Stoichiometry and its Calculations
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307008 The amount of arsenic pentasulphide that can be obtained when 35.5 g arsenic acid is treated with excess \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) in the presence of conc. HCl (assuming 100% conversion) is:

1 0.25 mol
2 0.50 mol
3 0.333 mol
4 0.125 mol
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307009 Which of the following statements is correct about the reaction given below?
\({\rm{4Fe(s) + 3}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(g)}}\)

1 Total mass of iron and oxygen in reactants = total mass of iron and oxygen on product therefore it follows law of conservation of mass.
2 Total mass of reactants = total massof product; therefore, law of multiple proportions is followed.
3 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) can be increased by taking any one of the reactants (iron or oxygen) in excess.
4 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307010 n g of a substance X reacts with m g of substance Y to form p g of substance R and q g of substance S.
This reaction can be represented as follow : \({\rm{X + Y = R + S}}\)
The relation which can be established in the amounts of the reactants and the products will be

1 n – m = p – q
2 n + m = p + q
3 n = m
4 p = q
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307011 Liquid benzene burns in oxygen according to following equation
\({\rm{2}}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}{\rm{ + 15}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{12C}}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 6}}{{\rm{H}}_{\rm{2}}}{\rm{O(g)}}\)
How many litres of oxygen are required for complete combustion of 39 g of liquid benzene?

1 11.2
2 22.4
3 42
4 84
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307012 What volume of \(\mathrm{CO}_{2}\) will be liberated at \(\mathrm{NTP}\), if \(12 \mathrm{~g}\) of carbon is burnt in excess of oxygen?

1 \(11.2 \mathrm{~L}\)
2 \(22.4 \mathrm{~L}\)
3 \(2.24 \mathrm{~L}\)
4 \(1.12 \mathrm{~L}\)
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307008 The amount of arsenic pentasulphide that can be obtained when 35.5 g arsenic acid is treated with excess \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) in the presence of conc. HCl (assuming 100% conversion) is:

1 0.25 mol
2 0.50 mol
3 0.333 mol
4 0.125 mol
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307009 Which of the following statements is correct about the reaction given below?
\({\rm{4Fe(s) + 3}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(g)}}\)

1 Total mass of iron and oxygen in reactants = total mass of iron and oxygen on product therefore it follows law of conservation of mass.
2 Total mass of reactants = total massof product; therefore, law of multiple proportions is followed.
3 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) can be increased by taking any one of the reactants (iron or oxygen) in excess.
4 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307010 n g of a substance X reacts with m g of substance Y to form p g of substance R and q g of substance S.
This reaction can be represented as follow : \({\rm{X + Y = R + S}}\)
The relation which can be established in the amounts of the reactants and the products will be

1 n – m = p – q
2 n + m = p + q
3 n = m
4 p = q
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307011 Liquid benzene burns in oxygen according to following equation
\({\rm{2}}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}{\rm{ + 15}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{12C}}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 6}}{{\rm{H}}_{\rm{2}}}{\rm{O(g)}}\)
How many litres of oxygen are required for complete combustion of 39 g of liquid benzene?

1 11.2
2 22.4
3 42
4 84
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307012 What volume of \(\mathrm{CO}_{2}\) will be liberated at \(\mathrm{NTP}\), if \(12 \mathrm{~g}\) of carbon is burnt in excess of oxygen?

1 \(11.2 \mathrm{~L}\)
2 \(22.4 \mathrm{~L}\)
3 \(2.24 \mathrm{~L}\)
4 \(1.12 \mathrm{~L}\)
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307008 The amount of arsenic pentasulphide that can be obtained when 35.5 g arsenic acid is treated with excess \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) in the presence of conc. HCl (assuming 100% conversion) is:

1 0.25 mol
2 0.50 mol
3 0.333 mol
4 0.125 mol
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307009 Which of the following statements is correct about the reaction given below?
\({\rm{4Fe(s) + 3}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(g)}}\)

1 Total mass of iron and oxygen in reactants = total mass of iron and oxygen on product therefore it follows law of conservation of mass.
2 Total mass of reactants = total massof product; therefore, law of multiple proportions is followed.
3 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) can be increased by taking any one of the reactants (iron or oxygen) in excess.
4 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307010 n g of a substance X reacts with m g of substance Y to form p g of substance R and q g of substance S.
This reaction can be represented as follow : \({\rm{X + Y = R + S}}\)
The relation which can be established in the amounts of the reactants and the products will be

1 n – m = p – q
2 n + m = p + q
3 n = m
4 p = q
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307011 Liquid benzene burns in oxygen according to following equation
\({\rm{2}}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}{\rm{ + 15}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{12C}}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 6}}{{\rm{H}}_{\rm{2}}}{\rm{O(g)}}\)
How many litres of oxygen are required for complete combustion of 39 g of liquid benzene?

1 11.2
2 22.4
3 42
4 84
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307012 What volume of \(\mathrm{CO}_{2}\) will be liberated at \(\mathrm{NTP}\), if \(12 \mathrm{~g}\) of carbon is burnt in excess of oxygen?

1 \(11.2 \mathrm{~L}\)
2 \(22.4 \mathrm{~L}\)
3 \(2.24 \mathrm{~L}\)
4 \(1.12 \mathrm{~L}\)
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307008 The amount of arsenic pentasulphide that can be obtained when 35.5 g arsenic acid is treated with excess \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) in the presence of conc. HCl (assuming 100% conversion) is:

1 0.25 mol
2 0.50 mol
3 0.333 mol
4 0.125 mol
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307009 Which of the following statements is correct about the reaction given below?
\({\rm{4Fe(s) + 3}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(g)}}\)

1 Total mass of iron and oxygen in reactants = total mass of iron and oxygen on product therefore it follows law of conservation of mass.
2 Total mass of reactants = total massof product; therefore, law of multiple proportions is followed.
3 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) can be increased by taking any one of the reactants (iron or oxygen) in excess.
4 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307010 n g of a substance X reacts with m g of substance Y to form p g of substance R and q g of substance S.
This reaction can be represented as follow : \({\rm{X + Y = R + S}}\)
The relation which can be established in the amounts of the reactants and the products will be

1 n – m = p – q
2 n + m = p + q
3 n = m
4 p = q
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307011 Liquid benzene burns in oxygen according to following equation
\({\rm{2}}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}{\rm{ + 15}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{12C}}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 6}}{{\rm{H}}_{\rm{2}}}{\rm{O(g)}}\)
How many litres of oxygen are required for complete combustion of 39 g of liquid benzene?

1 11.2
2 22.4
3 42
4 84
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307012 What volume of \(\mathrm{CO}_{2}\) will be liberated at \(\mathrm{NTP}\), if \(12 \mathrm{~g}\) of carbon is burnt in excess of oxygen?

1 \(11.2 \mathrm{~L}\)
2 \(22.4 \mathrm{~L}\)
3 \(2.24 \mathrm{~L}\)
4 \(1.12 \mathrm{~L}\)
Join With Us for More Updates
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307008 The amount of arsenic pentasulphide that can be obtained when 35.5 g arsenic acid is treated with excess \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) in the presence of conc. HCl (assuming 100% conversion) is:

1 0.25 mol
2 0.50 mol
3 0.333 mol
4 0.125 mol
JEE - 2016
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307009 Which of the following statements is correct about the reaction given below?
\({\rm{4Fe(s) + 3}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(g)}}\)

1 Total mass of iron and oxygen in reactants = total mass of iron and oxygen on product therefore it follows law of conservation of mass.
2 Total mass of reactants = total massof product; therefore, law of multiple proportions is followed.
3 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) can be increased by taking any one of the reactants (iron or oxygen) in excess.
4 Amount of \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\) produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307010 n g of a substance X reacts with m g of substance Y to form p g of substance R and q g of substance S.
This reaction can be represented as follow : \({\rm{X + Y = R + S}}\)
The relation which can be established in the amounts of the reactants and the products will be

1 n – m = p – q
2 n + m = p + q
3 n = m
4 p = q
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307011 Liquid benzene burns in oxygen according to following equation
\({\rm{2}}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{6}}}{\rm{ + 15}}{{\rm{O}}_{\rm{2}}}{\rm{(g)}} \to {\rm{12C}}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 6}}{{\rm{H}}_{\rm{2}}}{\rm{O(g)}}\)
How many litres of oxygen are required for complete combustion of 39 g of liquid benzene?

1 11.2
2 22.4
3 42
4 84
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307012 What volume of \(\mathrm{CO}_{2}\) will be liberated at \(\mathrm{NTP}\), if \(12 \mathrm{~g}\) of carbon is burnt in excess of oxygen?

1 \(11.2 \mathrm{~L}\)
2 \(22.4 \mathrm{~L}\)
3 \(2.24 \mathrm{~L}\)
4 \(1.12 \mathrm{~L}\)