Recent questions in Some basic concepts in chemistry

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A gaseous hydrocarbon gives upon combustion, \(0.72 \mathrm{~g}\) of water and \(3.08 \mathrm{~g}\) of \(\mathrm{CO}_{2}\). The empirical formula of the hydrocarbon is

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Solid CO2 is an example of _____

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\(\mathrm{XeF}_{4}\) on partial hydrolysis produces

asked Dec 23, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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A 5% solution of cane sugar (mol. wt. = 342) is isotonic with 1% solution of a substance X. The molecular weight of , X is

asked Dec 23, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The coordination number of atoms in bcc crystal lattice is

asked Dec 22, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The set with correct order of acidity is

asked Dec 22, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Which pair of species have same percentage of carbon?

asked Dec 22, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The equivalent weight of \(\mathrm{MnSO}_{4}\) is half its molecular weight when it is converted to

asked Dec 21, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Sucrose on hydrolysis gives :

asked Dec 21, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Aniline, chloroform and alc. KOH on heating give :

asked Dec 21, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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A buffer solution is prepared in which the concentration of \(\mathrm{NH}_{3}\) is \(0.30 \mathrm{M}\) and the concentration of \(\mathrm{NH}_{4}^{+}\)is \(0.20 \mathrm{M}\). If the equilibrium constant, \(\mathrm{K}_{\mathrm{b}}\) for \(\mathrm{NH}_{3}\) equals \(1.8 \mathrm{x}\) \(10^{-5}\), what is the pH of this solution? ( \(\log 2.7=0.43\) )

asked Dec 20, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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\(\mathrm{KF}\) combines with \(\mathrm{HF}\) to form \(\mathrm{KHF}_{2}\). This compound contains the species

asked Dec 20, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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An isotone of \({ }^{76}{ }_{32} \mathrm{Ge}\) is -

asked Dec 20, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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A solution containing \(10 \mathrm{~g}\) per \(\mathrm{dm}^{3}\) of urea (molecular mass \(=60 \mathrm{~g} \mathrm{~mol}^{-1}\) ) is isotonic with a \(5 \%\) solution of a nonvolatile solute is

asked Dec 20, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The volume strength of 1.5 N H2O2 solution is

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Define one coulomb.

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The dissociation constant for acetic acid and \(\mathrm{HCN}\) at \(25^{\circ} \mathrm{C}\) are \(1.5 \times 10^{-5}\) and \(4.5 \times 10^{-10}\) respectively. the equilibrium constant for reaction \(\mathrm{CN}^{-}+\mathrm{CH}_{3}\) \(\mathrm{COOH} \leftrightharpoons \mathrm{HCN}+\mathrm{CH}_{3} \mathrm{COO}^{-}\)

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The Gibb's energy for the decomposition of \(\mathrm{Al}_{2} \mathrm{O}_{3}\) at \(500^{\circ} \mathrm{C}\) is as follows: $$ 2 / 3 \mathrm{Al}_{2} \mathrm{O}_{3} \longrightarrow 4 / 3 \mathrm{Al}+\mathrm{O}_{2}, \Delta_{r} G=+966 \mathrm{~kJ} \mathrm{~mol}^{-1} $$ The potential difference needed for electrolytic reduction of \(\mathrm{Al}_{2} \mathrm{O}_{3}\) at \(500^{\circ} \mathrm{C}\) is at least

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Equal masses of \(\mathrm{H}_{2}, \mathrm{O}_{2}\) and methane have been taken in a container of volume \(\mathrm{V}\) at temperature \(27^{\circ} \mathrm{C}\) in identical conditions. The ratio of the volumes of gases \(\mathrm{H}_{2}: \mathrm{O}_{2}\) : methane would be

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Derive an expression for Nernst equation

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Recent questions in Some basic concepts in chemistry

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