(English Medium) ICSE Class 10 - CISCE Important Questions for Chemistry

The energy released when an electron is added to a neutral gaseous isolated atom to form a negatively charged iron.

A process of formation of ions from molecules which are not in the ionic state

Give a reason for Ionisation potential increases across a period, from left to right

In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:

The element B would have ______ metallic character than A.

Define the term Electronegativity.

An element in period 3, whose electron affinity is zero:

The most electronegative element from the following elements is:

In Period 3, the most metallic element is ______.

K, Pb, Ca, Zn (In the increasing order of the reactivity) 

Mg2⁺, Cu2⁺, Na1⁺, H1⁺ (In the order of preferential discharge at the cathode) 

 Li, K, Na, H (In the decreasing order of their ionization potential) 

F, B, N, O  (In the increasing order of electron affinity) 

Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 

Which element forms electrovalent compound with G? 

Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 

The ion of which element will migrate towards the cathode during electrolysis?

 Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 

Which non-metallic element has the valency of 2?

Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 

Which is an inert gas? 

An element with the largest atomic radius among the following is ______.

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

P, Si, F, Be (decreasing order of valence electrons)

Give reason for the following:

Ionisation potential decreases down a group.

In the 2^nd period Neon has maximum Ionization Potential because ______.