HSC Science (Computer Science) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Chemistry

Identify whether the following pair have a larger entropy or not. If yes then Why?

O₂{g) at 1 atm or O₂(g) at 10 atm both at the same temperature.

Identify whether the following pair have a larger entropy or not. If yes then Why?

C₂H₅OH(l) or C₂H₅OH(g)

Write modification of expressions of colligative properties with the help of van't Hoff factor.

Write the relationship between Gibbs energy change for a process and total entropy change of system and surroundings.

Calculate the van't Hoff factor assuming the complete dissociation of NaBr in its aqueous solution.

What is a spontaneous process? What are its characteristics?

Calculate ΔT_b and boiling point of 0.05 m aqueous solution of glucose. (Given: K_b = 0.52 K m⁻¹).

Write the mathematical equation between reaction rate constant and its activation energy.

Calculate ΔG for ΔH = − 110 kJ, ΔS = + 40 J K⁻¹ at 400 K.

The value of van't Hoff factor will be minimum for ______.

ΔH for the reaction is − 110 kJ, and ΔS is + 40 JK⁻¹ at 400 K. The free energy change for the reaction is ______.

Explain with the help of Arrhenius equation, how does the rate of reaction changes with temperature.

Explain with the help of Arrhenius equation, how does the rate of reaction changes with activation energy.

For a certain reaction ΔH⁰ is −224 kJ and ΔS⁰ is −153 J K⁻¹. At what temperature the change over from spontaneous to non-spontaneous will occur?

Calculate ΔG⁰ for the reaction

\[\ce{CH_{4(g)} + H_{2(g)}-> C2H_{6(g)}}\]

State whether the reaction is spontaneous or not. (Given: K_P = 3.358 × 10¹⁷, T = 25° C, R = 8.314 × 10⁻³ kJK⁻¹ moI⁻¹)

Find out the value of equilibrium constant for the following reaction at 298 K, \[\ce{2NH3_{(g)} + CO2_{(g)} ⇌ NH2 - COONH2_{(aq)} + H2O_{(l)}}\] Gibbs Standard energy change 298 K = –13.6 kJ mol⁻¹.

Define second law of thermodynamics.

Explain with the help of Arrhenius equation, how does the rate of reaction changes with temperature.

Explain with the help of Arrhenius equation, how does the rate of reaction changes with activation energy.

Write the balanced chemical equations when acidified \[\ce{K2Cr2O7}\] reacts with \[\ce{H2S}\].