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

In ozone molecule the formal charge on the central oxygen atom is ______.

Osmotic pressure of a urea solution at 10°C is 500 mm Hg. Osmotic pressure of the solution become 105.3 mm Hg, when it is diluted and temperature is raised to 25°C. The extent of dilution is ____________.

0.6 g of a solute is dissolved in 0.1 L of a solvent which develops an osmotic pressure of 1.23 atm at 27°C. The molecular mass of the solute is ______.

Relationship between van't Hoff's factor (i) and degree of dissociation (α) is ______.

lf, \[\ce{C_{(s)} + O2_{(g)} -> CO2_{(g)}}\], ∆H = x .........(i)

\[\ce{CO_{(g)} + 1/2O2_{(g)} -> CO2_{(g)}}\], ∆H = y .......(ii)

Then, the heat of formation of CO is:

A particle has a mass of 0.002 kg and uncertainty in its velocity is 9.2 × 10⁻⁶ m/s, then uncertainty in position is ≥ ____________.

(h = 6.6 × 10⁻³⁴ J s)

\[\ce{S + 3/2O2 -> SO3 +2{x} kcal}\] .........(i)

\[\ce{SO2 + 1/2O2 -> SO3 + {y} kcal}\] .......(ii)

The heat of formation of SO₂ is ____________.

K_sp of a sparingly soluble salt AB is 1 × 10⁻⁸. When [A⁺] = 10⁻⁴ M, which of the following concentrations of B⁻ will NOT give precipitate of AB?

Find the CORRECT statement.

\[\ce{I2_{(g)} + H2S_{(g)} -> 2HI_{(g)} + S_{(s)}}\]

____________ is used as antifreeze agent in automobile radiators.

Which among the following salts, solubility decreases with increase in temperature?

Natalite is a mixture of ______.

Which of the following is responsible for the solubility of lithium compounds in organic solvents?

Calculate the total volume occupied by 48 g oxygen and 42 g nitrogen at STP.

Which of the following statements is INCORRECT?

The energy associated with the first orbit of He⁺ is ____________ J.

The osmotic pressure of a solution containing 10 g of cane sugar dissolved in 100 mL of water at 70°C is ____________.

Choose the INCORRECT statement about \[\ce{C2H5-O-C2H5}\] from the following.

The heat evolved in the combustion of benzene is given by

\[\ce{C6H6 + 7 1/2O2 -> 6CO2_{(g)} + 3H2O_{(l)}}\]; ΔH = −3264.6 kJ

Which of the following quantities of heat energy will be evolved when 39 g C₆H₆ are burnt?

Which of the following is/are CORRECT according to Bohr's atomic theory?

(I) Energy is emitted when electron moves from a higher stationary state to a lower one.

(II) Orbits are arranged concentrically around the nucleus in an increasing order of energy.

(III) The energy of an electron in the orbit changes with time.