Laws of Chemical Combinations
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306661 In an experiment, \({\rm{5}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaC}}{{\rm{O}}_{\rm{3}}}\) on heating gave \({\rm{2}}{\rm{.8}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaO}}\) and \({\rm{2}}{\rm{.2}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{C}}{{\rm{O}}_{\rm{2}}}\). The results are in accordance with the

1 Law of conservation of mass
2 Law of constant proportion
3 Law of multiple proportion
4 Law of reciprocal proportion
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306662 "Mass can neither be created nor destroyed" is the statement of

1 Gay Lussac Law of gaseous volume
2 Law of definite proportions
3 Law of conservation of mass
4 Law of multiple porportions
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306663 Assertion :
In \(\mathrm{CO}\) molecule, 12 parts by mass of carbon combine with 16 parts by mass of oxygen and in \(\mathrm{CO}_{2}\), 12 parts by mass of carbon combine with 32 parts by mass of oxygen.
Reason :
When two elements combine separately with a fixed mass of a third element,then the ratio of their masses in which they do so is either the same or whole number multiple of the ratio in which they combine with each other

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306664 If law of conservation of mass was to hold true, then \(\mathrm{20.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{BaCl}_{2}}\) on reaction with \(\mathrm{9.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) will produce \(\mathrm{7.3 \mathrm{~g}}\) of \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{BaSO}_{4}}\) equal to

1 \(\mathrm{11.65 \mathrm{~g}}\)
2 \(\mathrm{23.3 \mathrm{~g}}\)
3 \(\mathrm{25.5 \mathrm{~g}}\)
4 \(\mathrm{30.6 \mathrm{~g}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306665 Which of the following statements best explains the law of conservation of mass?

1 100 g water is heated to give steam.
2 A sample of \({{\rm{N}}_{\rm{2}}}\) gas is heated at constant pressure without any change in mass.
3 36 g of carbon combines with 32 g of oxygen to form 68 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\).
4 10 g of carbon is heated in vacuum without any change in mass.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306661 In an experiment, \({\rm{5}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaC}}{{\rm{O}}_{\rm{3}}}\) on heating gave \({\rm{2}}{\rm{.8}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaO}}\) and \({\rm{2}}{\rm{.2}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{C}}{{\rm{O}}_{\rm{2}}}\). The results are in accordance with the

1 Law of conservation of mass
2 Law of constant proportion
3 Law of multiple proportion
4 Law of reciprocal proportion
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306662 "Mass can neither be created nor destroyed" is the statement of

1 Gay Lussac Law of gaseous volume
2 Law of definite proportions
3 Law of conservation of mass
4 Law of multiple porportions
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306663 Assertion :
In \(\mathrm{CO}\) molecule, 12 parts by mass of carbon combine with 16 parts by mass of oxygen and in \(\mathrm{CO}_{2}\), 12 parts by mass of carbon combine with 32 parts by mass of oxygen.
Reason :
When two elements combine separately with a fixed mass of a third element,then the ratio of their masses in which they do so is either the same or whole number multiple of the ratio in which they combine with each other

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306664 If law of conservation of mass was to hold true, then \(\mathrm{20.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{BaCl}_{2}}\) on reaction with \(\mathrm{9.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) will produce \(\mathrm{7.3 \mathrm{~g}}\) of \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{BaSO}_{4}}\) equal to

1 \(\mathrm{11.65 \mathrm{~g}}\)
2 \(\mathrm{23.3 \mathrm{~g}}\)
3 \(\mathrm{25.5 \mathrm{~g}}\)
4 \(\mathrm{30.6 \mathrm{~g}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306665 Which of the following statements best explains the law of conservation of mass?

1 100 g water is heated to give steam.
2 A sample of \({{\rm{N}}_{\rm{2}}}\) gas is heated at constant pressure without any change in mass.
3 36 g of carbon combines with 32 g of oxygen to form 68 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\).
4 10 g of carbon is heated in vacuum without any change in mass.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306661 In an experiment, \({\rm{5}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaC}}{{\rm{O}}_{\rm{3}}}\) on heating gave \({\rm{2}}{\rm{.8}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaO}}\) and \({\rm{2}}{\rm{.2}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{C}}{{\rm{O}}_{\rm{2}}}\). The results are in accordance with the

1 Law of conservation of mass
2 Law of constant proportion
3 Law of multiple proportion
4 Law of reciprocal proportion
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306662 "Mass can neither be created nor destroyed" is the statement of

1 Gay Lussac Law of gaseous volume
2 Law of definite proportions
3 Law of conservation of mass
4 Law of multiple porportions
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306663 Assertion :
In \(\mathrm{CO}\) molecule, 12 parts by mass of carbon combine with 16 parts by mass of oxygen and in \(\mathrm{CO}_{2}\), 12 parts by mass of carbon combine with 32 parts by mass of oxygen.
Reason :
When two elements combine separately with a fixed mass of a third element,then the ratio of their masses in which they do so is either the same or whole number multiple of the ratio in which they combine with each other

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306664 If law of conservation of mass was to hold true, then \(\mathrm{20.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{BaCl}_{2}}\) on reaction with \(\mathrm{9.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) will produce \(\mathrm{7.3 \mathrm{~g}}\) of \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{BaSO}_{4}}\) equal to

1 \(\mathrm{11.65 \mathrm{~g}}\)
2 \(\mathrm{23.3 \mathrm{~g}}\)
3 \(\mathrm{25.5 \mathrm{~g}}\)
4 \(\mathrm{30.6 \mathrm{~g}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306665 Which of the following statements best explains the law of conservation of mass?

1 100 g water is heated to give steam.
2 A sample of \({{\rm{N}}_{\rm{2}}}\) gas is heated at constant pressure without any change in mass.
3 36 g of carbon combines with 32 g of oxygen to form 68 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\).
4 10 g of carbon is heated in vacuum without any change in mass.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306661 In an experiment, \({\rm{5}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaC}}{{\rm{O}}_{\rm{3}}}\) on heating gave \({\rm{2}}{\rm{.8}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaO}}\) and \({\rm{2}}{\rm{.2}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{C}}{{\rm{O}}_{\rm{2}}}\). The results are in accordance with the

1 Law of conservation of mass
2 Law of constant proportion
3 Law of multiple proportion
4 Law of reciprocal proportion
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306662 "Mass can neither be created nor destroyed" is the statement of

1 Gay Lussac Law of gaseous volume
2 Law of definite proportions
3 Law of conservation of mass
4 Law of multiple porportions
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306663 Assertion :
In \(\mathrm{CO}\) molecule, 12 parts by mass of carbon combine with 16 parts by mass of oxygen and in \(\mathrm{CO}_{2}\), 12 parts by mass of carbon combine with 32 parts by mass of oxygen.
Reason :
When two elements combine separately with a fixed mass of a third element,then the ratio of their masses in which they do so is either the same or whole number multiple of the ratio in which they combine with each other

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306664 If law of conservation of mass was to hold true, then \(\mathrm{20.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{BaCl}_{2}}\) on reaction with \(\mathrm{9.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) will produce \(\mathrm{7.3 \mathrm{~g}}\) of \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{BaSO}_{4}}\) equal to

1 \(\mathrm{11.65 \mathrm{~g}}\)
2 \(\mathrm{23.3 \mathrm{~g}}\)
3 \(\mathrm{25.5 \mathrm{~g}}\)
4 \(\mathrm{30.6 \mathrm{~g}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306665 Which of the following statements best explains the law of conservation of mass?

1 100 g water is heated to give steam.
2 A sample of \({{\rm{N}}_{\rm{2}}}\) gas is heated at constant pressure without any change in mass.
3 36 g of carbon combines with 32 g of oxygen to form 68 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\).
4 10 g of carbon is heated in vacuum without any change in mass.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306661 In an experiment, \({\rm{5}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaC}}{{\rm{O}}_{\rm{3}}}\) on heating gave \({\rm{2}}{\rm{.8}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{CaO}}\) and \({\rm{2}}{\rm{.2}}{\mkern 1mu} {\rm{g}}{\mkern 1mu} {\mkern 1mu} {\rm{of}}{\mkern 1mu} {\mkern 1mu} {\rm{C}}{{\rm{O}}_{\rm{2}}}\). The results are in accordance with the

1 Law of conservation of mass
2 Law of constant proportion
3 Law of multiple proportion
4 Law of reciprocal proportion
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306662 "Mass can neither be created nor destroyed" is the statement of

1 Gay Lussac Law of gaseous volume
2 Law of definite proportions
3 Law of conservation of mass
4 Law of multiple porportions
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306663 Assertion :
In \(\mathrm{CO}\) molecule, 12 parts by mass of carbon combine with 16 parts by mass of oxygen and in \(\mathrm{CO}_{2}\), 12 parts by mass of carbon combine with 32 parts by mass of oxygen.
Reason :
When two elements combine separately with a fixed mass of a third element,then the ratio of their masses in which they do so is either the same or whole number multiple of the ratio in which they combine with each other

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306664 If law of conservation of mass was to hold true, then \(\mathrm{20.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{BaCl}_{2}}\) on reaction with \(\mathrm{9.8 \mathrm{~g}}\) of \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) will produce \(\mathrm{7.3 \mathrm{~g}}\) of \(\mathrm{\mathrm{HCl}}\) and \(\mathrm{\mathrm{BaSO}_{4}}\) equal to

1 \(\mathrm{11.65 \mathrm{~g}}\)
2 \(\mathrm{23.3 \mathrm{~g}}\)
3 \(\mathrm{25.5 \mathrm{~g}}\)
4 \(\mathrm{30.6 \mathrm{~g}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306665 Which of the following statements best explains the law of conservation of mass?

1 100 g water is heated to give steam.
2 A sample of \({{\rm{N}}_{\rm{2}}}\) gas is heated at constant pressure without any change in mass.
3 36 g of carbon combines with 32 g of oxygen to form 68 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\).
4 10 g of carbon is heated in vacuum without any change in mass.