MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Chemistry

Which of the following equations is NOT correct for van't Hoff factor?

An ideal gas expands isothermally and reversibly from 10 m³ to 20 m³ at 300 K performing 5 .187 kJ of work on surrounding. Calculate number of moles of gas undergoing expansion. (R = 8.314 J K^-1 mol^-1)

Heat of formation of water is - 272 kJ mol^-1. What quantity of water is converted to H₂ and O₂ by 750 kJ of heat?

Standard entropies of N_2(g), H_2(g), and NH_3(g) are a₁, a₂ and a₃ J K^-1 mol^-1 respectively. What is value of ΔS° for formation of NH_3(g)?

Which of following 0.1 m aqueous solution exhibits highest osmotic pressure at 25°C?

Solution of 'A' containing 1.73 g of it in 100 cm³ of water is found to be isotonic with a 3.42% (w/v) solution of sucrose. The molecular weight of A is ______. (At. mass C = 12, H = 1, 0 = 16)

Van't Hoff factor (i) for centimolal solution of \[\ce{K3[Fe(CN)6]}\] is 3.333. What is its percentage dissociation?

Which of the following equations has Δ_fH° and ΔH° same?

Heat of formation of ethane, ethylene acetylene and carbon dioxide are - 136, - 66, - 228 and - 395 (all in kJ) respectively, most stable among them is ______.

Which of the following is not an assumption of the kinetic theory of gases?

From the following bond energies:

H – H bond energy: 431.37 kJ mol⁻¹

C = C bond energy: 606.10 kJ mol⁻¹

C – C bond energy: 336.49 kJ mol⁻¹

C – H bond energy: 410.50 kJ mol⁻¹

Enthalpy for the given reaction will be:

\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...................}\ce{H}\phantom{...}\ce{H}\phantom{....}\\
\phantom{.}|\phantom{....}|\phantom{....................}|\phantom{....}|\phantom{.....}\\
\ce{C = C + H - H -> H - C - C - H}\\
\phantom{.}|\phantom{....}|\phantom{....................}|\phantom{....}|\phantom{.....}\\
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...................}\ce{H}\phantom{...}\ce{H}\phantom{....}
\end{array}\]

Which of the following statements regarding fuel cell is incorrect?

Which one is amphoteric oxide?

The equation that represent general van't Hoff equation is ______.

An element having electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ forms ______.

High concentration of which of the following in the atmosphere leads to stiffness of flower buds which eventually fall off from plants?

Mark the oxide which is amphoteric in character.

Identify the invalid equation.

For which among the following equimolar aqueous solutions Van't Hoff factor has the lowest value?

\[\ce{A -> B}\], ∆H = −10 kJ mol⁻¹, E_a(f) = 50 kJ mol⁻¹, then E_a of \[\ce{B -> A}\] will be ______.