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

Match the species given in Column I with properties given in Column II.

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.

Assertion: Silicones are water-repelling in nature.

Reason: Silicones are organosilicon polymers, which have $(-{\mathrm{R}}_2\mathrm{SiO}-)$ 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.

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

Dry ice is -

1. Solid NH₃

2. Solid SO₂

3. Solid CO₂

4. Solid N₂

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

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

BCl₃  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

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.