Stoichiometry and its Calculations
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307047 25 kg of \({{\rm{N}}_{\rm{2}}}{\rm{(g)}}\) and 5 kg of \({{\rm{H}}_{\rm{2}}}{\rm{(g)}}\) are mixed to produce \({\rm{N}}{{\rm{H}}_{\rm{3}}}{\rm{(g)}}\). The limiting reagent in the production of \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}\)
4 Both \({{\rm{N}}_{\rm{2}}}{\rm{\& }}{\mkern 1mu} {\mkern 1mu} {{\rm{H}}_{\rm{2}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307048 The right option for the mass of \(\mathrm{CO}_{2}\) produced by heating \(20 \mathrm{~g}\) of \(20 \%\) pure limestone is (Atomic mass of \(\mathrm{Ca}=40\) )
\(\left[ {{\text{CaC}}{{\text{O}}_{\text{3}}}\xrightarrow{{{\text{1200 K}}}}{\text{CaO + C}}{{\text{O}}_{\text{2}}}} \right]\)

1 \(1.76 \mathrm{~g}\)
2 \(2.64 \mathrm{~g}\)
3 \(1.32 \mathrm{~g}\)
4 \(1.12 \mathrm{~g}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307049 The hydrated salt \({\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{C}}{{\rm{O}}_{\rm{3}}}{\rm{.x}}{{\rm{H}}_{\rm{2}}}{\rm{O}}\) undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is

1 10
2 12
3 8
4 18
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307050 The mass of carbon anode consumed (giving only \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)) in the production of 270 kg of aluminum metal from bauxite by the Hall process is

1 90 kg
2 540 kg
3 180 kg
4 270 kg
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307047 25 kg of \({{\rm{N}}_{\rm{2}}}{\rm{(g)}}\) and 5 kg of \({{\rm{H}}_{\rm{2}}}{\rm{(g)}}\) are mixed to produce \({\rm{N}}{{\rm{H}}_{\rm{3}}}{\rm{(g)}}\). The limiting reagent in the production of \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}\)
4 Both \({{\rm{N}}_{\rm{2}}}{\rm{\& }}{\mkern 1mu} {\mkern 1mu} {{\rm{H}}_{\rm{2}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307048 The right option for the mass of \(\mathrm{CO}_{2}\) produced by heating \(20 \mathrm{~g}\) of \(20 \%\) pure limestone is (Atomic mass of \(\mathrm{Ca}=40\) )
\(\left[ {{\text{CaC}}{{\text{O}}_{\text{3}}}\xrightarrow{{{\text{1200 K}}}}{\text{CaO + C}}{{\text{O}}_{\text{2}}}} \right]\)

1 \(1.76 \mathrm{~g}\)
2 \(2.64 \mathrm{~g}\)
3 \(1.32 \mathrm{~g}\)
4 \(1.12 \mathrm{~g}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307049 The hydrated salt \({\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{C}}{{\rm{O}}_{\rm{3}}}{\rm{.x}}{{\rm{H}}_{\rm{2}}}{\rm{O}}\) undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is

1 10
2 12
3 8
4 18
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307050 The mass of carbon anode consumed (giving only \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)) in the production of 270 kg of aluminum metal from bauxite by the Hall process is

1 90 kg
2 540 kg
3 180 kg
4 270 kg
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307047 25 kg of \({{\rm{N}}_{\rm{2}}}{\rm{(g)}}\) and 5 kg of \({{\rm{H}}_{\rm{2}}}{\rm{(g)}}\) are mixed to produce \({\rm{N}}{{\rm{H}}_{\rm{3}}}{\rm{(g)}}\). The limiting reagent in the production of \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}\)
4 Both \({{\rm{N}}_{\rm{2}}}{\rm{\& }}{\mkern 1mu} {\mkern 1mu} {{\rm{H}}_{\rm{2}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307048 The right option for the mass of \(\mathrm{CO}_{2}\) produced by heating \(20 \mathrm{~g}\) of \(20 \%\) pure limestone is (Atomic mass of \(\mathrm{Ca}=40\) )
\(\left[ {{\text{CaC}}{{\text{O}}_{\text{3}}}\xrightarrow{{{\text{1200 K}}}}{\text{CaO + C}}{{\text{O}}_{\text{2}}}} \right]\)

1 \(1.76 \mathrm{~g}\)
2 \(2.64 \mathrm{~g}\)
3 \(1.32 \mathrm{~g}\)
4 \(1.12 \mathrm{~g}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307049 The hydrated salt \({\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{C}}{{\rm{O}}_{\rm{3}}}{\rm{.x}}{{\rm{H}}_{\rm{2}}}{\rm{O}}\) undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is

1 10
2 12
3 8
4 18
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307050 The mass of carbon anode consumed (giving only \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)) in the production of 270 kg of aluminum metal from bauxite by the Hall process is

1 90 kg
2 540 kg
3 180 kg
4 270 kg
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307047 25 kg of \({{\rm{N}}_{\rm{2}}}{\rm{(g)}}\) and 5 kg of \({{\rm{H}}_{\rm{2}}}{\rm{(g)}}\) are mixed to produce \({\rm{N}}{{\rm{H}}_{\rm{3}}}{\rm{(g)}}\). The limiting reagent in the production of \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) is

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}\)
4 Both \({{\rm{N}}_{\rm{2}}}{\rm{\& }}{\mkern 1mu} {\mkern 1mu} {{\rm{H}}_{\rm{2}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307048 The right option for the mass of \(\mathrm{CO}_{2}\) produced by heating \(20 \mathrm{~g}\) of \(20 \%\) pure limestone is (Atomic mass of \(\mathrm{Ca}=40\) )
\(\left[ {{\text{CaC}}{{\text{O}}_{\text{3}}}\xrightarrow{{{\text{1200 K}}}}{\text{CaO + C}}{{\text{O}}_{\text{2}}}} \right]\)

1 \(1.76 \mathrm{~g}\)
2 \(2.64 \mathrm{~g}\)
3 \(1.32 \mathrm{~g}\)
4 \(1.12 \mathrm{~g}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307049 The hydrated salt \({\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{C}}{{\rm{O}}_{\rm{3}}}{\rm{.x}}{{\rm{H}}_{\rm{2}}}{\rm{O}}\) undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is

1 10
2 12
3 8
4 18
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307050 The mass of carbon anode consumed (giving only \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)) in the production of 270 kg of aluminum metal from bauxite by the Hall process is

1 90 kg
2 540 kg
3 180 kg
4 270 kg