315811
Which of the following is an amphoteric hydroxide?
1 \(\mathrm{Sr}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
3 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) amphoteric in nature, since it can react both with acid and base \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{HCl} \longrightarrow \mathrm{BeCl}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_{2} \mathrm{BeO}_{2}+2 \mathrm{H}_{2} \mathrm{O}\)
NEET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315812
Beryllium hydroxide dissolves in excess of alkali to give beryllate ion. How many Be atom(s) are present in one formula unit of the ion?
315813
Which of the following is an amphoteric oxide
1 \(\mathrm{CaO}\)
2 \(\mathrm{SrO}\)
3 \(\mathrm{BeO}\)
4 \(\mathrm{MgO}\)
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315814
Among the following hydroxides, the one which has the lowest value of \({{\rm{K}}_{{\rm{sp}}}}\) at ordinary temperature (about \(25^{\circ} \mathrm{C}\) ) is:
1 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ba}(\mathrm{OH})_{2}\)
3 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) is insoluble in water.
CHXI10:THE S-BLOCK ELEMENTS
315815
Metals form basic hydroxides. Which of the following metal hydroxides is the least basic?
315811
Which of the following is an amphoteric hydroxide?
1 \(\mathrm{Sr}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
3 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) amphoteric in nature, since it can react both with acid and base \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{HCl} \longrightarrow \mathrm{BeCl}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_{2} \mathrm{BeO}_{2}+2 \mathrm{H}_{2} \mathrm{O}\)
NEET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315812
Beryllium hydroxide dissolves in excess of alkali to give beryllate ion. How many Be atom(s) are present in one formula unit of the ion?
315813
Which of the following is an amphoteric oxide
1 \(\mathrm{CaO}\)
2 \(\mathrm{SrO}\)
3 \(\mathrm{BeO}\)
4 \(\mathrm{MgO}\)
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315814
Among the following hydroxides, the one which has the lowest value of \({{\rm{K}}_{{\rm{sp}}}}\) at ordinary temperature (about \(25^{\circ} \mathrm{C}\) ) is:
1 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ba}(\mathrm{OH})_{2}\)
3 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) is insoluble in water.
CHXI10:THE S-BLOCK ELEMENTS
315815
Metals form basic hydroxides. Which of the following metal hydroxides is the least basic?
315811
Which of the following is an amphoteric hydroxide?
1 \(\mathrm{Sr}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
3 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) amphoteric in nature, since it can react both with acid and base \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{HCl} \longrightarrow \mathrm{BeCl}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_{2} \mathrm{BeO}_{2}+2 \mathrm{H}_{2} \mathrm{O}\)
NEET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315812
Beryllium hydroxide dissolves in excess of alkali to give beryllate ion. How many Be atom(s) are present in one formula unit of the ion?
315813
Which of the following is an amphoteric oxide
1 \(\mathrm{CaO}\)
2 \(\mathrm{SrO}\)
3 \(\mathrm{BeO}\)
4 \(\mathrm{MgO}\)
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315814
Among the following hydroxides, the one which has the lowest value of \({{\rm{K}}_{{\rm{sp}}}}\) at ordinary temperature (about \(25^{\circ} \mathrm{C}\) ) is:
1 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ba}(\mathrm{OH})_{2}\)
3 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) is insoluble in water.
CHXI10:THE S-BLOCK ELEMENTS
315815
Metals form basic hydroxides. Which of the following metal hydroxides is the least basic?
315811
Which of the following is an amphoteric hydroxide?
1 \(\mathrm{Sr}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
3 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) amphoteric in nature, since it can react both with acid and base \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{HCl} \longrightarrow \mathrm{BeCl}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_{2} \mathrm{BeO}_{2}+2 \mathrm{H}_{2} \mathrm{O}\)
NEET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315812
Beryllium hydroxide dissolves in excess of alkali to give beryllate ion. How many Be atom(s) are present in one formula unit of the ion?
315813
Which of the following is an amphoteric oxide
1 \(\mathrm{CaO}\)
2 \(\mathrm{SrO}\)
3 \(\mathrm{BeO}\)
4 \(\mathrm{MgO}\)
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315814
Among the following hydroxides, the one which has the lowest value of \({{\rm{K}}_{{\rm{sp}}}}\) at ordinary temperature (about \(25^{\circ} \mathrm{C}\) ) is:
1 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ba}(\mathrm{OH})_{2}\)
3 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) is insoluble in water.
CHXI10:THE S-BLOCK ELEMENTS
315815
Metals form basic hydroxides. Which of the following metal hydroxides is the least basic?
315811
Which of the following is an amphoteric hydroxide?
1 \(\mathrm{Sr}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
3 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) amphoteric in nature, since it can react both with acid and base \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{HCl} \longrightarrow \mathrm{BeCl}_{2}+2 \mathrm{H}_{2} \mathrm{O}\) \(\mathrm{Be}(\mathrm{OH})_{2}+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_{2} \mathrm{BeO}_{2}+2 \mathrm{H}_{2} \mathrm{O}\)
NEET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315812
Beryllium hydroxide dissolves in excess of alkali to give beryllate ion. How many Be atom(s) are present in one formula unit of the ion?
315813
Which of the following is an amphoteric oxide
1 \(\mathrm{CaO}\)
2 \(\mathrm{SrO}\)
3 \(\mathrm{BeO}\)
4 \(\mathrm{MgO}\)
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315814
Among the following hydroxides, the one which has the lowest value of \({{\rm{K}}_{{\rm{sp}}}}\) at ordinary temperature (about \(25^{\circ} \mathrm{C}\) ) is:
1 \(\mathrm{Mg}(\mathrm{OH})_{2}\)
2 \(\mathrm{Ba}(\mathrm{OH})_{2}\)
3 \(\mathrm{Ca}(\mathrm{OH})_{2}\)
4 \(\mathrm{Be}(\mathrm{OH})_{2}\)
Explanation:
\(\mathrm{Be}(\mathrm{OH})_{2}\) is insoluble in water.
CHXI10:THE S-BLOCK ELEMENTS
315815
Metals form basic hydroxides. Which of the following metal hydroxides is the least basic?
