# Match the species given in Column I with the properties mentioned in Column II. Column I          Column II A.  $$\text{BF}^-_4$$ 1. Oxidation state of the central atom is +4 B.  AlCl3 2. Tetrahedral shape C.  SnO 3. Lewis acid D.  PbO2 4. Can be further oxidized Codes A B C D 1. 2 3 4 1 2. 1 2 3 4 3. 1 4 3 2 4. 4 1 3 2

Subtopic:  Boron Family- Preparations, Properties & Uses |
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Match the species given in Column I with properties given in Column II.

 Column I Column II A. Diborane 1. Used as a flux for soldering metals B.  Quartz 2. Crystalline form of silica C. Borax 3. Banana bonds D. Aluminosilicate 4. Used as a catalyst in petrochemical industries
Codes
 A B C D 1. 3 4 1 2 2. 1 2 3 4 3. 3 2 1 4 4. 4 1 3 2
Subtopic:  Boron Family- Preparations, Properties & Uses |
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Assertion: If aluminium atoms replace a few silicon atoms in three-dimensional network of silicon dioxide, the overall structure acquires a negative charge.

Reason: Aluminium is trivalent while silicon is tetravalent.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.

2. Both assertion and reason are true and the reason is not the correct explanation of assertion.

3. Assertion is true but the reason is false.

4. Assertion is false but the reason is true.

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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Assertion: Silicones are water-repelling in nature.

Reason: Silicones are organosilicon polymers, which have $\left(-{\mathrm{R}}_{2}\mathrm{SiO}-\right)$ as repeating units.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true, but the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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The correct order of ease of hydrolysis is-

1. CCl4 < SiCl4 < PCl5 < AlCl3

2. AlCl3 < CCl4 < PCl5 < SiCl4

3. CCl4 < AlCl3 < PCl5 < SiCl4

4. CCl4 < AlCl3 < SiCl4 < PCl5

Subtopic:  Compounds of Carbon, Preparations, Properties & Uses |
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Dry ice is -

1. Solid NH3

2. Solid SO2

3. Solid CO2

4. Solid N2

Subtopic:  Compounds of Carbon, Preparations, Properties & Uses |
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The reason behind carbon showing catenation property but lead does not is-

1. Due to the smaller size of C than that of Pb

2. Due to the smaller size of Pb than that of C

3. Due to the smaller ionization energy of C than that of Pb

4. Due to inert pair effect

Subtopic:  Carbon Family - Preparations, Properties & Uses |
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Identify the correct statements among the following:

a. ${\mathrm{CO}}_{2}\left(\mathrm{g}\right)$ is used as a refrigerant for ice-cream and frozen food.

b. The structure of ${\mathrm{C}}_{60}$ contains twelve six-carbon rings and twenty five-carbon rings.

c. ZSM-5, a type of zeolite, is used to convert alcohol into gasoline.

d. CO is a colourless and odourless gas

1. (a) and (c) only

2. (b) and (c) only

3. (c) and (d) only

4. (a), (b) and (c) only

Subtopic:  Carbon Family - Preparations, Properties & Uses | Compounds of Carbon, Preparations, Properties & Uses |
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BCl has higher stability than ${\mathrm{TlCl}}_{3}$, because -

1. The +2 oxidation state of Tl is more stable than the +2 oxidation state of B

2. The +2 oxidation state of B is more stable than the +2 oxidation state of Tl

3. The +3 oxidation state of B is more stable than the +3 oxidation state of Tl

4. The +3 oxidation state of Tl is more stable than the +3 oxidation state of B

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Boron trifluoride behaves as a Lewis acid because -

1. Boron trifluoride is electron-rich.

2. Boron trifluoride is electron-deficient.

3. Boron trifluoride is highly stable.

4. None of these.

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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