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The following equilibrium constants are given: $$ \begin{aligned} &\mathrm{N}_{2}+3 \mathrm{~N}_{2} \rightleftharpoons 2 \mathrm{NH}_{3} ; \mathrm{K}_{1} \\ &\mathrm{~N}_{2}+\mathrm{O}_{2} \rightleftharpoons 2 \mathrm{NO} ; \mathrm{K}_{2} \\ &\mathrm{H}_{2}+\frac{1}{2} \mathrm{O}_{2} \rightleftharpoons \mathrm{H}_{2} \mathrm{O} ; \mathrm{K}_{3} \end{aligned} $$ The equilibrium constant for the oxidation of \(2 \mathrm{~mol}\) of \(\mathrm{NH}_{3}\) to give \(\mathrm{NO}\) is

asked Dec 12, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Given the standard half-cell potentials \(\left(\mathrm{E}^{\circ}\right)\) of the following as $$ \begin{array}{ll} \mathrm{Zn}=\mathrm{Zn}^{2+}+2 \mathrm{e}^{-} & \mathrm{E}^{0}=+0.76 \mathrm{~V} \\ \mathrm{Fe}=\mathrm{Fe}^{2+}+2 \mathrm{e}^{-} & \mathrm{E}^{0}=0.41 \mathrm{~V} \end{array} $$ Then the standard e.m.f. of the cell with the reaction \(\mathrm{Fe}^{2+}+\mathrm{Zn} \rightarrow \mathrm{Zn}^{2+}+\mathrm{Fe}\) is

asked Dec 12, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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What amount of electricity can deposit 1 mole of \(\mathrm{Al}\) metal at cathode when passed through molten \(\mathrm{AICl}_{3}\) ?

asked Dec 12, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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A compound formed by elements \(X\) and \(Y\) crystallizes in the cubic structure, where \(X\) atoms are at the corners of a cube and \(\mathrm{Y}\) atoms are at the centres of the body. The formula of the compound is

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The heat of neutralization of a strong base and a strong acid is \(13: 7 \mathrm{kcal}\). The heat released when \(0.6 \mathrm{~mole} \mathrm{HCl}\) solution is added to \(0.25\) mole of \(\mathrm{NaOH}\) is

asked Dec 12, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Equal weights of ethane and hydrogen are mixed in an empty container at \(25^{\circ} \mathrm{C}\). The The fraction of total pressure exerted by hydrogen is

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How many moles of electrons will weigh one kilogram ?

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The nucleus \({ }_{29}^{64} \mathrm{Cu}\) accepts an orbital electron to yield,

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Ferric ion forms a Prussian blue precipitate due to the formation of

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The half life of \(\mathrm{C}^{14}\) is 5760 years. For a \(200 \mathrm{mg}\) sample of \(\mathrm{C}^{14}\), the time taken to change to \(25 \mathrm{mg}\) is

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Which of the following has the strongest H-bond?

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The number of unpaired electrons in Ni (atomic number = 28) are

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Which of the following eletronic configuration is not possible ?

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If aniline is treated with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and heated at \(200^{\circ} \mathrm{C}\), the product is

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Methoxybenzene on treatment with HI produces

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The number of alkene (s) which can produce 2-butanol by the successive treatment of (i) \(\mathrm{B}_{2} \mathrm{H}_{6}\) in tetrahydrofuran solvent and (ii) alkaline \(\mathrm{H}_{2} \mathrm{O}_{2}\) solution is

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\(\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C} \mathrm{MgBr}\) can be prepared by the reaction of

asked Dec 12, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The ease of hydrolysis in the compounds \(\mathrm{CH}_{3} \mathrm{COCl}\) (I), \(\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{O}-\mathrm{COCH}_{3}(\mathrm{II}), \mathrm{CH}_{3} \mathrm{COOC}_{2} \mathrm{H}_{5}(\mathrm{III})\) and \(\mathrm{CH}_{3} \mathrm{CONH}_{2}\) (IV) is of the order

asked Dec 12, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Silver chloride dissolves in excess of ammonium hydroxide solution. The cation present in the resulting solution is

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The main reason the \(\mathrm{SiCl}_{4}\) is easily hydrolysed as compared to \(\mathrm{CCl}_{4}\) is that

asked Dec 12, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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