Assertion (A):	Phosphorous (V) has a tendency to only gain electrons as it is in its highest oxidation state
Reason (R):	PCl5 can act as an oxidizing as well as a reducing agent.

 

1.	(A) is true and (R) is the correct explanation of (A).
2.	(A) is true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false

The catalyst that is used in the contact process is:

Which of the following represents the correct chemical formula of oleum?

The correct order of bond dissociation energy of halogens ${\text{F}}_2,<mspace\; width="1em"></mspace>{\mathrm{Cl}}_2,<mspace\; width="1em"></mspace>{\mathrm{Br}}_2<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{I}}_2$ is-

1. F₂ < Cl₂ < Br₂ < I₂

2. I₂ > Br₂ > F₂ > Cl₂

3. Cl₂ > Br₂ < F₂ > I₂

4. I₂ < F₂ < Br₂ < Cl₂

Which of the following represents the correct increasing order of basic strength of the Group 15 hydrides?
1. BiH₃ \(\simeq \) SbH₃ < AsH₃ < PH₃ < NH₃ 
2.  BiH₃  > NH₃  > PH₃ > SbH₃ > AsH₃ 
3. SbH₃ < AsH₃ < PH₃ < NH₃ < BiH₃ 
4. AsH₃ > NH₃ > PH₃ > SbH₃ > BiH₃

Which of the following types of π-bonding is present in the N₂ molecule?
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.

Which of the following Group 15 elements forms the strongest bond with hydrogen?

Which of the following is not a condition used in the Haber process for the manufacture of ammonia?

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

Number of moles of copper used when

(i) Copper reacts with dilute nitric acid

(ii) Copper reacts with concentrated nitric acid

are respectively:-

1. 1,1

2. 1,3

3. 3,1

4. 3,3