Of the following options, only Boron is a non-metal.
11. THE P-BLOCK ELEMENTS
189631
Which of the following is most acidic
1 \(N{a_2}O\)
2 \(MgO\)
3 \(A{l_2}{O_3}\)
4 \(CaO\)
Explanation:
\(Na 2 O , MgO , CaO\) are metallic oxide of \(s\) block. These maetallic oxides powerful bases, while \(Al _2 O 3\) is metallic oxide of \(p\) block which has comapratively more acidic character. Hence, it is the most acidic oxide among all.
11. THE P-BLOCK ELEMENTS
189632
When orthoboric acid \(({H_3}B{O_3})\) is heated, the residue left is
1 Metaboric acid
2 Boron
3 Boric anhydride
4 Borax
Explanation:
(c) \(2{H_3}B{O_3} \to {B_2}{O_3} + 3{H_2}O\).
11. THE P-BLOCK ELEMENTS
189633
Which of the following form dimeric halides
Of the following options, only Boron is a non-metal.
11. THE P-BLOCK ELEMENTS
189631
Which of the following is most acidic
1 \(N{a_2}O\)
2 \(MgO\)
3 \(A{l_2}{O_3}\)
4 \(CaO\)
Explanation:
\(Na 2 O , MgO , CaO\) are metallic oxide of \(s\) block. These maetallic oxides powerful bases, while \(Al _2 O 3\) is metallic oxide of \(p\) block which has comapratively more acidic character. Hence, it is the most acidic oxide among all.
11. THE P-BLOCK ELEMENTS
189632
When orthoboric acid \(({H_3}B{O_3})\) is heated, the residue left is
1 Metaboric acid
2 Boron
3 Boric anhydride
4 Borax
Explanation:
(c) \(2{H_3}B{O_3} \to {B_2}{O_3} + 3{H_2}O\).
11. THE P-BLOCK ELEMENTS
189633
Which of the following form dimeric halides
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11. THE P-BLOCK ELEMENTS
189630
Which of the following is a non-metal
1 Gallium
2 Indium
3 Boron
4 Aluminium
Explanation:
Of the following options, only Boron is a non-metal.
11. THE P-BLOCK ELEMENTS
189631
Which of the following is most acidic
1 \(N{a_2}O\)
2 \(MgO\)
3 \(A{l_2}{O_3}\)
4 \(CaO\)
Explanation:
\(Na 2 O , MgO , CaO\) are metallic oxide of \(s\) block. These maetallic oxides powerful bases, while \(Al _2 O 3\) is metallic oxide of \(p\) block which has comapratively more acidic character. Hence, it is the most acidic oxide among all.
11. THE P-BLOCK ELEMENTS
189632
When orthoboric acid \(({H_3}B{O_3})\) is heated, the residue left is
1 Metaboric acid
2 Boron
3 Boric anhydride
4 Borax
Explanation:
(c) \(2{H_3}B{O_3} \to {B_2}{O_3} + 3{H_2}O\).
11. THE P-BLOCK ELEMENTS
189633
Which of the following form dimeric halides
Of the following options, only Boron is a non-metal.
11. THE P-BLOCK ELEMENTS
189631
Which of the following is most acidic
1 \(N{a_2}O\)
2 \(MgO\)
3 \(A{l_2}{O_3}\)
4 \(CaO\)
Explanation:
\(Na 2 O , MgO , CaO\) are metallic oxide of \(s\) block. These maetallic oxides powerful bases, while \(Al _2 O 3\) is metallic oxide of \(p\) block which has comapratively more acidic character. Hence, it is the most acidic oxide among all.
11. THE P-BLOCK ELEMENTS
189632
When orthoboric acid \(({H_3}B{O_3})\) is heated, the residue left is
1 Metaboric acid
2 Boron
3 Boric anhydride
4 Borax
Explanation:
(c) \(2{H_3}B{O_3} \to {B_2}{O_3} + 3{H_2}O\).
11. THE P-BLOCK ELEMENTS
189633
Which of the following form dimeric halides