The standard Gibbs energy change at 300 K for the reaction 2A⇔B+C is 2494.2J. At a given time, the composition of the reaction mixture is [A]=21,[B]=2and[C]=21. The reaction proceeds in the : [R=8.314J/K/mol,e=2.718]
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The period of oscillation of a simple pendulum is T=2πgL. Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using wrist watch of 1 s resolution. The accuracy in the determination of g is :
A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0∘C. As it does so, it absorbs 208J of heat. The values of q and w for the process will be: (R = 8.314 J/mol K) (l 7.5 = 2.01)
Let PS be the median of the triangle with vertices P(2,2),Q(6,−1)andR(7,3). The equation of the linepassing through (1,−1) and parallel to PS is
When 5V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is 2.5×10−4ms−1. If the electron density in the wire is 8×1028m−3, the resistivity of the material is close to :
If [a×bb×cc×a]=λ[abc]2, then l is equal to
The gas leaked from a storage tank of the Union Carbide plant in Bhopal gas tragedy was:
The synthesis of alkyl fluorides is best accomplished by :
Let [ϵ0] denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric current, then: