Mole Concept and Molar Mass
« Previous Topic: Laws of Chemical Combinations Next Topic: Nature of Matter »
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306744 \(\mathrm{\mathrm{xL}}\) of \(\mathrm{\mathrm{N}_{2}}\) at S.T.P. contains \(\mathrm{3 \times 10^{22}}\) molecules. The number of molecules in \(\mathrm{\mathrm{x} / 2 \mathrm{~L}}\) of ozone at S.T.P. will be

1 \(\mathrm{3 \times 10^{22}}\)
2 \(\mathrm{1.5 \times 10^{22}}\)
3 \(\mathrm{1.5 \times 10^{21}}\)
4 \(\mathrm{1.5 \times 10^{11}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306754 The following substances are present in different containers
(i) one gram atom of nitrogen
(ii) one mole of calcium
(iii) One atom of silver
(iv) One mole of oxygen molecules
(v) \(\mathrm{10^{23}}\) atoms of carbon
(vi) One gram of iron
The correct order of increasing masses (in grams) is/are

1 (iii) \(\mathrm{ < }\) (iv) \(\mathrm{ < }\) (i) \(\mathrm{ < }\) (v)
2 (iii) \(\mathrm{ < }\) (vi) \(\mathrm{ < }\) (iv) \(\mathrm{ < }\) (ii)
3 (vi) \(\mathrm{ < }\) (v) \(\mathrm{ < }\) (i) \(\mathrm{ < }\) (iv)
4 (2) & (3) both are correct
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306745 Volume occupied by one molecule of water \(\left( {{\rm{density}}{\mkern 1mu} {\mkern 1mu} {\rm{ = }}{\mkern 1mu} {\mkern 1mu} {\rm{1g}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{{\rm{ - 3}}}}} \right)\) is

1 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
2 \({\rm{3}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
3 \({\rm{5}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
4 \({\rm{9}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306746 The number of oxygen atoms in 4.4 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\) is

1 \({\rm{1}}{\rm{.2 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
2 \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{22}}}}\)
3 \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
4 \({\rm{12 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
KCET - 2016
For More Updates join with Us
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306744 \(\mathrm{\mathrm{xL}}\) of \(\mathrm{\mathrm{N}_{2}}\) at S.T.P. contains \(\mathrm{3 \times 10^{22}}\) molecules. The number of molecules in \(\mathrm{\mathrm{x} / 2 \mathrm{~L}}\) of ozone at S.T.P. will be

1 \(\mathrm{3 \times 10^{22}}\)
2 \(\mathrm{1.5 \times 10^{22}}\)
3 \(\mathrm{1.5 \times 10^{21}}\)
4 \(\mathrm{1.5 \times 10^{11}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306754 The following substances are present in different containers
(i) one gram atom of nitrogen
(ii) one mole of calcium
(iii) One atom of silver
(iv) One mole of oxygen molecules
(v) \(\mathrm{10^{23}}\) atoms of carbon
(vi) One gram of iron
The correct order of increasing masses (in grams) is/are

1 (iii) \(\mathrm{ < }\) (iv) \(\mathrm{ < }\) (i) \(\mathrm{ < }\) (v)
2 (iii) \(\mathrm{ < }\) (vi) \(\mathrm{ < }\) (iv) \(\mathrm{ < }\) (ii)
3 (vi) \(\mathrm{ < }\) (v) \(\mathrm{ < }\) (i) \(\mathrm{ < }\) (iv)
4 (2) & (3) both are correct
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306745 Volume occupied by one molecule of water \(\left( {{\rm{density}}{\mkern 1mu} {\mkern 1mu} {\rm{ = }}{\mkern 1mu} {\mkern 1mu} {\rm{1g}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{{\rm{ - 3}}}}} \right)\) is

1 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
2 \({\rm{3}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
3 \({\rm{5}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
4 \({\rm{9}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306746 The number of oxygen atoms in 4.4 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\) is

1 \({\rm{1}}{\rm{.2 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
2 \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{22}}}}\)
3 \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
4 \({\rm{12 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
KCET - 2016
NEET DIGITAL LIBRARY
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306744 \(\mathrm{\mathrm{xL}}\) of \(\mathrm{\mathrm{N}_{2}}\) at S.T.P. contains \(\mathrm{3 \times 10^{22}}\) molecules. The number of molecules in \(\mathrm{\mathrm{x} / 2 \mathrm{~L}}\) of ozone at S.T.P. will be

1 \(\mathrm{3 \times 10^{22}}\)
2 \(\mathrm{1.5 \times 10^{22}}\)
3 \(\mathrm{1.5 \times 10^{21}}\)
4 \(\mathrm{1.5 \times 10^{11}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306754 The following substances are present in different containers
(i) one gram atom of nitrogen
(ii) one mole of calcium
(iii) One atom of silver
(iv) One mole of oxygen molecules
(v) \(\mathrm{10^{23}}\) atoms of carbon
(vi) One gram of iron
The correct order of increasing masses (in grams) is/are

1 (iii) \(\mathrm{ < }\) (iv) \(\mathrm{ < }\) (i) \(\mathrm{ < }\) (v)
2 (iii) \(\mathrm{ < }\) (vi) \(\mathrm{ < }\) (iv) \(\mathrm{ < }\) (ii)
3 (vi) \(\mathrm{ < }\) (v) \(\mathrm{ < }\) (i) \(\mathrm{ < }\) (iv)
4 (2) & (3) both are correct
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306745 Volume occupied by one molecule of water \(\left( {{\rm{density}}{\mkern 1mu} {\mkern 1mu} {\rm{ = }}{\mkern 1mu} {\mkern 1mu} {\rm{1g}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{{\rm{ - 3}}}}} \right)\) is

1 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
2 \({\rm{3}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
3 \({\rm{5}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
4 \({\rm{9}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306746 The number of oxygen atoms in 4.4 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\) is

1 \({\rm{1}}{\rm{.2 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
2 \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{22}}}}\)
3 \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
4 \({\rm{12 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
KCET - 2016
Join With Us for More Updates
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306744 \(\mathrm{\mathrm{xL}}\) of \(\mathrm{\mathrm{N}_{2}}\) at S.T.P. contains \(\mathrm{3 \times 10^{22}}\) molecules. The number of molecules in \(\mathrm{\mathrm{x} / 2 \mathrm{~L}}\) of ozone at S.T.P. will be

1 \(\mathrm{3 \times 10^{22}}\)
2 \(\mathrm{1.5 \times 10^{22}}\)
3 \(\mathrm{1.5 \times 10^{21}}\)
4 \(\mathrm{1.5 \times 10^{11}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306754 The following substances are present in different containers
(i) one gram atom of nitrogen
(ii) one mole of calcium
(iii) One atom of silver
(iv) One mole of oxygen molecules
(v) \(\mathrm{10^{23}}\) atoms of carbon
(vi) One gram of iron
The correct order of increasing masses (in grams) is/are

1 (iii) \(\mathrm{ < }\) (iv) \(\mathrm{ < }\) (i) \(\mathrm{ < }\) (v)
2 (iii) \(\mathrm{ < }\) (vi) \(\mathrm{ < }\) (iv) \(\mathrm{ < }\) (ii)
3 (vi) \(\mathrm{ < }\) (v) \(\mathrm{ < }\) (i) \(\mathrm{ < }\) (iv)
4 (2) & (3) both are correct
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306745 Volume occupied by one molecule of water \(\left( {{\rm{density}}{\mkern 1mu} {\mkern 1mu} {\rm{ = }}{\mkern 1mu} {\mkern 1mu} {\rm{1g}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{{\rm{ - 3}}}}} \right)\) is

1 \({\rm{6}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
2 \({\rm{3}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
3 \({\rm{5}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
4 \({\rm{9}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 23}}}}{\rm{c}}{{\rm{m}}^{\rm{3}}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306746 The number of oxygen atoms in 4.4 g of \({\rm{C}}{{\rm{O}}_{\rm{2}}}\) is

1 \({\rm{1}}{\rm{.2 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
2 \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{22}}}}\)
3 \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
4 \({\rm{12 \times 1}}{{\rm{0}}^{{\rm{23}}}}\)
KCET - 2016
For More Updates join with Us