Chemistry Test ...

The solubility of \(\mathrm{Cd} \mathrm{SO}_4\) in water is \(8.0 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\). Its solubility in \(0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4\) solution is ........ \(\times 10^{-6} \mathrm{~mol} \mathrm{~L}^{-1}\). (Round off to the nearest integer) (Assume that, solubility is much less than \(0.01 \mathrm{M}\) )

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.

Electrons in a cathode ray tube have been emitted with a velocity of \(1000 \mathrm{~ms}^{-1}\). The number of following statements which is/are true about the emitted radiation is -__-___.

Given: \(\mathrm{h}=6 \times 10^{-34} \mathrm{Js}, \mathrm{m}_{\mathrm{e}}=9 \times 10^{-31} \mathrm{~kg}\).

(A) The deBroglie wavelength of the electron emitted is \(666.67 \mathrm{~nm}\).

(B) The characteristic of electrons emitted depend upon the material of the electrodes of the cathode ray tube.

(c) The cathode rays start from cathode and move towards anode.

(D) The nature of the emitted electrons depends on the nature of the gas present in cathode ray tube.

A compound processes 8% sulphur by mass.The least molecular mass is:

When the excited electron of a H atom from n=5 drops to the ground state, the maximum number of emission lines observed are______

Hybridization of \(\mathrm{Fe}\) in \(\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is:

The wavelength range of the visible spectrum extends from violet \((400 \mathrm{~nm}\) ) to red ( \(750 \mathrm{~nm}\) ). Express these wavelengths in frequencies (Hz). (1nm \(\left.=10^{-9} \mathrm{~m}\right)\)

What strategy of drug design is frequently used on complex lead compounds derived from natural products?

If the amino group of glycine and carboxylic acid group of alanine undergo elimination of water molecule, the name of the compound thus formed is: