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

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.

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

Potassium, Lithium, Sodium (increasing order of ionization potential).

Identify the following:

The energy required to remove an electron from a neutral gaseous atom.

Arrange the following as per instruction given in the bracket.

Na, Mg, Cl, S, Si (increasing ionisation potential)

Arrange the following as per instruction given in the bracket.

Li, K, Na, H (decreasing order of their potential ionisation)

First ionisation enthalpy of two elements X and Y are 500 kJ mol⁻¹ and 375 kJ mol⁻¹ respectively. Comment about their relative position in a group as well as in a period.

Arrange the following in order of increasing ionisation energy:

P, Na, Cl

Explain your choice.

Arrange the following in order of increasing ionisation energy:

F, O, Ne

Explain your choice.

Arrange the following in order of increasing ionisation energy:

Ne, He, Ar

Explain your choice.

Across a period, the ionization potential ______.

Across a period, the ionization potential ______.

With reference to the variation of properties in the Periodic Table, which of the following is generally true?

Give reason:

Ionisation potential of the element increases across a period from left to right.

Ionisation Potential values depend on atomic size. Explain.

Ionisation Potential values depend on the nuclear pull. Explain.

The element with highest ionisation potential is ______.

This question refers to the elements of the Periodic Table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.

Which of these have least Ionisation Energy?

Give an example in the following case:

Compound with electrovalent and covalent bond