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How many faradays are required to reduce \(1 \mathrm{~mol}\) of \(Cr_{2} O_{7}{ }^{2-}\) to \(\mathrm{Cr}^{3+}\) in acid medium
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Dec 14, 2021
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Some basic concepts in chemistry
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kritika
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Assuming the compounds to be completely dissociated in aqueous solution, identify the pair of the solutions that can be expected to be isotonic at the same temperature:
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Dec 14, 2021
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Some basic concepts in chemistry
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Which one of the following corresponds to a photon of highest energy?
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Dec 14, 2021
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Some basic concepts in chemistry
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You are supplied with \(500 \mathrm{ml}\) each of \(2 \mathrm{~N} \mathrm{HCl}\) and \(5 \mathrm{~N} \mathrm{HCl}\). What is the maximum volume of \(3 \mathrm{M} \mathrm{HCl}\) that you can prepare using only these two solutions?
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Some basic concepts in chemistry
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The compound that would produce a nauseating smell/odour with a hot mixture of chloroform and ethanolic potas sium hydroxide is
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Some basic concepts in chemistry
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ADP and ATP differ in the number of
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Some basic concepts in chemistry
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The isomerisation of 1-butyne to 2-butyne can be achieved by treatment with
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Dec 14, 2021
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Some basic concepts in chemistry
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When \(\mathrm{BaCl}_{2}\) is added to an aqueous salt solution, a white precipitate is obtained. The anion among \(\mathrm{CO}_{3}{ }^{2-}\), \mathrm{SO}_{3}{ }^{2-}\) and \(\mathrm{SO}_{4}{ }^{2-}\) that was present in the solution can be :
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Dec 14, 2021
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Some basic concepts in chemistry
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kritika
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3
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The correct basicity order of the following lanthanide ions is
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Dec 14, 2021
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Some basic concepts in chemistry
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\(\mathrm{PbCl}_{2}\) is insoluble in cold water. Addition of \(\mathrm{HCl}\) increases its solubility due to
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Dec 14, 2021
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Some basic concepts in chemistry
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Which of the following atoms should have the highest"telectron affinity?
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Dec 14, 2021
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Some basic concepts in chemistry
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The ground state magnetic property of Bzand C \(_{2}\) molecules will be
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Dec 14, 2021
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Some basic concepts in chemistry
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Dissolving NaCN in de-ionized water will result in a solution having
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Dec 14, 2021
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Some basic concepts in chemistry
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\(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~F}^{18}\) is a \(\mathrm{F}^{8}\) radio-isotope labelled organic compound. \(\mathrm{P}^{8}\) decays by positron emission. the product resulting or decay is
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Some basic concepts in chemistry
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In a flask, the weight ratio of \(\mathrm{CH}(\mathrm{g})\) and \(\mathrm{SO}_{2}(\mathrm{~g})\) at \(298 \mathrm{~K}\) and 1 bar is \(1: 2\). The ratio of the number of molecules off \(\mathrm{SO}_{2}(\mathrm{~g})\) and \(\mathrm{CH}_{4}(\mathrm{~g})\) is
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Some basic concepts in chemistry
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\(0.126 \mathrm{~g}\) of an acid is needed to completely neutralize \(20 \mathrm{ml} 0.1\) (N) NaOH solution. The equivalent weight of the acid is
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Dec 14, 2021
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Some basic concepts in chemistry
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Which of the following sets of quantum numbers represents the Electron of \(\mathrm{Cr}(\mathrm{Z}=24) ?\)
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Dec 14, 2021
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Some basic concepts in chemistry
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If the given four electronic configurations (i) \(n=4, l=1\) (ii) \(\mathrm{n}=4, l=0\) (iii) \(\mathrm{n}=3, l=2\) (iv) \(\mathrm{n}=3, l=1\) are arranged in order of increasing energy, then the order will be
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Some basic concepts in chemistry
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Which of the following has the dimension of \(\mathrm{ML}^{0} \mathrm{~T}^{-2}\) ?
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Dec 14, 2021
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Kinematics
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A small steel ball bounces on a steel plate held horizontally. On each bounce the speed of the ball arriving at the plate is reduced by a factor e (coefficient of restitution) in the rebound, so that $$ \mathrm{V}_{\text {upward }}=\mathrm{eV}_{\text {downward }} $$ If the ball is initially dropped from a height of \(0.4 \mathrm{~m}\) above the plate and if 10 seconds later the bouncing ceases, he value of \(e\) is
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Dec 14, 2021
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Kinematics
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