Match the formulas of oxides given in Column I with the type of oxide given in Column II and mark the correct option.

Column I	Column II
A.  Pb3O4	1. Neutral oxide
B.  N2O	2. Acidic oxide
C.  Mn2O7	3. Basic oxide
D.  Bi2O3	4. Mixed oxide

Codes

	A	B	C	D
1.	1	2	3	4
2.	4	1	2	3
3.	3	2	4	1
4.	4	3	1	2

 Match the species given in Column I with the shape given in Column II and mark the correct option.

Codes

The bonding present in nitrogen molecules is:
1. \(p\pi-p\pi\)
2. \(p\pi-d\pi\)
3. \(d\pi-d\pi\)
4. Only sigma bond

Which of the following is true about reactivity of group 15 elements?

1. Stability of their hydrides increases down the group.

2. Higher oxides are acidic in nature.

3. All elements form pentahalides.

4. They do not react with metals.

The element from group 15 that forms a strong bond with hydrogen is:

The condition that does not exist in the Haber process for the manufacturing of ammonia is:

1. Pressure (around 200 ×10⁵ Pa)
2. Temperature (700 K)
3. Catalyst such as iron oxide.
4. Presence of inert gases.

An element that does not have a d-orbital is:

The least basic compound is:

1. BiH₃

2. AsH₃

3. PH₃

4. NH₃

Incorrect statement about red phosphorus is:

1. It is hard and crystalline.

2. It is poisonous.

3. It is less reactive than white phosphorus.

4. It is insoluble in water.

Which element exhibits the highest catenation property?

1. Phosphorus

2. Nitrogen

3. Antimony

4. Bismuth