Class 12th

The shortest distance between the lines $\frac{x-3}{3}=\frac{y-8}{-1}=\frac{z-3}{1}$ $\frac{}{}\frac{}{}\frac{}{}$ and $\frac{x+3}{-3}=\frac{y+7}{2}=\frac{z-6}{4}$ $\frac{}{}\frac{}{}\frac{}{}$ is:

The volume, in mL, of 0.02M K₂Cr₂O₇ solution required to react with 0.288 g of ferrous oxalate in acidic medium is (Molar mass of Fe = 56 mol⁻¹)

Considering that ∆₀ > P, the magnetic moment (in BM) of [Ru(H₂O)₆]²⁺ would be

The number of chiral carbons present in sucrose is

Consider the complex ions, trans-[Co(en)?Cl?]? (A) and cis-[Co(en)?Cl?]? (B). The correct statement regarding them is:

Reaction of ammonia with excess Cl₂ gives:

Which one of the following polymers is not obtained by condensation polymerisation?

Boron and silicon of very high purity can be obtained through:

The rate constant (k) of a reaction is measured at different temperatures (T), and the data are plotted in the given figure. The activation energy of the reaction in kJ mol?¹ is: 

${\mathrm{l}\mathrm{i}\mathrm{m}}_{x\to 0}?{\left(\frac{3x^2+2}{7x^2+2}\right)}^{1/x^2}$ is equal to