Chemistry Test ...

Titration of I₂ produced from 0.1045 g of primary standard KIO₃ required 30.72 mL of sodium thiosulphate as shown below :

The molarity of sodium thiosulphate ion is :

The standard reduction potentials of Cu²⁺ / Cu and Cu²⁺ / Cu⁺ are 0.337 V and 0.153 V respectively. The standard electrode potential of Cu⁺ / Cu half cell is

The electron energy in hydrogen atom is given by  Calculate the energy required to remove an electron completely from the n = 2 orbit. What is the longest wavelength (in cm) of light that can be used to cause this transition?

An element has fcc structure with edge length 200 pm, calculate the density if 200g of this element contains 24 × 10²³ atoms. (N_A ⁼  6 × 10²³​)

A compound that gives a positive iodoform test is

1.44 g of Titanium (Ti) reacted with an excess of O₂ and produced x gm of a non-stoichiometric compound Ti_1.44O₁. The value of x is :

A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

One desires to prepare a positively charged solution of silver iodide. This can be achieved by

Anhydrous AlCl₃. How will it behave in Aqueous solution?

The ionisation energy of solid NaCl is 180 kcal per mol.The dissolution of the solid in water in the form of ions is endothermic to the extent of 1 kcal per mol. If the solvation energies of Na⁺ and Cl^- ions are in the ratio 6 : 5, what is the enthalpy of hydration of sodium ion ?