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

Explain the structure of Hydronium ion.

Explain the structure of Ammonium ion.

Explain the following:
Covalent compounds are generally gases or liquids or soft solids.

Explain the following:
Covalent compounds have low melting and boiling point.

Explain the following:
Non-polar covalent compounds are insoluble in water.

Explain the following:
Polar covalent compounds are good conductors of electricity.

Choose the correct answer from the options given below
Condition favorable for formation of a covalent bond is

Choose the correct answer from the options given below 
Which one is not example of polar covalent compound?

(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
The type of bonding in X will be

(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
X is likely to have a :

(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
In the liquid state, X will

Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.

Explain why Carbon tetrachloride does not dissolve in water.

Name a neutral covalent molecule which contains one lone pair of electrons.

In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?

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 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.