Feldspar is \(K _2 O _2 Al _2 O _3 \cdot 6 SiO _2\).
11. THE P-BLOCK ELEMENTS
189622
The most acidic of the following compounds is
1 \({P_2}{O_3}\)
2 \(S{b_2}{O_3}\)
3 \({B_2}{O_3}\)
4 \(A{s_2}{O_3}\)
Explanation:
It’s Obvious.
11. THE P-BLOCK ELEMENTS
189623
Identify the statement that is not correct as far as structure of diborane is concerned
1 There are two bridging hydrogen atoms in diborane
2 Each boron atom forms four bonds in diborane
3 The hydrogen atoms are not in the same plane in diborane
4 All \(B - H\) bonds in diborane are similar
Explanation:
(d) \({B_2}{H_6}\) has two types of \(B - H\) bonds
11. THE P-BLOCK ELEMENTS
189624
Soft heavy metal melts at \({30\,^o}C\) and is used in making heat sensitive thermometers the metal is
1 Galium
2 Sodium
3 Potassium
4 Caesium
Explanation:
Gallium is a silvery, glass-like, soft metal. Its properties are close to the nonmetals in the periodic table and its metallic properties are not as metallic as most other metals. Solid gallium is brittle and is a poorer electrical conductor than lead. Gallium has the second largest liquid range of any element and is one of the few metals that is liquid near room temperature (m.pt. \(29.76\)), melting in the hand. So it is used in thermometer.
11. THE P-BLOCK ELEMENTS
189625
Which of the following is formed when aluminium oxide and carbon is strongly heated in dry chlorine gas
1 Aluminium chloride
2 Hydrate aluminium chloride
3 Anhydrous aluminium chloride
4 None of these
Explanation:
When aluminum oxide and carbon are strongly heated in dry chlorine gas anhydrous aluminum chloride is formed.
Feldspar is \(K _2 O _2 Al _2 O _3 \cdot 6 SiO _2\).
11. THE P-BLOCK ELEMENTS
189622
The most acidic of the following compounds is
1 \({P_2}{O_3}\)
2 \(S{b_2}{O_3}\)
3 \({B_2}{O_3}\)
4 \(A{s_2}{O_3}\)
Explanation:
It’s Obvious.
11. THE P-BLOCK ELEMENTS
189623
Identify the statement that is not correct as far as structure of diborane is concerned
1 There are two bridging hydrogen atoms in diborane
2 Each boron atom forms four bonds in diborane
3 The hydrogen atoms are not in the same plane in diborane
4 All \(B - H\) bonds in diborane are similar
Explanation:
(d) \({B_2}{H_6}\) has two types of \(B - H\) bonds
11. THE P-BLOCK ELEMENTS
189624
Soft heavy metal melts at \({30\,^o}C\) and is used in making heat sensitive thermometers the metal is
1 Galium
2 Sodium
3 Potassium
4 Caesium
Explanation:
Gallium is a silvery, glass-like, soft metal. Its properties are close to the nonmetals in the periodic table and its metallic properties are not as metallic as most other metals. Solid gallium is brittle and is a poorer electrical conductor than lead. Gallium has the second largest liquid range of any element and is one of the few metals that is liquid near room temperature (m.pt. \(29.76\)), melting in the hand. So it is used in thermometer.
11. THE P-BLOCK ELEMENTS
189625
Which of the following is formed when aluminium oxide and carbon is strongly heated in dry chlorine gas
1 Aluminium chloride
2 Hydrate aluminium chloride
3 Anhydrous aluminium chloride
4 None of these
Explanation:
When aluminum oxide and carbon are strongly heated in dry chlorine gas anhydrous aluminum chloride is formed.
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11. THE P-BLOCK ELEMENTS
189621
The molecular formula of felspar is
1 \({K_2}O\,.\,A{l_2}{O_3}.\,6Si{O_2}\)
2 \({K_2}O\,.\,3A{l_2}{O_3}.\,6Si{O_2}\)
3 \(N{a_3}Al{F_6}\)
4 \(CaS{O_4}.\,2{H_2}O\)
Explanation:
Feldspar is \(K _2 O _2 Al _2 O _3 \cdot 6 SiO _2\).
11. THE P-BLOCK ELEMENTS
189622
The most acidic of the following compounds is
1 \({P_2}{O_3}\)
2 \(S{b_2}{O_3}\)
3 \({B_2}{O_3}\)
4 \(A{s_2}{O_3}\)
Explanation:
It’s Obvious.
11. THE P-BLOCK ELEMENTS
189623
Identify the statement that is not correct as far as structure of diborane is concerned
1 There are two bridging hydrogen atoms in diborane
2 Each boron atom forms four bonds in diborane
3 The hydrogen atoms are not in the same plane in diborane
4 All \(B - H\) bonds in diborane are similar
Explanation:
(d) \({B_2}{H_6}\) has two types of \(B - H\) bonds
11. THE P-BLOCK ELEMENTS
189624
Soft heavy metal melts at \({30\,^o}C\) and is used in making heat sensitive thermometers the metal is
1 Galium
2 Sodium
3 Potassium
4 Caesium
Explanation:
Gallium is a silvery, glass-like, soft metal. Its properties are close to the nonmetals in the periodic table and its metallic properties are not as metallic as most other metals. Solid gallium is brittle and is a poorer electrical conductor than lead. Gallium has the second largest liquid range of any element and is one of the few metals that is liquid near room temperature (m.pt. \(29.76\)), melting in the hand. So it is used in thermometer.
11. THE P-BLOCK ELEMENTS
189625
Which of the following is formed when aluminium oxide and carbon is strongly heated in dry chlorine gas
1 Aluminium chloride
2 Hydrate aluminium chloride
3 Anhydrous aluminium chloride
4 None of these
Explanation:
When aluminum oxide and carbon are strongly heated in dry chlorine gas anhydrous aluminum chloride is formed.
Feldspar is \(K _2 O _2 Al _2 O _3 \cdot 6 SiO _2\).
11. THE P-BLOCK ELEMENTS
189622
The most acidic of the following compounds is
1 \({P_2}{O_3}\)
2 \(S{b_2}{O_3}\)
3 \({B_2}{O_3}\)
4 \(A{s_2}{O_3}\)
Explanation:
It’s Obvious.
11. THE P-BLOCK ELEMENTS
189623
Identify the statement that is not correct as far as structure of diborane is concerned
1 There are two bridging hydrogen atoms in diborane
2 Each boron atom forms four bonds in diborane
3 The hydrogen atoms are not in the same plane in diborane
4 All \(B - H\) bonds in diborane are similar
Explanation:
(d) \({B_2}{H_6}\) has two types of \(B - H\) bonds
11. THE P-BLOCK ELEMENTS
189624
Soft heavy metal melts at \({30\,^o}C\) and is used in making heat sensitive thermometers the metal is
1 Galium
2 Sodium
3 Potassium
4 Caesium
Explanation:
Gallium is a silvery, glass-like, soft metal. Its properties are close to the nonmetals in the periodic table and its metallic properties are not as metallic as most other metals. Solid gallium is brittle and is a poorer electrical conductor than lead. Gallium has the second largest liquid range of any element and is one of the few metals that is liquid near room temperature (m.pt. \(29.76\)), melting in the hand. So it is used in thermometer.
11. THE P-BLOCK ELEMENTS
189625
Which of the following is formed when aluminium oxide and carbon is strongly heated in dry chlorine gas
1 Aluminium chloride
2 Hydrate aluminium chloride
3 Anhydrous aluminium chloride
4 None of these
Explanation:
When aluminum oxide and carbon are strongly heated in dry chlorine gas anhydrous aluminum chloride is formed.
Feldspar is \(K _2 O _2 Al _2 O _3 \cdot 6 SiO _2\).
11. THE P-BLOCK ELEMENTS
189622
The most acidic of the following compounds is
1 \({P_2}{O_3}\)
2 \(S{b_2}{O_3}\)
3 \({B_2}{O_3}\)
4 \(A{s_2}{O_3}\)
Explanation:
It’s Obvious.
11. THE P-BLOCK ELEMENTS
189623
Identify the statement that is not correct as far as structure of diborane is concerned
1 There are two bridging hydrogen atoms in diborane
2 Each boron atom forms four bonds in diborane
3 The hydrogen atoms are not in the same plane in diborane
4 All \(B - H\) bonds in diborane are similar
Explanation:
(d) \({B_2}{H_6}\) has two types of \(B - H\) bonds
11. THE P-BLOCK ELEMENTS
189624
Soft heavy metal melts at \({30\,^o}C\) and is used in making heat sensitive thermometers the metal is
1 Galium
2 Sodium
3 Potassium
4 Caesium
Explanation:
Gallium is a silvery, glass-like, soft metal. Its properties are close to the nonmetals in the periodic table and its metallic properties are not as metallic as most other metals. Solid gallium is brittle and is a poorer electrical conductor than lead. Gallium has the second largest liquid range of any element and is one of the few metals that is liquid near room temperature (m.pt. \(29.76\)), melting in the hand. So it is used in thermometer.
11. THE P-BLOCK ELEMENTS
189625
Which of the following is formed when aluminium oxide and carbon is strongly heated in dry chlorine gas
1 Aluminium chloride
2 Hydrate aluminium chloride
3 Anhydrous aluminium chloride
4 None of these
Explanation:
When aluminum oxide and carbon are strongly heated in dry chlorine gas anhydrous aluminum chloride is formed.
