Chemistry Test ...

If two Cl^– ion are removed from any corners of a perfect CsCl crystal (Cs⁺ at cubic void), then its packing fraction will become :

An alloy of metal 'A', 'B' and 'C' is found to have 'A' constituting ccp lattice. If 'B' atom occupy the edge centres and 'C' is present at the body centre, the formula of the alloy is :-

The rate constant for two parallel reactions were found to be 1.0 × 10^–2 s^–1 and 3.0 × 10^–2 s^–1. If the corresponding energies of activation of the parallel reactions are 60.0 kJ mol^–1 and 70.0 kJ mol^–1 respectively, what is the apparent overall energy of activation ?

For the first order reaction, A → product (t_1/2 = 10 minutes), the fraction of reactant degraded after an hour from the reaction has started is :

Which of the following has maximum boiling point ?

Which of the following statements is not correct ?

Given reaction A₂ + B₂ → 2AB follows the mechanism as given below :

which is/are correct statements -

Select the correct statement.

In an experiment vapours of compound (X) are placed between pair of metal plates in the absence of applied field in figure(I) and in the presence of applied electrical field when an electrical potential is applied across the plates in figure-2. Depends on compound(X) identify correct statement(s).

Which of the following chemical specie(s) does/do not exist.