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

306735 80 g of oxygen contains as many atoms as in

1 10 g of hydrogen
2 5 g of hydrogen
3 80 g of hydrogen
4 1 g of hydrogen
KCET - 2008
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306737 Assertion :
\(1 \mathrm{~L}\) of \(\mathrm{O}_{2}\), and \(1 \mathrm{~L}\) of \(\mathrm{O}_{3}\) contain the same number of moles under identical conditions.
Reason :
Under identical conditions, \(1 \mathrm{~L}\) of \(\mathrm{O}_{2}\) ,gas and \(1 \mathrm{~L}\) of \(\mathrm{O}_{3}\) gas contain the same number of oxygen atoms.

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

306738 Assuming the human body to be \(80 \%\) of water, the number of molecules of water present in the body of a person, of mass 65 kg , are

1 \(1.73 \times 10^{16}\)
2 \(17.39 \times 10^{26}\)
3 \(173.9 \times 10^{28}\)
4 \(1.739 \times 10^{51}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306739 In which of the following pairs do 1 g of each have an equal number of molecules?

1 \(\mathrm{N}_{2} \mathrm{O}\) and CO
2 \(\mathrm{N}_{2}\) and \(\mathrm{C}_{3} \mathrm{O}_{2}\)
3 \(\mathrm{N}_{2}\) and CO
4 \(\mathrm{N}_{2}\) and \(\mathrm{CO}_{2}\)
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306735 80 g of oxygen contains as many atoms as in

1 10 g of hydrogen
2 5 g of hydrogen
3 80 g of hydrogen
4 1 g of hydrogen
KCET - 2008
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306737 Assertion :
\(1 \mathrm{~L}\) of \(\mathrm{O}_{2}\), and \(1 \mathrm{~L}\) of \(\mathrm{O}_{3}\) contain the same number of moles under identical conditions.
Reason :
Under identical conditions, \(1 \mathrm{~L}\) of \(\mathrm{O}_{2}\) ,gas and \(1 \mathrm{~L}\) of \(\mathrm{O}_{3}\) gas contain the same number of oxygen atoms.

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

306738 Assuming the human body to be \(80 \%\) of water, the number of molecules of water present in the body of a person, of mass 65 kg , are

1 \(1.73 \times 10^{16}\)
2 \(17.39 \times 10^{26}\)
3 \(173.9 \times 10^{28}\)
4 \(1.739 \times 10^{51}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306739 In which of the following pairs do 1 g of each have an equal number of molecules?

1 \(\mathrm{N}_{2} \mathrm{O}\) and CO
2 \(\mathrm{N}_{2}\) and \(\mathrm{C}_{3} \mathrm{O}_{2}\)
3 \(\mathrm{N}_{2}\) and CO
4 \(\mathrm{N}_{2}\) and \(\mathrm{CO}_{2}\)
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306735 80 g of oxygen contains as many atoms as in

1 10 g of hydrogen
2 5 g of hydrogen
3 80 g of hydrogen
4 1 g of hydrogen
KCET - 2008
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306737 Assertion :
\(1 \mathrm{~L}\) of \(\mathrm{O}_{2}\), and \(1 \mathrm{~L}\) of \(\mathrm{O}_{3}\) contain the same number of moles under identical conditions.
Reason :
Under identical conditions, \(1 \mathrm{~L}\) of \(\mathrm{O}_{2}\) ,gas and \(1 \mathrm{~L}\) of \(\mathrm{O}_{3}\) gas contain the same number of oxygen atoms.

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

306738 Assuming the human body to be \(80 \%\) of water, the number of molecules of water present in the body of a person, of mass 65 kg , are

1 \(1.73 \times 10^{16}\)
2 \(17.39 \times 10^{26}\)
3 \(173.9 \times 10^{28}\)
4 \(1.739 \times 10^{51}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306739 In which of the following pairs do 1 g of each have an equal number of molecules?

1 \(\mathrm{N}_{2} \mathrm{O}\) and CO
2 \(\mathrm{N}_{2}\) and \(\mathrm{C}_{3} \mathrm{O}_{2}\)
3 \(\mathrm{N}_{2}\) and CO
4 \(\mathrm{N}_{2}\) and \(\mathrm{CO}_{2}\)
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306735 80 g of oxygen contains as many atoms as in

1 10 g of hydrogen
2 5 g of hydrogen
3 80 g of hydrogen
4 1 g of hydrogen
KCET - 2008
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306737 Assertion :
\(1 \mathrm{~L}\) of \(\mathrm{O}_{2}\), and \(1 \mathrm{~L}\) of \(\mathrm{O}_{3}\) contain the same number of moles under identical conditions.
Reason :
Under identical conditions, \(1 \mathrm{~L}\) of \(\mathrm{O}_{2}\) ,gas and \(1 \mathrm{~L}\) of \(\mathrm{O}_{3}\) gas contain the same number of oxygen atoms.

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

306738 Assuming the human body to be \(80 \%\) of water, the number of molecules of water present in the body of a person, of mass 65 kg , are

1 \(1.73 \times 10^{16}\)
2 \(17.39 \times 10^{26}\)
3 \(173.9 \times 10^{28}\)
4 \(1.739 \times 10^{51}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306739 In which of the following pairs do 1 g of each have an equal number of molecules?

1 \(\mathrm{N}_{2} \mathrm{O}\) and CO
2 \(\mathrm{N}_{2}\) and \(\mathrm{C}_{3} \mathrm{O}_{2}\)
3 \(\mathrm{N}_{2}\) and CO
4 \(\mathrm{N}_{2}\) and \(\mathrm{CO}_{2}\)