Question

chemistry
Question 19

During ionisation, metals lose electrons this change can be called:

1. Oxidation

2. Reduction

3. Redox

4. Displacement

[1]

Question 20

The oxide of a metal that reacts both with acid and alkali to form salt and water:

1. Sodium oxide

2. Magnesium oxide

3. Aluminium oxide

4. Ferrous oxide

[1]

Question 21

The property which decreases from left to right across the periodic table:

1. Electron affinity

2. Electro negativity

3. Ionisation energy

4. Metallic character

[1]

Question 22

On the basis of electronic configuration the period and group of 5

9

is:

1. 2 and IIIA

2. 3 and IIA

3. 4 and VIA

4. 5 and VIIA

[1]

Question 23

Select the ion that would get selectively discharged from the aqueous mixture of

the ions listed below:

1. SO4

-2



2. NO3

-1

3. OH-1



4. Cl-1

[1]​

Answer 1

Q no 19 answer is

1. oxidation

Q no 21 answer is

1 . Electron affinity

Q. no 23 answer is

3 . OH -1