Chemistry Test ...

The increasing order of basicity of the following compounds is:

In the presence of a catalyst, the heat evolved or absorbed during the reaction _______.

A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the solvent in resulting solution.

A high molecular weight compound formed by combining large numbers of small molecules of low molecular weight is called:

The tendency of a reaction to take place spontaneously is greatest when the reaction is:

Transition metal compounds are usually coloured. This is due to the electronic transition:

Plastic used to preserve yogurts is replaced with a polymer called polylactic acid is an example of ____________.

The pH of a 10 ml aqueous solution of HCl is 4. The amount of water to be added to this solution in order to change its pH from 4 to 5 is:

Two different first order reactions have rate constants \(\mathrm{k}_{1}\) and \(\mathrm{k}_{2}\) at \(\mathrm{T}_{1}\left(\mathrm{k}_{1}>\mathrm{k}_{2}\right)\). If temperature is increased from \(\mathrm{T}_{1}\) to \(\mathrm{T}_{2}\), then new constants become \(\mathrm{k}_{3}\) and \(\mathrm{k}_{4}\) respectively. Which among the following relations is correct?

In a hexagonal closed packing lattice, coordination number of an atom in a unit cell is: