Empirical Formula and Molecular Formula
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306618 2.4 g of sample of magnesium when burnt in excess of \({\mathrm{\mathrm{O}_{2}}}\) gives 3.84 g of magnesium oxide. The percentage purity of magnesium in the sample is ____ \({\mathrm{\%}}\).
[Molar mass of \({\mathrm{\mathrm{MgO}=40 \mathrm{~g} \mathrm{~mol}^{-1}}}\) ]

1 38.4
2 96
3 100
4 55
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306619 Empirical formula of a compound is CH. If the molar mass of the compound is 78, the molecular formula is

1 \({{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}\)
2 \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{3}}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
4 \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{6}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306620 Choose the incorrect formula out of the four compounds for an element X below:

1 \({{\rm{X}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
2 \({{\rm{X}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{X}}_{\rm{2}}}{{\rm{(S}}{{\rm{O}}_{\rm{4}}}{\rm{)}}_{\rm{3}}}\)
4 \({\rm{XP}}{{\rm{O}}_{\rm{4}}}\)
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306621 A compound X contains \(32 \%\) of \(\mathrm{A}, 20 \%\) of B and remaining percentage of C . Then, the empirical formula of X is : (Given atomic masses of \(\mathrm{A}=64 ; \mathrm{B}=40\);\(\mathrm{C}=32 \mathrm{u}\) )

1 \(\mathrm{A}_{2} \mathrm{BC}_{2}\)
2 \(\mathrm{ABC}_{3}\)
3 \(\mathrm{AB}_{2} \mathrm{C}_{2}\)
4 \(\mathrm{ABC}_{4}\)
NEET - 2024
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306618 2.4 g of sample of magnesium when burnt in excess of \({\mathrm{\mathrm{O}_{2}}}\) gives 3.84 g of magnesium oxide. The percentage purity of magnesium in the sample is ____ \({\mathrm{\%}}\).
[Molar mass of \({\mathrm{\mathrm{MgO}=40 \mathrm{~g} \mathrm{~mol}^{-1}}}\) ]

1 38.4
2 96
3 100
4 55
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306619 Empirical formula of a compound is CH. If the molar mass of the compound is 78, the molecular formula is

1 \({{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}\)
2 \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{3}}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
4 \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{6}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306620 Choose the incorrect formula out of the four compounds for an element X below:

1 \({{\rm{X}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
2 \({{\rm{X}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{X}}_{\rm{2}}}{{\rm{(S}}{{\rm{O}}_{\rm{4}}}{\rm{)}}_{\rm{3}}}\)
4 \({\rm{XP}}{{\rm{O}}_{\rm{4}}}\)
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306621 A compound X contains \(32 \%\) of \(\mathrm{A}, 20 \%\) of B and remaining percentage of C . Then, the empirical formula of X is : (Given atomic masses of \(\mathrm{A}=64 ; \mathrm{B}=40\);\(\mathrm{C}=32 \mathrm{u}\) )

1 \(\mathrm{A}_{2} \mathrm{BC}_{2}\)
2 \(\mathrm{ABC}_{3}\)
3 \(\mathrm{AB}_{2} \mathrm{C}_{2}\)
4 \(\mathrm{ABC}_{4}\)
NEET - 2024
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306618 2.4 g of sample of magnesium when burnt in excess of \({\mathrm{\mathrm{O}_{2}}}\) gives 3.84 g of magnesium oxide. The percentage purity of magnesium in the sample is ____ \({\mathrm{\%}}\).
[Molar mass of \({\mathrm{\mathrm{MgO}=40 \mathrm{~g} \mathrm{~mol}^{-1}}}\) ]

1 38.4
2 96
3 100
4 55
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306619 Empirical formula of a compound is CH. If the molar mass of the compound is 78, the molecular formula is

1 \({{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}\)
2 \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{3}}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
4 \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{6}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306620 Choose the incorrect formula out of the four compounds for an element X below:

1 \({{\rm{X}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
2 \({{\rm{X}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{X}}_{\rm{2}}}{{\rm{(S}}{{\rm{O}}_{\rm{4}}}{\rm{)}}_{\rm{3}}}\)
4 \({\rm{XP}}{{\rm{O}}_{\rm{4}}}\)
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306621 A compound X contains \(32 \%\) of \(\mathrm{A}, 20 \%\) of B and remaining percentage of C . Then, the empirical formula of X is : (Given atomic masses of \(\mathrm{A}=64 ; \mathrm{B}=40\);\(\mathrm{C}=32 \mathrm{u}\) )

1 \(\mathrm{A}_{2} \mathrm{BC}_{2}\)
2 \(\mathrm{ABC}_{3}\)
3 \(\mathrm{AB}_{2} \mathrm{C}_{2}\)
4 \(\mathrm{ABC}_{4}\)
NEET - 2024
Join With Us for More Updates
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306618 2.4 g of sample of magnesium when burnt in excess of \({\mathrm{\mathrm{O}_{2}}}\) gives 3.84 g of magnesium oxide. The percentage purity of magnesium in the sample is ____ \({\mathrm{\%}}\).
[Molar mass of \({\mathrm{\mathrm{MgO}=40 \mathrm{~g} \mathrm{~mol}^{-1}}}\) ]

1 38.4
2 96
3 100
4 55
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306619 Empirical formula of a compound is CH. If the molar mass of the compound is 78, the molecular formula is

1 \({{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}\)
2 \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{3}}}\)
3 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
4 \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{6}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306620 Choose the incorrect formula out of the four compounds for an element X below:

1 \({{\rm{X}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
2 \({{\rm{X}}_{\rm{2}}}{\rm{C}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{X}}_{\rm{2}}}{{\rm{(S}}{{\rm{O}}_{\rm{4}}}{\rm{)}}_{\rm{3}}}\)
4 \({\rm{XP}}{{\rm{O}}_{\rm{4}}}\)
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306621 A compound X contains \(32 \%\) of \(\mathrm{A}, 20 \%\) of B and remaining percentage of C . Then, the empirical formula of X is : (Given atomic masses of \(\mathrm{A}=64 ; \mathrm{B}=40\);\(\mathrm{C}=32 \mathrm{u}\) )

1 \(\mathrm{A}_{2} \mathrm{BC}_{2}\)
2 \(\mathrm{ABC}_{3}\)
3 \(\mathrm{AB}_{2} \mathrm{C}_{2}\)
4 \(\mathrm{ABC}_{4}\)
NEET - 2024
For More Updates join with Us