01. SOME BASIC CONCEPTS OF CHEMISTRY
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Some Basic Concepts of Chemistry

185938 Which of the following represents \(180\, g\) of water correctly ?

1 \(5\, moles\) of water
2 \(1\, mole\) of water
3 \(6.023 \times 10^{23}\) molecules of water
4 \(6.023 \times 10^{24}\) molecules of water
Some Basic Concepts of Chemistry

186133 \(510\) milli \(gm\) of a liquid on vapourisation in Victor Mayer's apparatus displaces \(510\, C.C.\) of dry air (at \(NTP)\). The molecular weight of liquid is

1 \(0.224\)
2 \(2.24\)
3 \(224\)
4 \(22.4\)
Some Basic Concepts of Chemistry

186134 The empirical formula of a compound is \(CH\). Its molecular weight is \(78\). The molecular formula of the compound will be

1 \(C_2H_2\)
2 \(C_3H_3\)
3 \(C_4H_4\)
4 \(C_6H_6\)
Some Basic Concepts of Chemistry

186135 Which of the following pairs of substances illustrates the law of multiple proportions?

1 \(CO\) and \(CO_2\)
2 \(NaCl\) and \(NaBr\)
3 \(H_2O\) and \(D_2O\)
4 \(MgO\) and \(Mg(OH)_2\)
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Some Basic Concepts of Chemistry

185938 Which of the following represents \(180\, g\) of water correctly ?

1 \(5\, moles\) of water
2 \(1\, mole\) of water
3 \(6.023 \times 10^{23}\) molecules of water
4 \(6.023 \times 10^{24}\) molecules of water
Some Basic Concepts of Chemistry

186133 \(510\) milli \(gm\) of a liquid on vapourisation in Victor Mayer's apparatus displaces \(510\, C.C.\) of dry air (at \(NTP)\). The molecular weight of liquid is

1 \(0.224\)
2 \(2.24\)
3 \(224\)
4 \(22.4\)
Some Basic Concepts of Chemistry

186134 The empirical formula of a compound is \(CH\). Its molecular weight is \(78\). The molecular formula of the compound will be

1 \(C_2H_2\)
2 \(C_3H_3\)
3 \(C_4H_4\)
4 \(C_6H_6\)
Some Basic Concepts of Chemistry

186135 Which of the following pairs of substances illustrates the law of multiple proportions?

1 \(CO\) and \(CO_2\)
2 \(NaCl\) and \(NaBr\)
3 \(H_2O\) and \(D_2O\)
4 \(MgO\) and \(Mg(OH)_2\)
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Some Basic Concepts of Chemistry

185938 Which of the following represents \(180\, g\) of water correctly ?

1 \(5\, moles\) of water
2 \(1\, mole\) of water
3 \(6.023 \times 10^{23}\) molecules of water
4 \(6.023 \times 10^{24}\) molecules of water
Some Basic Concepts of Chemistry

186133 \(510\) milli \(gm\) of a liquid on vapourisation in Victor Mayer's apparatus displaces \(510\, C.C.\) of dry air (at \(NTP)\). The molecular weight of liquid is

1 \(0.224\)
2 \(2.24\)
3 \(224\)
4 \(22.4\)
Some Basic Concepts of Chemistry

186134 The empirical formula of a compound is \(CH\). Its molecular weight is \(78\). The molecular formula of the compound will be

1 \(C_2H_2\)
2 \(C_3H_3\)
3 \(C_4H_4\)
4 \(C_6H_6\)
Some Basic Concepts of Chemistry

186135 Which of the following pairs of substances illustrates the law of multiple proportions?

1 \(CO\) and \(CO_2\)
2 \(NaCl\) and \(NaBr\)
3 \(H_2O\) and \(D_2O\)
4 \(MgO\) and \(Mg(OH)_2\)
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Some Basic Concepts of Chemistry

185938 Which of the following represents \(180\, g\) of water correctly ?

1 \(5\, moles\) of water
2 \(1\, mole\) of water
3 \(6.023 \times 10^{23}\) molecules of water
4 \(6.023 \times 10^{24}\) molecules of water
Some Basic Concepts of Chemistry

186133 \(510\) milli \(gm\) of a liquid on vapourisation in Victor Mayer's apparatus displaces \(510\, C.C.\) of dry air (at \(NTP)\). The molecular weight of liquid is

1 \(0.224\)
2 \(2.24\)
3 \(224\)
4 \(22.4\)
Some Basic Concepts of Chemistry

186134 The empirical formula of a compound is \(CH\). Its molecular weight is \(78\). The molecular formula of the compound will be

1 \(C_2H_2\)
2 \(C_3H_3\)
3 \(C_4H_4\)
4 \(C_6H_6\)
Some Basic Concepts of Chemistry

186135 Which of the following pairs of substances illustrates the law of multiple proportions?

1 \(CO\) and \(CO_2\)
2 \(NaCl\) and \(NaBr\)
3 \(H_2O\) and \(D_2O\)
4 \(MgO\) and \(Mg(OH)_2\)
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