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

The electronic configuration of N2 is 2, 5. How many electrons in the outer shell of a N atom are not involved in the formation of a nitrogen molecule?

Fill in the blank with correct word from the bracket.
Melting and boiling points of covalent compounds are generally ______ (low, high).

What is the term defined below?

A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.

Give a reason as to why hydrogen chloride can be termed as a polar covalent compound.

Compare the compounds carbon tetrachloride and sodium chloride with regard to solubility in water and electrical conductivity.

The molecule which contains a triple covalent bond is ______.

Explain the bonding in methane molecule using electron dot structure.

An element L consists of molecules.

1. Which type of bond is present in the particles that make up L?
2. When L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe change undergone by L?
   

An element L consists of molecules.
Why L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?

The following table shows the electronic configuration of the elements W, X, Y, Z:

Answer the following questions based on the table above:

What type of bond is formed between Y and Z.

The particles present in strong electrolytes are

Fill in the blank from the choice given in bracket.
The compound that does not have a lone pair of electrons is ___________. (Water, Ammonia, carbon tetrachloride)

Which of the following is a common characteristic of a covalent compound?

State the type of bonding in the following molecule.
Water

Draw an electron dot diagram to show the formation of the following compound.

Methane

[H = 1, C = 6]

Draw an electron dot diagram to show the formation of the following compound.

Magnesium chloride

[Mg = 12, Cl = 17]

Name a solution that will separate the component of the following mixture: Zn(OH)₂ from Pb(OH)₂

Name a solution that will separate the component of the following mixture: CaO from PbO

Name a solution that will separate the component of the following mixture: CuO from ZnO

Choose the correct answer from the options given below :
Color of ferrous ion is