Chemistry

Why is half-life of a first-order reaction independent of concentration of the reactant?

The rate of a reaction decreased by 3.555 times when the temperature was changed from 40°C to 30°C. The activation energy (in kJmol⁻¹ ) of the reaction is _____.

The atomic number of Unnilunium is _____.

A solution of phenol in chloroform when treated with aqueous NaOH gives compound P as a major product. The mass percentage of carbon in P is (to the nearest integer) _____. (Atomic mass: C = 12; H = 1; O = 16 )

For Freudlich adsorption isotherm, a plot of log(x/m) ( y-axis) and log p (x-axis) gives a straight line. The intercept and slope for the line is 0.4771 and 2, respectively. The mass of gas adsorbed per gram of adsorbent if the initial pressure is 0.04 atm, is _____ * 10? g. (log 3 = 0.4771)

If the solubility product of AB₂ is 3.20 * 10⁻¹¹ M³, then the solubility of AB₂ in pure water is _____ * 10⁻⁴ mol L⁻¹. [Assuming that neither kind of ion reacts with water]

The correct match between Item-I and Item-II is:

Mischmetal is an alloy consisting mainly of:

The increasing order of the boiling points of the major products A, B and C of the following reactions will be:

Reaction of an inorganic sulphite X with dilute H₂SO₄ generates compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z. Y and Z respectively, are: