JEE MAIN 2023 ONLINE 8TH APRIL MORNING SHIFT

A TV transmitting antenna is \(98 \mathrm{~m}\) high and the receiving antenna is at the ground level. If the radius of the earth is \(6400 \mathrm{~km}\), the surface area covered by the transmitting antenna is approximately:

Which of the following metals can be extracted through alkali leaching technique?

If the equation of the plane containing the line

\(x+2 y+3 z-4=0=2 x+y-z+5\) and perpendicular to the plane

$\vec{r}=(\hat{i}-\hat{j})+\lambda(\hat{i}+\hat{j}+\hat{k})+\mu(\hat{i}-2 \hat{j}+3 \hat{k})$

is $a x+b y+c z=4$, then \((a-b+c)\) is equal to :

The engine of a train moving with speed \(10 \mathrm{~ms}^{-1}\) towards a platform sounds a whistle at frequency \(400 \mathrm{~Hz}\). The frequency heard by a passenger inside the train is: (neglect air speed. Speed of sound in air \(=330 \mathrm{~ms}^{-1}\) )

Which of the following represent the Freundlich adsorption isotherms?

Choose the correct answer from the options given below:

If the coefficients of three consecutive terms in the expansion of \((1+x)^{n}\) are in the ratio \(1: 5: 20\), then the coefficient of the fourth term is