(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

which element has the highest ionisation potential.

Choose the correct answer from the choice given:
Ionisation potential increases over a period from left to right because the

Arrange the following as per the instruction given in the bracket:

Na, K, Cl, S, Si (increasing order of ionization energy)

Rewrite the following sentence by using the correct > (greater than) or < (less than) in the blank given 
The ionization potential of potassium is _______ that of sodium.

Fill in the blank by selecting the correct word from the option.
If an element has a low ionization energy then it is likely to be ________ 

Fill in the blank from the choice given in bracket.
The energy required to remove on electron from a natural isolated gaseous atom and convert it into a positively charged gaseous ion is called ____________

Arrange the following as per the instruction given in the bracket
Na,Li,K (Increasing ionization energy)

Define
an electrovalent compound

Define
a covalent compound.

Give three uses of ammonium chloride.

Explain the following:

Ammonium nitrate is not used in the laboratory preparation of NH₃.

Give one use each of four different compounds of ammonia.

The changes in the properties of elements on moving from left to right across a period of the Periodic Table. For the property, choose the correct answer. 

The ionization potential: 

Why drying agents such as P₂O₅ and CaCl₂ are not used to dry NH₃?

Name the common refrigerant. How does it deplete the ozone layer?

State the advantages of using ammonia as a refrigerant?

1. Which feature of the ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water?
2. Name the other ion formed when ammonia dissolves in water.
3. Give one test that can be used to detect the presence of the ion produced in (b).

Give reason for the following:

Ionisation potential decreases down a group.

State the term for the following:

The group obtained by removing one hydrogen atom from the parent alkane.