class 12

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JEE Main

Which of the following atoms has the highest first ionization energy?

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The coagulating power of electrolytes having ions $Na_{+},Al_{3+}andBa_{2+}$ for arsenic sulphide sol increases in the order:

If the vectors $AB=3i^+4k^$ and $AC=5i^−2j^ +4k^$are the sides of a triangle ABC, then the length of the median through A is

Match List-I (Electromagnetic wave type) with List-II (Its association/application) and select the correct option from the choice given below the lists :

The sum of first 20 terms of the sequence 0.7, 0.77, 0.777, .. , is

The x-coordinate of the incentre of the triangle that has the coordinates of mid points of its sides as (0, 1), (1, 1) and (1, 0) is

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.

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)

The negation of $s∨(r∧s)$ is equivalent to :