JEE MAIN 2023 ONLINE 11TH APRIL EVENING SHIFT

Given below are two statements :

Statement I : In the metallurgy process, sulphide ore is converted to oxide before reduction.

Statement II : Oxide ores in general are easier to reduce.

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

In satellite communication, the uplink frequency band used is :

If four distinct points with position vectors \(\vec{a}, \vec{b}, \vec{c}\) and \(\vec{d}\) are coplanar, then \([\vec{a} \,\,\vec{b} \,\,\vec{c}]\) is equal to :

One mole of \(\mathrm{P}_{4}\) reacts with 8 moles of \(\mathrm{SOCl}_{2}\) to give 4 moles of \(\mathrm{A}, x\) mole of \(\mathrm{SO}_{2}\) and 2 moles of \(\mathrm{B} . \mathrm{A}, \mathrm{B}\) and \(x\) respectively are :

A car P travelling at \(20 \mathrm{~ms}^{-1}\) sounds its horn at a frequency of \(400 \mathrm{~Hz}\). Another car \(\mathrm{Q}\) is travelling behind the first car in the same direction with a velocity \(40 \mathrm{~ms}^{-1}\). The frequency heard by the passenger of the car \(\mathrm{Q}\) is approximately [Take, velocity of sound \(=360 \mathrm{~ms}^{-1}\) ]

Let the line passing through the points \(\mathrm{P}(2,-1,2)\) and \(\mathrm{Q}(5,3,4)\) meet the plane \(x-y+z=4\) at the point \(\mathrm{R}\). Then the distance of the point \(\mathrm{R}\) from the plane \(x+2 y+3 z+2=0\) measured parallel to the line \(\frac{x-7}{2}=\frac{y+3}{2}=\frac{z-2}{1}\) is equal to :