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

The volume of oxygen required for complete combustion of 0.25 mole of methane at STP is ______.

Which of the following molecule does not contain oxygen?

When 6.0 g of graphite reacts with dihydrogen to give methane gas, 37.4 kJ of heat is liberated. What is standard enthalpy of formation of CH₄ (g)?

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 used.

It a centimolal aqueous solution of K₃[Fe(CN)₆] has degree of dissociation 0.78. What is the value of van't Hoff factor?

The heat of formations of CO_(g) and CO_2(g) are −26.4 kcal and −94.0 kcal respectively. The heat of combustion of carbon monoxide will be ____________.

The standard heats of formation for CCl_4(g), H₂O_(g), CO_2(g), and HCl_(g) are −25.5, −57.8, −94.1 and −22.1 kcal mol⁻¹, respectively.

∆H for the reaction

\[\ce{CCl4_{(g)} + 2H2O_{(g)} -> CO2_{(g)} + 4HCl_{(g)}}\] at 298 K

Calculate van't Hoff-factor for 0.2 m aqueous solution of KCl which freezes at - 0.680°C. (K_f = 1.86 K kg mol^-1).

What is the energy in joules released when an electron moves from n = 2 to n = 1 level in a hydrogen atom?

Which among the following oxides of nitrogen is called nitrogen sesquioxide?

If the van't Hoff-factor for 0.1 M Ba(NO₃)₂ solution is 2.74, the degree of dissociation is ______.

If K_sp of a sparingly soluble salt M₂X at 25°C is 1.0 × 10⁻¹¹, the solubility of the salt in mole litre⁻¹ at this temperature will be ____________.

Daily requirement of energy of a person is 'x' kJ. If heat of combustion of food material (Molecular mass = 100 g) is 'y' kJ, his daily consumption of the food in gram would be ____________.

The volume in dm³ occupied by 15.0 g of ethane at STP is ____________.

The standard heats of formation in kcal mol⁻¹ of NO_2(g) and N₂O_4(g) are 8.0 and 2.0 respectively. The heat of dimerization of NO₂ in kcal is ____________.

\[\ce{2NO2_{(g)} ⇌ N2O4_{(g)}}\]

The enthalpy change accompanying a reaction in which 1 mole of the substance in the standard state reacts completely with oxygen or is completely burnt is called as ____________.

The spectral line obtained when an electron jumps from n = 5 to n = 2 level in hydrogen atom belongs to the ____________ series.

The volume of 1 mole of any pure gas at standard temperature and pressure is always equal to ______.

Which of the following is also called as nitrogen sesquioxide?

Which of the following acts as oxidising agent in a hydrogen-oxygen fuel cell?