The pyknometric density of sodium chloride crystal is 2.165x10^3 kg$m^{-3}$ while its X-ray density is 2.178x$10^3 kgm^{-3}$ ?. The fraction of unoccupied sites in sodium chloride crystal is
|
The pH of 0.1 M solution of the following salts increases in the order |
Answer |
|
Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy ? |
Answer |
|
A substance A,B, crystallises in a face centred cubic (fcc) lattice in which atoms A occupy each corner of the cube and atoms B occupy the centres of each face of the cube. Identify the correct composition of the substance $A_xB_y$ |
Answer |
|
Which of the following is a sink for CO? |
Answer |
|
Number of lone pair(s) in $XeOF_4$ is/are |
Answer |
|
Which of the following compounds will exhibit geometrical isomerism ? |
Answer |
|
The longest wavelength of Het in Paschen series in “m”, then shortest wavelength of $Be^{+3}$ in Paschen series is (in terms of m): |
Answer |
|
Which one of the following orders represents the correct sequence of increasing basic nature of the given oxides? |
Answer |
|
The most suitable method of separation of 1 : 1 mixture of ortho-and para-nitrophenols is |
Answer |
|
In which of the following pairs of molecules/ions both the species are not likely to exist? |
Answer |