Chemistry

Given are two statements one is labeled as Assertion A and other is labeled as Reason R.

Assertion A : Magnesium can reduce Al₂O₃ at a temperature below 1350°C, while above 1350°C aluminium can reduce MgO

Reason R : The melting and boiling points of magnesium are lower thatn those of aluminium.

In light of the above statements, choose most appropriate answer for the options given below

Element “E” belongs to the period 4 and group 16of the periodic table. The valence shell electron configuration of the element, which is just above “E” in the group is

The Zeta potential is related to which property of colloids

The incorrect statement about the imperfections in solids is

 ${\left[Fe{\left(CN\right)}_6\right]}^{3-}$ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (-) _________ ${\Delta }_0.$ (Nearest integer)

In bromination of Propyne, with Bromine 1, 1, 2, 2-tetrabromopropane is obtained in 27% yield. The amount of 1, 1, 2, 2- tetrabromopropane obtained from 1g of Bromine in this reaction is_______________* 10^-1g. (Nearest integer) (Molar mass: Bromine = 80g / mol)

In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids) (number of peptide bonds) is_______________.

The reaction between X and Y is first order respect to X and zero order with respect to Y.

Examine the data of table and calculate ratio of numerical values of M and L (Nearest integer)

If the solubility product of PbS is 8 * 10^-28, then the solubility of PbS in pure water at 298 K is $x*10^{-16}mol{L}^{-1}.$  The value of x is__________. (Nearest integer)

[Given: $\sqrt[]{2}=1.41]$  

If O₂ gas is bubbled  through water at 303 K, the number of millimoles of O₂ gas that dissolve in 1 litre of water is______________. (Nearest integer)

(Given: Henry's Law constant for O₂ at 303 K is 46.82 k bar and partial pressure of O₂ = 0.920 bar)

(Assume solubility of O₂ in water in too small, nearly negligible)