Aluminium reacts with concentrated HCl and concentrated NaOH to liberate which of the following gases respectively-

1.	\(\mathrm{H}_2 ~\text{and} ~\mathrm{H}_2 \)	2.	\(\mathrm{O}_2 ~\text{and} ~\mathrm{O}_2 \)
3.	\(\mathrm{O}_2 ~\text{and} ~\mathrm{H}_2 \)	4.	\(\mathrm{H}_2 ~\text{and} ~\mathrm{O}_2 \)

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

A compound among the following that is not a monomer for a high molecular mass silicone polymer is-

1. ${\mathrm{Me}}_3\mathrm{SiCl}$

2. ${\mathrm{PhSiCl}}_3$

3. ${\mathrm{MeSiCl}}_3$

4. ${\mathrm{Me}}_2{\mathrm{SiCl}}_2$

The basic structural unit of silicates is-

When silicon is boiled with caustic soda solution, the gas is evolved is-

1. ${\mathrm{O}}_2$

2. ${\mathrm{SiH}}_4$

3. ${\mathrm{H}}_2$

4. None of the above

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

${\mathrm{H}}_3{\mathrm{BO}}_3$ is -

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.

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

Codes

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

Given below are two statements: