Identify the correct statements from the following:

(a)	\(\mathrm{CO}_2(\mathrm{~g})\) is used as a refrigerant ice cream and frozen food.
(b)	The structure of \(\mathrm{C}_{60} \)  customs12 six carbon rings and 25 five carbon rings
(c)	ZSM-5, a type of zeolite, is used to convert alcohol into gasoline.
(d)	CO is a colorless and odorless gas.

 

1.	(a) and (c) only	2.	(b) and (c) only
3.	(c) and (d) only	4.	(a), (c) and (d) only

Which of the following oxide is amphoteric in nature?

1. SnO₂

2. SiO₂

3. GeO₂

4. CO₂

The compound among the following that used in cosmetic surgery is:

1. Silica

2. Silicates

3. Silicones

4. Zeolites

Aluminium chloride in acidified aqueous solution forms a complex 'A'.
The formula of A and hybridisation state of Al in 'A' is respectively:

1. [Al(H₂O)₆]³⁺, sp³d²

2. [Al(H₂O)₄]³⁺, sp³

3. [Al(H2O)4]3+, dsp2

4. [Al(H₂O)]³⁺, d²sp³

Which of the following species is not stable?

1. ${\left[{\mathrm{SiCl}}_6\right]}^{2-}$

2. ${\left[{\mathrm{SiF}}_6\right]}^{2-}$

3. ${\left[{\mathrm{GeCl}}_6\right]}^{2-}$

4. ${\left[\mathrm{Sn}{\left(\mathrm{OH}\right)}_6\right]}^{2-}$

The incorrect statement among the following is:

1.  SnF₄ is ionic in nature.

2.  PbF₄ is covalent in nature.

3.  SiCl₄ is easily hydrolysed.

4.  GeX₄ (X = F, Cl, Br, I) is more stable than GeX₂

Which of the following is the correct statement?
1. Ga⁺ is more stable than ln⁺.
2. Al⁺ is more stable than ln⁺.
3. Ga⁺ is more stable than Al⁺.
4. Al⁺ is more stable than Ga⁺.

The chain length of silicones can be controlled by adding:
1.  \(\mathrm{CH_3SiCl_3}\)
2.  \(\mathrm{SiCl_4}\)
3.  \(\mathrm{(CH_3)_2SiCl_2}\)
4.  \(\mathrm{(CH_3)_3SiCl}\)