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

A solution of copper sulphate (CuSO₄) is electrolyzed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at the cathode (at. mass of Cu = 63 u) is ______.

A metal has an fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm⁻³. The molar mass of the metal is ______.

(N_A Avogadro's constant = 6.02 × 10²³ mol⁻¹)

Which one of the following reactions is a true first-order reaction?

Consider the following reaction:

\[\ce{xMnO^-_4 + yC2O^{2-}_4 + zH^+ -> xMn^{2+} + 2{y}CO2 + z/2H2O}\]

The values of x, y, and z in the reaction are, respectively:

How many Faradays of electricity are required to deposit 10 g of calcium from molten calcium chloride using inert electrodes?
(Molar mass of calcium = 40 g mol^-1)

In face centred cubic unit cell, what is the volume occupied?

If the rate constant for a first-order reaction is k, the time (t) required for the completion of 99% of the reaction is given by:

5.0 g of sodium hydroxide (molar mass 40 g mol^-1) is dissolved in little quantity of water and the solution is diluted upto 100 mL. What is the molarity of the resulting solution?

The rate constant and half-life of a first order reaction are related to each other as ______.

\[\ce{H2O2 -> 2H^+ + O2 + 2e^-}\]; E⁰ = −0.68 V.

This equation represents which of the following behaviour of H₂O₂?

The greenhouse effect is because of the ______.

A solution of acetone in ethanol ______.

When Al is added to NaOH solution:

Which of the following reactions is not of the first order?

The unpaired electrons in Ni(CO)₄ are ______.

Calculate the work done during compression of 2 mol of an ideal gas from a volume of 1m³ to 10 dm³ 300K against a pressure of 100 KP a.

18 g of glucose (C₆H₁₂O₆) is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at l00°C is ______.

Which among the following reactions is an example of pseudo first order reaction?

The rate constant for a first order reaction is 7.0 × 10^-4 s^-1. If initial concentration of reactant is 0.080 M, what is the half-life of reaction?

What is the actual volume occupied by water molecules present in 20 cm³ of water?