Recent questions in Chemistry

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Which one of the following is correct for all elements from Sc to Cu?

asked Dec 28, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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IF \(\mathrm{NaCl}\) is doped with \(10^{-4}\) mol \(\%\) of \(\mathrm{SrCl}_{2}\), the concentration of cation vacancies will \(b e\left(\mathrm{~N}_{\mathrm{A}}=6.02 \times 10^{23} \mathrm{~mol}^{-1}\right)\)

asked Dec 25, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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A compound is formed by cation \(C\) and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy \(75 \%\) of octahedral voids. The formula of the compound is:

asked Dec 25, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Benzyl amine reacts with nitrous acid to form

asked Dec 24, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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The oxide, which cannot act as a reducing agent is

asked Dec 24, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Which of the following statements is incorrect

asked Dec 24, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Both CO2 and H2 gases are

asked Dec 24, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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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

asked Dec 24, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

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Solid CO2 is an example of _____

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

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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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