Mole Concept and Molar Mass
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306809 If we consider that\(\frac{{\rm{1}}}{{\rm{6}}}\), in place of \(\frac{{\rm{1}}}{{{\rm{12}}}}\), mass of carbon atom is taken to be the relative mass unit, the mass of one mole of a substance will

1 Decrease twice
2 Increase two fold
3 Remain unchanged
4 Be a function of the molecular mass of the substance
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306788 A 19.6 g of a given gaseous sample contains 2.8 g of molecules \(\left( {{\rm{d = }}\,{\rm{0}}.{\rm{75}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}}} \right),{\rm{11}}.{\rm{2}}\;{\rm{g}}\) of molecules \(\left( {{\rm{d}}\,{\rm{ = }}\,{\rm{3}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}}} \right)\) and 5.6 g of molecules \(({\rm{d}}\,{\rm{ = 1}}.{\rm{5}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}})\). All density measurements are made at STP. Calculate the total number of molecules ( \({\mathrm{N}}\) ) present in the given sample. Report your answer in ' \({\mathrm{10^{23} \mathrm{~N}}}\)'. Assume Avogadro's number as \({\mathrm{6 \times 10^{23}}}\).

1 0.5
2 5
3 3
4 0.05
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306789 An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlorine present in 1g of chlorohydrocarbon are: (Atomic wt. of Cl u = 35.5u ; Avogadro number
\({\rm{ = 6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{23}}}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\))

1 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{\rm{9}}}\)
2 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
3 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{21}}}}\)
4 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{20}}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306790 The number of moles of \(\mathrm{H}_{2} \mathrm{O}\) in one litre is

1 50.5
2 55
3 55.05
4 55.55
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306809 If we consider that\(\frac{{\rm{1}}}{{\rm{6}}}\), in place of \(\frac{{\rm{1}}}{{{\rm{12}}}}\), mass of carbon atom is taken to be the relative mass unit, the mass of one mole of a substance will

1 Decrease twice
2 Increase two fold
3 Remain unchanged
4 Be a function of the molecular mass of the substance
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306788 A 19.6 g of a given gaseous sample contains 2.8 g of molecules \(\left( {{\rm{d = }}\,{\rm{0}}.{\rm{75}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}}} \right),{\rm{11}}.{\rm{2}}\;{\rm{g}}\) of molecules \(\left( {{\rm{d}}\,{\rm{ = }}\,{\rm{3}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}}} \right)\) and 5.6 g of molecules \(({\rm{d}}\,{\rm{ = 1}}.{\rm{5}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}})\). All density measurements are made at STP. Calculate the total number of molecules ( \({\mathrm{N}}\) ) present in the given sample. Report your answer in ' \({\mathrm{10^{23} \mathrm{~N}}}\)'. Assume Avogadro's number as \({\mathrm{6 \times 10^{23}}}\).

1 0.5
2 5
3 3
4 0.05
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306789 An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlorine present in 1g of chlorohydrocarbon are: (Atomic wt. of Cl u = 35.5u ; Avogadro number
\({\rm{ = 6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{23}}}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\))

1 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{\rm{9}}}\)
2 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
3 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{21}}}}\)
4 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{20}}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306790 The number of moles of \(\mathrm{H}_{2} \mathrm{O}\) in one litre is

1 50.5
2 55
3 55.05
4 55.55
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306809 If we consider that\(\frac{{\rm{1}}}{{\rm{6}}}\), in place of \(\frac{{\rm{1}}}{{{\rm{12}}}}\), mass of carbon atom is taken to be the relative mass unit, the mass of one mole of a substance will

1 Decrease twice
2 Increase two fold
3 Remain unchanged
4 Be a function of the molecular mass of the substance
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306788 A 19.6 g of a given gaseous sample contains 2.8 g of molecules \(\left( {{\rm{d = }}\,{\rm{0}}.{\rm{75}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}}} \right),{\rm{11}}.{\rm{2}}\;{\rm{g}}\) of molecules \(\left( {{\rm{d}}\,{\rm{ = }}\,{\rm{3}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}}} \right)\) and 5.6 g of molecules \(({\rm{d}}\,{\rm{ = 1}}.{\rm{5}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}})\). All density measurements are made at STP. Calculate the total number of molecules ( \({\mathrm{N}}\) ) present in the given sample. Report your answer in ' \({\mathrm{10^{23} \mathrm{~N}}}\)'. Assume Avogadro's number as \({\mathrm{6 \times 10^{23}}}\).

1 0.5
2 5
3 3
4 0.05
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306789 An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlorine present in 1g of chlorohydrocarbon are: (Atomic wt. of Cl u = 35.5u ; Avogadro number
\({\rm{ = 6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{23}}}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\))

1 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{\rm{9}}}\)
2 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
3 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{21}}}}\)
4 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{20}}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306790 The number of moles of \(\mathrm{H}_{2} \mathrm{O}\) in one litre is

1 50.5
2 55
3 55.05
4 55.55
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306809 If we consider that\(\frac{{\rm{1}}}{{\rm{6}}}\), in place of \(\frac{{\rm{1}}}{{{\rm{12}}}}\), mass of carbon atom is taken to be the relative mass unit, the mass of one mole of a substance will

1 Decrease twice
2 Increase two fold
3 Remain unchanged
4 Be a function of the molecular mass of the substance
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306788 A 19.6 g of a given gaseous sample contains 2.8 g of molecules \(\left( {{\rm{d = }}\,{\rm{0}}.{\rm{75}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}}} \right),{\rm{11}}.{\rm{2}}\;{\rm{g}}\) of molecules \(\left( {{\rm{d}}\,{\rm{ = }}\,{\rm{3}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}}} \right)\) and 5.6 g of molecules \(({\rm{d}}\,{\rm{ = 1}}.{\rm{5}}\;{\rm{g\;}}{{\rm{L}}^{{\rm{ - 1}}}})\). All density measurements are made at STP. Calculate the total number of molecules ( \({\mathrm{N}}\) ) present in the given sample. Report your answer in ' \({\mathrm{10^{23} \mathrm{~N}}}\)'. Assume Avogadro's number as \({\mathrm{6 \times 10^{23}}}\).

1 0.5
2 5
3 3
4 0.05
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306789 An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlorine present in 1g of chlorohydrocarbon are: (Atomic wt. of Cl u = 35.5u ; Avogadro number
\({\rm{ = 6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{23}}}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\))

1 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{\rm{9}}}\)
2 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
3 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{21}}}}\)
4 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{20}}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306790 The number of moles of \(\mathrm{H}_{2} \mathrm{O}\) in one litre is

1 50.5
2 55
3 55.05
4 55.55