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

State your observation of the following case:

When calcium hydroxide is heated with ammonium chloride crystals.

Compound X consists of molecules.

Choose the letter corresponding to the correct answer from the options A, B, C and D given below: 

The type of bonding in X will be ______.

Compound X consists of molecules.

Choose the letter corresponding to the correct answer from the options A, B, C and D given below:

X is likely to have a ______.

Electrons are getting added to an element Y: 

Is Y getting oxidised or reduced?

Electrons are getting added to an element Y: 

which electrode will Y migrate to during the process of electrolysis?

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

Explain why carbon tetrachloride does not dissolve in water.

Elements Q and S react together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in?

What are the term defined below?

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

Draw the electron dot diagram and structure of nitrogen molecule.

Draw the electron dot diagram and structure of magnesium chloride.

Draw the electron dot diagram and structure of methane.

What do you understand by dipole (polar) molecule? 

State the type of bond formed when the combining atom has zero E.N. difference. 

State the type of bond formed when the combining atom has small E.N. difference.

State the type of bond formed, and draw Lewis structure of water.

Explain the following:

Water is a polar covalent molecule.

Element A has 2 electrons in its M shell. Element B has atomic number 7.

Write equations to show how A and B form ions.

Element A has 2 electrons in its M shell. Element B has atomic number 7.

If B is a diatomic gas, write the equation for the direct combination of A and B to form a compound.

Element A has 2 electrons in its M shell. Element B has atomic number 7.

If the compound formed between A and B is melted and an electric current is passed through the molten compound, the element A will be obtained at the ______ and B at the ______ of the electrolytic cell.