class 12

Missing

JEE Main

In the context of the Hall - Heroult process for the extraction of Al, which of the following statements is false ?

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A solution of (-) –1 - chloro - 1 - phenylethane is toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of :

If $[a×bb×cc×a]=λ[abc]_{2}$, then l is equal to

If $y=sec(tan_{−1}x)$, then $dxdy $at $x=1$is equal to

The real number k for which the equation, $2x_{3}+3x+k=0$has two distinct real roots in [0, 1]

Let O be the vertex and Q be any point on the parabola,$x_{2}=8y$. It the point P divides the line segment OQ internally in the ratio 1 : 3, then the locus of P is :

A long cylindrical shell carries positive surface charge $σ$ in the upper half and negative surface charge $−σ$ in the lower half. The electric field lines around the cylinder will look like figure given in : (figure are schematic and not drawn to scale)

Higher order $(>3)$ reactions are rare due to :

Which of the following complex species is not expected to exhibit optical isomerism?