Identify the correct statements among the following:

a.	CO2 (g) is used as a refrigerant for ice-cream and frozen food.
b.	The structure of C60 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

Which one of the following reactions does not come under hydrolysis type reaction?

1. ${\mathrm{SiCl}}_{4\left(1\right)}+2{\mathrm{H}}_2{\mathrm{O}}_{\left(1\right)}\to {\mathrm{SiO}}_{2\left(\mathrm{s}\right)}+4{\mathrm{HCl}}_{\left(\mathrm{aq}\right)}$

2. ${\mathrm{Li}}_3{\mathrm{N}}_{\left(\mathrm{s}\right)}+3{\mathrm{H}}_2{\mathrm{O}}_{\left(1\right)}\to {\mathrm{NH}}_{3\left(\mathrm{g}\right)}+3{\mathrm{LiOH}}_{\left(\mathrm{aq}\right)}$

3. $2{\mathrm{F}}_{2\left(\mathrm{g}\right)}+2{\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{l}\right)}\to 4{\mathrm{HF}}_{\left(\mathrm{aq}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}$

4. ${\mathrm{P}}_4{\mathrm{O}}_{10\left(\mathrm{s}\right)}+6{\mathrm{H}}_2{\mathrm{O}}_{\left(1\right)}\to 4{\mathrm{H}}_3{\mathrm{PO}}_{4\left(\mathrm{aq}\right)}$

Why the +1 oxidation state in group 13 and +2 oxidation state in group 14 becomes more and more stable with increasing atomic number?

1. Due to the Inert pair effect

2. Due to a decrease in electronegativity

3. Due to the increase in the size of an atom

4. Due to a decrease in electron affinity

What is the hydrolysis product of AlCl₃ and hybridization of Al in this product?

1. ${\left[\mathrm{Al}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+} \& {\mathrm{sp}}^3$

2. ${\left[\mathrm{Al}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+} \& {\mathrm{sp}}^3\mathrm{d}$

3. ${\left[\mathrm{Al}{\left({\mathrm{H}}_2\mathrm{O}\right)}_4\right]}^{3+} \& {\mathrm{sp}}^3$

4. ${\left[\mathrm{Al}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+} \& {\mathrm{sp}}^3{\mathrm{d}}^2$

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 the inert pair effect

Why does the element silicon, not form a graphite-like structure whereas carbon does?

1. Due to the smallest size and highest electronegativity of Si-element in group

2. Due to the smallest size and Highest electronegativity of C-element in group

3. Due to inert pair effect

4. Due to Fajan's rule

Why PbO₂ is a stronger oxidising agent than SnO₂

_{1. Due to inert pair effect}

_{2. Due to high electronegativity diffrence in both}

_{3. Due to High size diffrence in both}

_{4. None of these}

Boron fluoride exists as BF₃ but boron hydride doesn't exist as BH₃ because

1. Due to pπ−pπ  back bonding in BF₃

2. Due to pπ−dπ  back bonding in BF₃

3. Due to pπ−pπ  backbonding in BH₃

4. Due to pπ−dπ  backbonding in BH₃

A compound among the following that is used in cosmetic surgery is -

Dry ice is -

1. Solid NH₃

2. Solid SO₂

3. Solid CO₂

4. Solid N₂