Recent questions in Some basic concepts in chemistry

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Among the following the extensive variables are

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Which statements are correct for the peroxide ion?

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\([\mathrm{X}]+\) dil. \(\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow[\mathrm{Y}]:\) Colourless, suffocating gas \([\mathrm{Y}]+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow\) Green colouration of solution

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During a reversible adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio \(\frac{C_{p}}{C_{v}}\) for the gas is

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A metal \(M\) (specific heat \(0.16\) ) forms a metal chloride with \(=65 \%\) chlorine present in it. The formula of the metal chloride will be

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The number of possible organobromine compounds, which can be obtained in the allylic bromination of 1 - butene with \(\mathrm{N}\) - bromosuccinimide is

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$$ \begin{aligned} &{[\mathrm{P}] \stackrel{\mathrm{Br}_{2}}{\longrightarrow} \mathrm{C}_{2} \mathrm{H}_{4} \mathrm{Br}_{2} \underset{\mathrm{NH}_{3}}{\stackrel{\mathrm{NaNH}_{2}}{\longrightarrow}}[\mathrm{Q}]} \\ &{[\mathrm{Q}] \stackrel{20 \% \mathrm{H}_{2} \mathrm{SO}_{4}}{\mathrm{Hg}^{2}+\Delta}[\mathrm{R}] \stackrel{\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}}{\longrightarrow}[\mathrm{S}]} \end{aligned} $$ The species \(\mathrm{P}, \mathrm{Q}, \mathrm{R}\) and \(\mathrm{S}\) respectively are

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Which of the following is least thermally stable?

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At room temperature, the reaction between water and fluorine produces

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Out of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one ?

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Which of the set of oxides are arranged in the proper order of basic, amphoteric, acidic?

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Which of the following is present in maximum amount in 'acid rain' ?

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Which one of the following is a condensation polymer?

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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

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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

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

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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

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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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