Chemistry Test ...

XeF₆ on partial hydrolysis with water, produces a compound X. The same compound X is formed when XeF₆ reacts with silica. The compound X is:

How many EDTA (ethylenediaminetetraacetate) unit(s) are required to make an octahedral complex with a Ca²⁺ ion?

Electrometallurgical process is used to extract

For one mole of a Van der Waals gas, when b = 0 and T = 300 K, the PV vs. 1/V plot is shown below. The value of the Van der Waals constant a (atm litre² mol^-2) is:

Cr²⁺ and Mn³⁺ both have d⁴ configuration. Thus

Three elements X, Y, and Z have atomic numbers 19, 37, and 55 respectively. Then the correct statements(s) is/are

An electron in an atom jumps in such a way that its kinetic energy changes from x to x/9. The change in its potential energy (magnitude) will be-

The amount (in grams) of sucrose (mol wt. = 342 g) that should be dissolved in 100 g water in order to produce a solution with a 105.0 ^oC difference between the freezing point and boiling point is

(Given that K_f = 1.86 K kg mol⁻¹ and Kb = 0.51 K kg mol⁻¹ for water)

The rate of decomposition for methyl nitrite and ethyl nitrite can be given in terms of rate constant k₁ and k₂ respectively. The energy of activation for the two reactions are 152.30 kJ mol⁻¹ and 157.7 kJ mol⁻¹ as well as frequency factors are 10¹³ and 10¹⁴ respectively for the decomposition of methyl and ethyl nitrite. Calculate the temperature at which rate constant will be the same for the two reactions.

Choose from the indicated protons, the one that is most acidic.