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

Arrange the elements of second and third period in increasing order of ionization energy.

Name the periodic property which relates to the amount of energy required to remove an electron from an isolated gaseous atom.

Arrange the elements of group 17 and group 1 according to the given conditions.

Increasing ionization potential

Taking MgCI₂ as an electrovalent compound, CCI₄ as a covalent compound, give four differences between electrovalent and covalent compounds.

Give reason for the following:

Ionisation potential of the element increases across a period.

Which element has:

two shells, both of which are completely filled with electrons?

Which element from the following has the highest ionization energy?
Explain your choice.

P, Na, CI

Which element from the following has the highest ionization energy?
Explain your choice.

F, O, Ne

Which element from the following has the highest ionization energy?
Explain your choice.

Ne, He, Ar

Choose the correct answer.

An element with highest ionization potential
(i) Calesium
(ii) Fluorine
(iii) Helium
(iv) Neon

The skin has and needs natural oils. Why is it advisable to wear gloves while working with strong allkalis?

What is the difference between:

Modern explanation and Arrhenius explanation for the theory of electrolysis.

What is the difference between:

Electrolytic dissociation and thermal dissociation.

Give reasons for the following:

Liquid ammonia is used as a refrigerant in ice plants.

Give reasons for the following:

Aqueous solution of ammonia is used for removing grease stains from woollen clothes.

Give reasons for the following:

Aqueous solution of ammonia gives a pungent smell.

Give reasons for the following:

Aqueous solution of ammonia conducts electricity.

Name one salt of ammonia that is used in a dry cell.

Name a compound prepared by ammonia and is used as explosive.

Name a compound prepared by ammonia and is used as fertilizers.