class 11

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JEE Main

A mixture containing the following four compounds is extracted with 1 M HCl. The compound that goes to aqueous layer is :

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The area (in sq. units) of the quadrilateral formed by the tangents at the end points of the latera recta to the ellipse $9x_{2} +5y_{2} =1$, is:

Let C be the circle with centre at (1, 1) and radius = 1. If T is the circle centred at (0, y), passing through origin and touching the circle C externally, then the radius of T is equal to

The angle between the lines whose direction cosines satisfy the equations $l+m+n=0$and $l_{2}=m_{2}+n_{2}$is

In the reaction : the product E is

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

A complex number z is said to be unimodular if . Suppose $z_{1}$and $z_{2}$are complex numbers such that $2−z_{1}z_{2}z_{1}−2z_{2} $is unimodular and $z_{2}$is not unimodular. Then the point $z_{1}$lies on a :

In which of the following reactions $H_{2}O_{2}$ acts as a reducing agent ?

A compound with molecular mass 180 is acylated with $CH_{3}COCl$ to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is: