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Which of the following is the wrong statement?

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A uniform cylinder of length L and mass M having cross-sectional area A is suspended, with its length vertical, from a fixed point by a massless spring, such that it is half submerged in a liquid of density $σ$ at equilibrium position. The extension $x_{0}$ of the spring when it is in equilibrium is:

If the number of terms in the expansion of $(1−x2 +x_{2}4 )_{n},x=0,$is 28, then the sum of the coefficients of all the terms in this expansion, is :

The intermolecular interaction that is dependent on the inverse cube of distance between the molecule 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

Which one has the highest boiling point ?

The set of all values of $λ$for which the system of linear equations : $2x_{1}−2x_{2}+x_{3}=λx_{1}$$2x_{1}−3x_{2}+2x_{3}=λx_{2}$$−x_{1}+2x_{2}=λx_{3}$has a non-trivial solution,

The number of points, having both co-ordinates as integers, that lie in the interior of the triangle with vertices (0, 0), (0, 41) and (41, 0), is :

The forward biased conection is :