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

A solution of CUSO₄ is electrolyzed using a current of 1.5 amperes for 10 minutes. What mass of Cu is deposited at cathode? (At. Mass of Cu- 63.7)

Half-life of first order reaction is 20 minutes. What is the time taken to reduce the initial concentration of the reactant to `1/10`th?

What is the unit of rate constant for the zero order reaction?

Half-life of first-order reaction \[\ce{X -> Y + Z}\] is 3 minutes. What is the time required to reduce the concentration of 'X' by 90 % of it's initial concentration?

Which is the unit of rate constant for the first-order reaction if time is expressed in seconds?

Rate constant for zero order reaction is 2 × 10^-2 mol L^-1 s^-1. If the concentration of the reactant after 25 sec. is 0.5 M, what is the initial concentration of reactant?

For zero order reaction, when [A]_t is plotted against time (t), the slope of the straight line obtained is equal to ______.

What is the SI unit of density?

The dissociation constant of two acids HA₁ and HA₂ are 3.14 × 10⁻⁴ and 1.96 × 10⁻⁵ respectively. The relative strength of the acids will be approximately ______.

In the above reaction product 'P' is:

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?

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 ______.

A solution of acetone in ethanol ______.

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