NEET Test Series from KOTA - 10 Papers In MS WORD
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11. THE P-BLOCK ELEMENTS
189993
Monomer unit of silicone's
1 \(R_2SiO_2\)
2 \(R_3SiO\)
3 \(RSiO_2\)
4 \(R_2SiO\)
Explanation:
11. THE P-BLOCK ELEMENTS
189994
Shape of \((SiH_3)_3N\) and \((SiH_3)_3P\) respectively are
1 Trigonal planar, Trigonal planar
2 Trigonal planar, Tetrahedral
3 Tetrahadral, Tetrahedral
4 Tetrahedral, Trigonal planar
Explanation:
11. THE P-BLOCK ELEMENTS
189995
Which of the following cation can not give borax bead test ?
1 \(Cr^{3+}\)
2 \(Co^{2+}\)
3 \(Ag^+\)
4 \(Mn^{2+}\)
Explanation:
\(Ag ^{+}\) ion can not give borax bead test because formed silver metaborate \(AgBO _2\) is white/colorless.
11. THE P-BLOCK ELEMENTS
189996
Which of the following is responsible for cleansing action of Borax
1 its acidic nature
2 its basic nature
3 its neutral nature
4 none of these
Explanation:
When borax is dissolved in water it ionizes and hydrolysis of borate ion gives \(OH\) (the hydroxyl ion) and boric acid. Since boric acid is a weak acid and \(NaOH\) is strong a alkali an aqueous solution of borax is alkaline in nature.
189994
Shape of \((SiH_3)_3N\) and \((SiH_3)_3P\) respectively are
1 Trigonal planar, Trigonal planar
2 Trigonal planar, Tetrahedral
3 Tetrahadral, Tetrahedral
4 Tetrahedral, Trigonal planar
Explanation:
11. THE P-BLOCK ELEMENTS
189995
Which of the following cation can not give borax bead test ?
1 \(Cr^{3+}\)
2 \(Co^{2+}\)
3 \(Ag^+\)
4 \(Mn^{2+}\)
Explanation:
\(Ag ^{+}\) ion can not give borax bead test because formed silver metaborate \(AgBO _2\) is white/colorless.
11. THE P-BLOCK ELEMENTS
189996
Which of the following is responsible for cleansing action of Borax
1 its acidic nature
2 its basic nature
3 its neutral nature
4 none of these
Explanation:
When borax is dissolved in water it ionizes and hydrolysis of borate ion gives \(OH\) (the hydroxyl ion) and boric acid. Since boric acid is a weak acid and \(NaOH\) is strong a alkali an aqueous solution of borax is alkaline in nature.
189994
Shape of \((SiH_3)_3N\) and \((SiH_3)_3P\) respectively are
1 Trigonal planar, Trigonal planar
2 Trigonal planar, Tetrahedral
3 Tetrahadral, Tetrahedral
4 Tetrahedral, Trigonal planar
Explanation:
11. THE P-BLOCK ELEMENTS
189995
Which of the following cation can not give borax bead test ?
1 \(Cr^{3+}\)
2 \(Co^{2+}\)
3 \(Ag^+\)
4 \(Mn^{2+}\)
Explanation:
\(Ag ^{+}\) ion can not give borax bead test because formed silver metaborate \(AgBO _2\) is white/colorless.
11. THE P-BLOCK ELEMENTS
189996
Which of the following is responsible for cleansing action of Borax
1 its acidic nature
2 its basic nature
3 its neutral nature
4 none of these
Explanation:
When borax is dissolved in water it ionizes and hydrolysis of borate ion gives \(OH\) (the hydroxyl ion) and boric acid. Since boric acid is a weak acid and \(NaOH\) is strong a alkali an aqueous solution of borax is alkaline in nature.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
11. THE P-BLOCK ELEMENTS
189993
Monomer unit of silicone's
1 \(R_2SiO_2\)
2 \(R_3SiO\)
3 \(RSiO_2\)
4 \(R_2SiO\)
Explanation:
11. THE P-BLOCK ELEMENTS
189994
Shape of \((SiH_3)_3N\) and \((SiH_3)_3P\) respectively are
1 Trigonal planar, Trigonal planar
2 Trigonal planar, Tetrahedral
3 Tetrahadral, Tetrahedral
4 Tetrahedral, Trigonal planar
Explanation:
11. THE P-BLOCK ELEMENTS
189995
Which of the following cation can not give borax bead test ?
1 \(Cr^{3+}\)
2 \(Co^{2+}\)
3 \(Ag^+\)
4 \(Mn^{2+}\)
Explanation:
\(Ag ^{+}\) ion can not give borax bead test because formed silver metaborate \(AgBO _2\) is white/colorless.
11. THE P-BLOCK ELEMENTS
189996
Which of the following is responsible for cleansing action of Borax
1 its acidic nature
2 its basic nature
3 its neutral nature
4 none of these
Explanation:
When borax is dissolved in water it ionizes and hydrolysis of borate ion gives \(OH\) (the hydroxyl ion) and boric acid. Since boric acid is a weak acid and \(NaOH\) is strong a alkali an aqueous solution of borax is alkaline in nature.