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

Calculate the enthalpy of hydrogenation of C₂H_4(g), given that the enthalpy of formation of ethane and ethylene are −30.2 kcal and +12.5 kcal respectively.

When ethyl methyl ether is treated with cold concentrated HI, it gives two products. Products formed are ____________.

Combustion of glucose takes place as

\[\ce{C6H12O6_{(s)} + 6O2_{(g)} -> 6CO2_{(g)} + 6H2O_{(g)}}\]; ΔH = −72 kcal mol⁻¹

The energy needed for the production of 1.8 g of glucose by photosynthesis will be ___________.

The enthalpy of formation of nitrogen dioxide is +33.2 kJ mol⁻¹. The enthalpy of the reaction \[\ce{2N2_{(g)} + 4O2_{(g)} -> 4NO2_{(g)}}\]; is ____________.

The radius of the third Bohr orbit for hydrogen atom is ____________.

What will be the volume of oxygen gas produced, if the reaction \[\ce{2KClO_{3(s)} -> 2KCl_{(s)} + 3O_{2(g)}}\]; ΔH° = - 78 kJ is carried out at S.T.P.?

How many moles of methane are present in 11.2 Lat S.T.P.?

In resonance hybrid of ozone molecule, O-O bond length is ____________.

Which among the following oxides is amphoteric in nature?

What is the colour of gaseous ozone?

Van't Hoff factor for K₃[Fe(CN)₆] is 3.333. What is it's percentage dissociation in water?

Why is observed molar mass of acetic acid in benzene is greater than actual molar mass?

Standard enthalpy of formation of water is - 286 kJ mol^-1. When 1800 mg of water is formed from its constituent elements in their standard states the amount of energy liberated is ______.

Given that,

\[\ce{C_{(s)} + O_{2(g)} -> CO_{2(g)}}\]   ΔH° = -X kJ

\[\ce{2CO_{(g)} + O_{2(g)} -> 2CO_{2(g)}}\]   ΔH° = - Y kJ, then standard enthalpy of formation of carbon monoxide is ________.

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 gas among the following contains a maximum number of molecules at STP?

(Molar masses in g mol^-1 : CO₂ = 44, Ar = 39.9, CH₄ = 16, O₂ = 32)

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