Recent questions in Chemistry

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\(\mathrm{K}_{\mathrm{t}}\) (water) \(=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\). The temperature at which ice begins to separate from a mixture of 10 mass \(\%\) ethylene glycol is

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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An ideal gas expands adiabatically against vaccum. Which of the following is correct for the given process? (A) \(\Delta S=0\)

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Equal masses of ethane and hydrogen are mixed in a empty container at \(298 \mathrm{~K}\). The fraction of total pressure exerted by hydrogen is

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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At \(273 \mathrm{~K}\) temperature and \(76 \mathrm{~cm} \mathrm{Hg}\) pressure, the density of a gas is \(1.964 \mathrm{gL}^{-1}\). The gas is

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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\(5 \mathrm{ml}\) of \(0.1 \mathrm{M} \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\) is mixed with \(10 \mathrm{ml}\) of \(0.02 \mathrm{M} \mathrm{KI}\). The amount of Pbl \(_{2}\) precipitated will be about

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The mole fraction of ethanol in water is \(0.08\). Its molality is

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Among the following, the ion which will be more effective for flocculation of \(\mathrm{Fe}(\mathrm{OH})_{3}\) sol. is

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The equilibrium constant for the following reactions are given at \(25^{\circ} \mathrm{C}\) $$ \begin{aligned} &2 A \rightleftharpoons B+C, K_{1}=1.0 \\ &2 B \rightleftharpoons C+D, K_{2}=16 \\ &2 C+D \rightleftharpoons 2 P, K_{3}=25 \end{aligned} $$ The equilibrium constant for the reaction \(\mathrm{P} \rightleftharpoons \mathrm{A}+\frac{1}{2} \mathrm{~B}\) at \(25^{\circ} \mathrm{C}\) is

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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In the face-centred cubic lattice structure of gold the closest distance between gold atoms is 'a' being the edge ength of the cubic unit cell

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The maximum number of electrons in an atom in which the last electron filled has the quantum numbers \(n=3, I=2\) and \(m=-1\) is

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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For the following carbocations the correct order of stability is

asked Dec 11, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Angle between the planes x+y+2z=6 and 2x–y+z=9 is

asked Dec 7, 2021 in Some basic concepts in chemistry by deepak01 (12.2k points)

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