The correct order of electronegativity of hybrid orbitals of carbon is:
Which one of the following statements is incorrect related to Molecular Orbital Theory?
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :
The enthalpy and entropy change for the reaction: $\text{Br}_2 (l) + \text{Cl}_2 (g) \rightarrow 2\text{BrCl} (g)$ are $30 \text{ kJ mol}^{-1}$ and $105 \text{ J K}^{-1}\text{ mol}^{-1}$ respectively. The temperature at which the reaction will be in equilibrium is :
Ozone is prepared by passing silent electric discharge through oxygen. In this reaction [AFMC 1998]:
Which of the following is true for an adiabatic process?
In which of the following reactions, the standard reaction entropy change ($\Delta S^{\circ}$) is positive, and standard Gibb's energy change ($\Delta G^{\circ}$) decreases sharply with increasing temperature?
Given the following reaction: $4\text{H(g)} \rightarrow 2\text{H}_2\text{(g)}$. The enthalpy change for the reaction is $-869.6 \text{ kJ}$. The dissociation energy of the H-H bond is:
The values of $\Delta H$ and $\Delta S$ for the given reaction are $170 \text{ kJ}$ and $170 \text{ J K}^{-1}$, respectively. $\text{C(graphite)} + \text{CO}_2\text{(g)} \rightarrow 2\text{CO(g)}$ This reaction will be spontaneous at:
The standard free energies of formation (in $\text{kJ/mol}$) at $298 \text{ K}$ are $-237.2$, $-394.4$, and $-8.2$ for $\text{H}_2\text{O(l)}$, $\text{CO}_2\text{(g)}$, and pentane (g), respectively. The value of $E^\circ_{\text{cell}}$ for the pentane-oxygen fuel cell is:
Which of the following are not state functions? (I) $q + W$ (II) $q$ (III) $W$ (IV) $H - TS$
Under isothermal condition, a gas at $300 \text{ K}$ expands from $0.1 \text{ L}$ to $0.25 \text{ L}$ against a constant external pressure of $2 \text{ bar}$. The work done by the gas is:
Assuming each reaction is carried out in an open container, the reaction that shows $\Delta H = \Delta E$ is:
From Kirchhoff's equation which factor affects the heat of reaction [MP PMT 1990]
An engine operating between 150°C and 25°C takes 500 J heat from a higher temperature reservoir. If there are no frictional losses, then the work done by the engine is [MH CET 1999]:
An ideal gas expands in volume from $1 \times 10^{-3}$ m$^{3}$ to $1 \times 10^{-2}$ m$^{3}$ at 300 K against a constant pressure of $1 \times 10^{5}$ N m$^{-2}$. The work done is [AIEEE 2004]:
The absolute enthalpy of neutralisation of the reaction $MgO(s) + 2HCl(aq) ightarrow MgCl_{2}(aq) + H_{2}O(l)$ will be [CBSE PMT 2005]: