Question

1. Why is Bi(v) a stronger oxidant than Sb(v)?
2. What is the oxidation number of phosphorus in H3PO2 molecule?
3. Fluorine does not exhibit any positive oxidation state. Why?
4. Which is a stronger reducing agent, SbH3 or BiH3, and why?
5. Why do transition elements show variable oxidation states?
6. Explain the following observations:
(i) Transition elements generally form coloured compounds.
(ii) Zinc is not regarded as a transition element.
7. Assign reasons for each of the following:
(i) Transition metals generally form coloured compounds.
(ii) Manganese exhibits the highest oxidation state of +7 among the 3d series of
transition elements.​

Answer 1

Answer:

The positive electrode is called anode and the negative electrode is called cathode. When a high voltage is applied between the cathode and the anode, the electrons are accelerated at high speed from the cathode to the anode. This stream of electrons which is moving at high speed is called cathode rays

Answer 2

Answer:

1. Why is Bi(v) a stronger oxidant than Sb(v)?

2. What is the oxidation number of phosphorus in H3PO2 molecule?

3. Fluorine does not exhibit any positive oxidation state. Why?

4. Which is a stronger reducing agent, SbH3 or BiH3, and why?

5. Why do transition elements show variable oxidation states?

6. Explain the following observations:

(i) Transition elements generally form coloured compounds.

(ii) Zinc is not regarded as a transition element.

7. Assign reasons for each of the following:

(i) Transition metals generally form coloured compounds.

(ii) Manganese exhibits the highest oxidation state of +7 among the 3d series of

transition elements.