The correct statement(s) among the following options is/are:
1. | Aluminium alloys are used to make aircraft bodies. |
2. | Aluminium utensils should not be kept in water overnight. |
3. | Aluminium wire is used to make transmission cables. |
4. | All of the above |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe correct statement(s) regarding diborane and boric acid is/are-
1. Diborane has two 3c-2e- bonds.
2. Boric acid has a layered structure.
3. Four 2c-2e- bonds are present in diborane.
4. All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAssertion: B-X bond length in is shorter than the expected value.
Reason: back bonding occurs between B and X.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA compound X, of boron, reacts with on heating to give another compound Y which is called inorganic benzene. The compound X can be prepared by treating with Lithium aluminium hydride. The compounds X and Y are represented by the formulas -
1. | \(\mathrm{B}_2 \mathrm{H}_6, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) | 2. | \(\mathrm{B}_2 \mathrm{O}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) |
3. | \(\mathrm{BF}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) | 4. | \(\mathrm{B}_3 \mathrm{~N}_3 \mathrm{H}_6, \mathrm{~B}_2 \mathrm{H}_6\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBoric acid is a-
1. Protic acid.
2. Weak monobasic acid.
3. Lewis acid.
4. Both '2' and '3'
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biologyis -
1. A Monobasic acid and a weak Lewis acid.
2. A Monobasic and a weak Bronsted acid..
3. A Monobasic and a strong Lewis acid.
4. A Tribasic and a weak Bronsted acid.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBoric acid is polymeric due to-
1. Its acidic nature.
2. The presence of hydrogen bonds.
3. Its monobasic nature.
4. Its geometry.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn diborane, the two H-B-H angles are nearly-
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe effect of heating Boric acid at 370 K or above is -
1. Orthoboric acid changes to metaboric acid.
2. Metaboric acid changes to boric oxide.
3. Both '1' and '2'
4. Neither '1' nor '2'
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyQuartz is made of silicon and oxygen joined in a network arrangement that is similar to:
1. Diamond
2. Graphite
3.
4. None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology