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For a first order reactiont=2.303klogaa-xHere initial concentration, a = 10 g and concentration left after time t sec = 2.5 g i.e., 2.5 g i.e., (a –
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Given, Horizontal range is equal to 4 times the maximum height attained by the projectile. Therefore, So, angle of projection is 45°.
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(a) Osmosis: The process of flow of solvent molecules from pure solvent to a solution or from a solution of lower concentration to a solution of higher concen
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∵ ∆ABC is an equilateral triangle∴AC = BC = AB⇒ BC = AB⇒ BC = 2aIn right triangle COB,OB2 + OC2 = BC2  a2 + OC2 = (2a)2  OC2 + 3a2  Similarly
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Find CBSE, ICSE State Boards Textbook Solutions of Class 8 to 12 of all subjects. Read NCERT Textbooks Questions and Answers & Find Previous year solved papers.
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Evelyn performs at music concerts. In a very hectic schedule, she manages to give solo performances. Apart from that, she  performs free  at prison and hospi
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A tournament where a team once defeated automatically gets eliminated from the tournament and only the winning team continues. The defeated team is not given a
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For Charley, Grand Central Station of New York has three levels. Actually, there are only two levels. There does not exist any third level. The modern world is
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The highest military generals of the South African defence force and police saluted Mandela and pledged their loyalty. Their attitude towards blacks had ta
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Given, EMF, E1 = 1.5 V ; E2 = 2 V Internal resistance, r = 0.2 Effective emf of two cells connected in parallel is, Eeff =   This implies, The effective
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Number of Arsenic atoms per m3 =5 x 1022 Number of Indium atoms per m3 = 5 × 1020Intrinsic concentration, ni = 1.5 x 1016&nbs
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For FCC lattice (assuming cation in octahedral void and anion in FCC)a = 508 pm (r+ + r-) = a/2 = 508/2 = 254 pm(r+ + r-) = 254 pmr- = 254-110 = 144 pm
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For the absorption of visible light, the presence of unpaired d- electrons is the necessity.a) In [Ni(CN)4]2- , Ni is present as Ni2+Ni2+ = [Ar] 3d8 4s0Therefo
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