NEET Chemistry MCQ: NCERT Mole Concept

🎯Difficulty :Hard

🔄Ncert Concepts :Mole Concept, Empirical Formula, Percentage Composition

Related Questions

Which of the following has the maximum number of electrons

O⁻²

Na⁺

F⁻

All the given species have same number of electrons

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🔄Ncert Concepts :moles, molar mass, number of electrons, ions

Maximum no. of atoms are present in

$8g\,C{H_4}$

$8g\,{C_6}{H_{12}}{O_6}$

$25g\,CaC{O_3}$

$28g\,CO$

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🔄Ncert Concepts :molar mass, moles, Avogadro's number, number of atoms in a molecule

Which of the following samples contain the least number of atoms

$1g\,\,of\,C{O_2}\left( g \right)$

$1g\,of\,{C_8}{H_{18}}\left( l \right)$

$1g\,of\,{C_2}{H_6}\left( g \right)$

$1g\,of\,LiF\left( s \right)$

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🎓 Ncert Level:Analyzing

🔄Ncert Concepts :molar mass, moles, number of atoms, Avogadro's number

Which of the following pair of gases contain the same number of molecules?

$16{\rm{g}}{{\rm{O}}_2},14{\rm{g}}{{\rm{N}}_2}$

$8{\rm{g}}{{\rm{O}}_2},22{\rm{g}}{{\rm{N}}_2}$

$28{\rm{g}}{{\rm{N}}_2},22{\rm{g C}}{{\rm{O}}_2}$

$32{\rm{g}}{{\rm{O}}_2},32{\rm{g}}{{\rm{N}}_2}$

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🔄Ncert Concepts :moles, molar mass, Avogadro's number

In which case is the number of molecules of water maximum ?

$\,{\rm{1}}{{\rm{0}}^{{\rm{ - 3}}}}\,{\rm{mol}}\,\,{\rm{of}}\,{\rm{water}}$

${\rm{18}}\,{\rm{mL}}\,{\rm{of}}\,{\rm{water}}$

$\,{\rm{0}}{\rm{.00224}}\,{\rm{L}}\,\,{\rm{of}}\,{\rm{water}}\,{\rm{vapours}}\,\,{\rm{at 1 atm }}\,{\rm{and }}\,{\rm{273}}\,\,{\rm{K}}$

${\rm{0}}{\rm{.18}}\,\,{\rm{g}}\,\,{\rm{of}}\,\,{\rm{water}}$

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🎓 Ncert Level:Analyzing

🔄Ncert Concepts :moles, density, molar mass, Avogadro's number, ideal gas law

13.5 g aluminium changes to ${\rm{A}}{{\rm{l}}^{3 + }}ion$ in solution by losing :

$18 imes {10^{23}}$ electrons

$6.023 imes {10^{23}}$ electrons

$3.01 imes {10^{23}}$ electrons

$9 imes {10^{23}}$ electrons

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🔄Ncert Concepts :moles, atomic mass, ionization, electron count, avogadro's number

Which gas contains larger number of molecules?

$4{\rm{g}}\;{\rm{of}}{\mkern 1mu} \;{{\rm{H}}_2}{\rm{O}}$

$2{\rm{g}}\;{\rm{of}}\;{\rm{marsh}}\;{\rm{gas}}$

$4{\rm{g}}\;{\rm{of}}{\mkern 1mu}  \;{\rm{PC}}{{\rm{l}}_5}$

$2{\rm{g}}\;{\rm{of}}\;{\rm{phosgene}}$

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🔄Ncert Concepts :moles, molar mass, Avogadro's number

The number of Na atoms in 46 g ‘Na”

$6.023{\mkern 1mu} {\mkern 1mu}  imes {\mkern 1mu} {\mkern 1mu} {10^{23}}$

$12.046{\mkern 1mu} {\mkern 1mu}  imes {\mkern 1mu} {\mkern 1mu} {10^{23}}$

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🔄Ncert Concepts :Moles, Avogadro's Number, Atomic Mass

Number of atoms in 3 mol of $N{H_3}$

$7.22 imes {10^{24}}$ atoms

$7.22 imes {10^{23}}$ atoms

$7.22 imes {10^{25}}$ atoms

All of these

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🔄Ncert Concepts :Avogadro's number, moles, chemical formula

10.

The total number of electrons in 18 ml of water (density = 1/gml

$6.023\,\, imes \,\,{10^{^{25}}}$

$6.023\,\, imes \,\,{10^{^{24}}}$

$6.023\,\, imes \,18\,\, imes \,\,{10^{^{23}}}$

$6.023\,\, imes \,\,{10^{^{23}}}$

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