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

How much charge in coulombs is required for the reduction of one mole of Al³⁺ to Al?

Consider the following half-cell reaction:

\[\ce{Au^{3+} + 3e^- -> Au_{(s)}}\]

How many coulombs of electricity is required to deposits 0.394 g of Au.

(Given - Molar mass of Au = 197 g mol⁻¹)

Identify the correct decreasing of relative tendency of metals to undergo oxidation from following.

What is the time required to deposit one millimole of aluminium by passage of 9.65 ampere through aqueous solution of aluminium ions?

The time required to deposit one millimole of monovalent metal by the passage of 9.65 amperes through aqueous solution of metal ion is ____________.

During electrolysis of aqueous NaCl, the product obtained at cathode is ____________.

The half-life of a first order reaction is 6.0 hour. How long will it take for the concentration of reactant to decrease from 0.4 M to 0.12 M?

Which among the following is an example of zero order reaction?

For a first order reaction, \[\ce{A -> B}\], if [A] = 1 M and rate is 4 × 10⁻² M s⁻¹. What is the rate constant of the reaction?

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

A first order reaction takes 40 minutes for 30% decomposition. What is the half-life of reaction?

In a reaction \[\ce{N2_{(g)} + 3H2_{(g)} -> 2NH3_{(g)}}\], if the rate of disappearance of N_2(g) is 2.6 × 10⁻⁴ M/s, the rate of disappearance of H_2(g) in M/s is ____________.

A first order reaction takes 40 minutes for 30% completion. Calculate the half-life of reaction.

0.0210 M solution of N₂O₅ is allowed to decompose at 43°C. How long will it take to reduce to 0.0150 M?
(Given k = 6.0 × 10⁻⁴ sec⁻¹)

A first order reaction is 50% completed in 16 minutes. The percentage of reactant that will react in 32 minutes is ____________.

The time required to decompose SO₂Cl₂ to half of it's initial amount is 60 minutes. Calculate rate constant for this first order reaction.

A metallic element has a cubic lattice with edge length of unit cell 2 Å. Calculate the number of unit cells in 200 g of the metal, if density of metal is 2.5 g cm^-3?

Which of the following formulae is used to find edge length of bee unit cell?

Which among the following is a correct formula of Bariumtetrachlorocuprate (ll)?

When 2 moles of an ideal gas are expanded isothermally from a volume of 12.5 L to 15.0 L against constant external pressure of 7 60 mm Hg. Calculate the amount of work done in joule?