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Physics
Two uniformally charged large plane sheets S₁ and S₂ having charge densities are placed at a distance d parallel to each other. A charge q₀ is moved along a line of length a (a<d) at an angle 45⁰ with the normal to S₁. Calculate the work done by the electric field.
Chemistry
Identify the reagent from the following list which can easily distinguish between 1-butyne and 2-butyne (a) bromine, CCl₄ (b) H₂ Lindlar catalyst (c) dilute H₂SO₄, HgSO₄ (d) ammonical Cu₂Cl₂ solution
Mathematics
In an equilateral triangle the in-radius and the circum-radius are connected by (a) r = 4R (b) r = R/2 (c) r = R/3 (d) None

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