Periodic Trends and Chemical Reactivity
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CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313102 The pair of amphoteric hydroxides is

1 \({\rm{Al}}\,{\left( {{\rm{OH}}} \right)_{\rm{3}}}{\rm{,}}\,{\rm{LiOH}}\)
2 \({\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}{\rm{,}}\,{\rm{Mg}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
3 \({\rm{B}}{\left( {{\rm{OH}}} \right)_{\rm{3}}}{\rm{,}}\,{\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
4 \({\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}{\rm{,}}\,{\rm{Zn}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313103 Aqueous solutions of two compounds \({\rm{M}}\,{\rm{ - }}\,{\rm{O}}\,{\rm{ - }}\,{\rm{H}}\,\,{\rm{and}}\,\,{{\rm{M}}^{\rm{'}}}\,{\rm{ - }}\,{\rm{O}}\,{\rm{ - }}\,{\rm{H}}\) have been prepared in two different beakers. If the electronegativity of \({\rm{M = 3}}{\rm{.5,}}\,\,{{\rm{M}}^{\rm{'}}}{\rm{ = 1}}{\rm{.72,}}\,\,{\rm{O = 3}}{\rm{.0}}\,\,{\rm{and}}\,\,{\rm{H = 2}}{\rm{.1,}}\) then the solutions respectively are

1 Acidic, acidic
2 Acidic, basic
3 Basic, basic
4 Basic, acidic
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313104 Solutions of equal strength of XOH and QOH are prepared. The I.E.’s of X and Q are 5.1 and 13.0 eV respectively, whereas their E.N’s are 0.9 and 3.2 respectively. Using the information, spot the incorrect conclusion :

1 Reaction of XOH and \({\rm{N}}{{\rm{H}}_{\rm{4}}}{\rm{Cl}}\) will produce \({\rm{N}}{{\rm{H}}_{\rm{3}}}{\rm{.}}\)
2 Solution of QOH will give effervescence with \({\rm{NaHC}}{{\rm{O}}_{\rm{3}}}{\rm{.}}\)
3 Phenolphthalein will give pink colour with XOH solutions.
4 The pH of QOH solution will be more than 7.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313105 The order of stability of metal oxides is

1 \({\rm{C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
2 \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO}}\)
3 \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO}}\)
4 \({\rm{A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO < F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
KCET - 2009
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CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313102 The pair of amphoteric hydroxides is

1 \({\rm{Al}}\,{\left( {{\rm{OH}}} \right)_{\rm{3}}}{\rm{,}}\,{\rm{LiOH}}\)
2 \({\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}{\rm{,}}\,{\rm{Mg}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
3 \({\rm{B}}{\left( {{\rm{OH}}} \right)_{\rm{3}}}{\rm{,}}\,{\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
4 \({\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}{\rm{,}}\,{\rm{Zn}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313103 Aqueous solutions of two compounds \({\rm{M}}\,{\rm{ - }}\,{\rm{O}}\,{\rm{ - }}\,{\rm{H}}\,\,{\rm{and}}\,\,{{\rm{M}}^{\rm{'}}}\,{\rm{ - }}\,{\rm{O}}\,{\rm{ - }}\,{\rm{H}}\) have been prepared in two different beakers. If the electronegativity of \({\rm{M = 3}}{\rm{.5,}}\,\,{{\rm{M}}^{\rm{'}}}{\rm{ = 1}}{\rm{.72,}}\,\,{\rm{O = 3}}{\rm{.0}}\,\,{\rm{and}}\,\,{\rm{H = 2}}{\rm{.1,}}\) then the solutions respectively are

1 Acidic, acidic
2 Acidic, basic
3 Basic, basic
4 Basic, acidic
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313104 Solutions of equal strength of XOH and QOH are prepared. The I.E.’s of X and Q are 5.1 and 13.0 eV respectively, whereas their E.N’s are 0.9 and 3.2 respectively. Using the information, spot the incorrect conclusion :

1 Reaction of XOH and \({\rm{N}}{{\rm{H}}_{\rm{4}}}{\rm{Cl}}\) will produce \({\rm{N}}{{\rm{H}}_{\rm{3}}}{\rm{.}}\)
2 Solution of QOH will give effervescence with \({\rm{NaHC}}{{\rm{O}}_{\rm{3}}}{\rm{.}}\)
3 Phenolphthalein will give pink colour with XOH solutions.
4 The pH of QOH solution will be more than 7.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313105 The order of stability of metal oxides is

1 \({\rm{C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
2 \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO}}\)
3 \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO}}\)
4 \({\rm{A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO < F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
KCET - 2009
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CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313102 The pair of amphoteric hydroxides is

1 \({\rm{Al}}\,{\left( {{\rm{OH}}} \right)_{\rm{3}}}{\rm{,}}\,{\rm{LiOH}}\)
2 \({\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}{\rm{,}}\,{\rm{Mg}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
3 \({\rm{B}}{\left( {{\rm{OH}}} \right)_{\rm{3}}}{\rm{,}}\,{\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
4 \({\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}{\rm{,}}\,{\rm{Zn}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313103 Aqueous solutions of two compounds \({\rm{M}}\,{\rm{ - }}\,{\rm{O}}\,{\rm{ - }}\,{\rm{H}}\,\,{\rm{and}}\,\,{{\rm{M}}^{\rm{'}}}\,{\rm{ - }}\,{\rm{O}}\,{\rm{ - }}\,{\rm{H}}\) have been prepared in two different beakers. If the electronegativity of \({\rm{M = 3}}{\rm{.5,}}\,\,{{\rm{M}}^{\rm{'}}}{\rm{ = 1}}{\rm{.72,}}\,\,{\rm{O = 3}}{\rm{.0}}\,\,{\rm{and}}\,\,{\rm{H = 2}}{\rm{.1,}}\) then the solutions respectively are

1 Acidic, acidic
2 Acidic, basic
3 Basic, basic
4 Basic, acidic
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313104 Solutions of equal strength of XOH and QOH are prepared. The I.E.’s of X and Q are 5.1 and 13.0 eV respectively, whereas their E.N’s are 0.9 and 3.2 respectively. Using the information, spot the incorrect conclusion :

1 Reaction of XOH and \({\rm{N}}{{\rm{H}}_{\rm{4}}}{\rm{Cl}}\) will produce \({\rm{N}}{{\rm{H}}_{\rm{3}}}{\rm{.}}\)
2 Solution of QOH will give effervescence with \({\rm{NaHC}}{{\rm{O}}_{\rm{3}}}{\rm{.}}\)
3 Phenolphthalein will give pink colour with XOH solutions.
4 The pH of QOH solution will be more than 7.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313105 The order of stability of metal oxides is

1 \({\rm{C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
2 \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO}}\)
3 \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO}}\)
4 \({\rm{A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO < F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
KCET - 2009
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CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313102 The pair of amphoteric hydroxides is

1 \({\rm{Al}}\,{\left( {{\rm{OH}}} \right)_{\rm{3}}}{\rm{,}}\,{\rm{LiOH}}\)
2 \({\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}{\rm{,}}\,{\rm{Mg}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
3 \({\rm{B}}{\left( {{\rm{OH}}} \right)_{\rm{3}}}{\rm{,}}\,{\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
4 \({\rm{Be}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}{\rm{,}}\,{\rm{Zn}}{\left( {{\rm{OH}}} \right)_{\rm{2}}}\)
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313103 Aqueous solutions of two compounds \({\rm{M}}\,{\rm{ - }}\,{\rm{O}}\,{\rm{ - }}\,{\rm{H}}\,\,{\rm{and}}\,\,{{\rm{M}}^{\rm{'}}}\,{\rm{ - }}\,{\rm{O}}\,{\rm{ - }}\,{\rm{H}}\) have been prepared in two different beakers. If the electronegativity of \({\rm{M = 3}}{\rm{.5,}}\,\,{{\rm{M}}^{\rm{'}}}{\rm{ = 1}}{\rm{.72,}}\,\,{\rm{O = 3}}{\rm{.0}}\,\,{\rm{and}}\,\,{\rm{H = 2}}{\rm{.1,}}\) then the solutions respectively are

1 Acidic, acidic
2 Acidic, basic
3 Basic, basic
4 Basic, acidic
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313104 Solutions of equal strength of XOH and QOH are prepared. The I.E.’s of X and Q are 5.1 and 13.0 eV respectively, whereas their E.N’s are 0.9 and 3.2 respectively. Using the information, spot the incorrect conclusion :

1 Reaction of XOH and \({\rm{N}}{{\rm{H}}_{\rm{4}}}{\rm{Cl}}\) will produce \({\rm{N}}{{\rm{H}}_{\rm{3}}}{\rm{.}}\)
2 Solution of QOH will give effervescence with \({\rm{NaHC}}{{\rm{O}}_{\rm{3}}}{\rm{.}}\)
3 Phenolphthalein will give pink colour with XOH solutions.
4 The pH of QOH solution will be more than 7.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313105 The order of stability of metal oxides is

1 \({\rm{C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
2 \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO}}\)
3 \({\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO}}\)
4 \({\rm{A}}{{\rm{l}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < MgO < F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{ < C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}\)
KCET - 2009
NEET DIGITAL LIBRARY