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

Choose the correct option.

Ethers are kept in air tight brown bottles because ______________.

Select the INCORRECT statement.

The CORRECT relationship between molar solubility (S) and solubility product (K_sp) for salt, Cr(OH)₃ is ____________.

The dissociation constant of a weak base (BOH) is 1.8 × 10⁻⁵. Its degree of dissociation in 0.001 M solution is ____________.

At T (K), the molar ionic conductivities of NH; and OH⁻ at infinite dilution are 72 and 198 S cm² mol⁻¹ respectively. The molar conductivity of 0.01 M NH₄OH solution at the same temperature is found to be 9 S cm² mol⁻¹. The percentage dissociation of NH₄OH at this concentration is ____________.

Identify the INCORRECT match.

When 2 moles of C₂H_6(g) are completely burnt, 3129 kJ of heat is liberated. If ∆H_f for CO_2(g) and H₂O_(l) are −395 and −286 kJ per mole respectively, the heat combustion of C₂H_6(g) is ____________.

Which is the CORRECT representation for the solubility product (K_sp) of CaF₂?

A compound that has a high negative heat of formation is normally ____________.

According to Bohr's theory, an electron can move only in those orbits for which its angular momentum is integral multiple of ____________.

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)?

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 ____________.

Concentration of the \[\ce{C2O^-_{4(aq)}}\] ions in a saturated solution of Ag₂C₂O₄ is 1.1 × 10⁻⁴ mol L⁻¹. Solubility product of Ag₂C₂O₄ is __________.

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?