class 11

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JEE Main

Which one of the following reagents is not suitable for the elimination reaction ?

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Let $α$and $β$be the roots of equation $x_{2}−6x−2=0$. If $a_{n}=α_{n}−β_{n},forn≥1$, then the value of $2a_{9}a_{10}−2a_{8} $is equal to:

Let $T_{n}$be the number of all possible triangles formed by joining vertices of an n-sided regular polygon. If $T_{n+1}−T_{n}=10$, then the value of n is

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

A particle of mass m moving in the x direction with speed 2v is hit by another particle of mass 2m moving in the y direction with speed v. If the collision is perfectly inelastic, the percentage loss in the energy during the collision is close to

A uniformly charged solid sphere of radius R has potential $V_{0}$ (measured with respect to $∞$ ) on its surface. For this sphere the equipotential surface with potentials $23V_{0} ,45V_{0} ,43V_{0} and4V_{0} $ have radius \displaystyle{R}_{}

The variance of first 50 even natural numbers is

Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest $E_{M_{3+}/M_{2+}}$ value ?

The intercepts on x-axis made by tangents to the curve, $y=∫_{0}∣t∣dt,x∈R,$which are parallel to the line $y=2x$, are equal to