Class 12th

Allosteric inhibitors are a type of drug-enzyme inhibitor that binds to a site other than the active site of the enzyme, causing a conformational change that affects the active site. The statement in the document incorrectly states they bind at the active site due to steric factors.

A divalent metal ion with an atomic number (Z) of 25 is Mn²?
Mn²? (Z=25) has the electronic configuration: 3d? 4s? (n=5, five unpaired electrons).
The magnetic moment (μ) is calculated as: μ = √ [n (n+2)] = √ [5 (5+2)] = √35 = 5.92 BM.

Kindly consider the following figure

From ohm's Law, V = IR = I (ρl / A) = I (ρl / (πd²/4) ⇒ ρ = (πd²V) / (4lI)
Relative error in resistivity,
Δρ/ρ = 2 (Δd/d) + ΔV/V + Δl/l + ΔI/I = 2 * (0.01/5.00) + (0.1/5.0) + (0.1/10.0) + (0.01/2000) = 0.039
Percentage error = (Δρ/ρ) * 100 = 3.9%

Kindly consider the following figure

The circuit diagram represents an XOR Gate. The output Y is derived as:
Y = (A? B? ) (A + B) = (A? + B? ) (A + B) = A? B + AB? (XOR Gate)

Kindly consider the following figure

Solid sol is a colloidal system consisting of a gas dispersed in a solid, e.g., pumice stone, foam rubber.

Fringe width, β = (λD) / d = (5890 * 10? ¹? * 0.5) / (0.5 * 10? ³) = 589 * 10? m
Distance between first and third bright fringe = 2β = 1178 * 10? m.

This describes a nucleophilic aromatic substitution reaction. Aryl halides are very less reactive toward this reaction, so the reaction takes place at a high temperature, i.e., 623K, and high pressure of 300 atm.