English Medium Class 10 - CBSE Question Bank Solutions for Science

What is a covalent bond? 

What type of bond exist in CCl₄?

What type of chemical bonds are formed by carbon? Why?

What type of bond is present in oxygen molecule?

What type of chemical bond is present in chlorine molecule? Explain your answer.

 Explain the formation of a chlorine molecule on the basis of electronic theory of valency.

Give one example, state what are covalent compounds?

Compare the properties of ionic compounds and covalent compounds.

Explain why covalent compounds have generally high melting points?

What is buckminsterfullerene?

How  buckminsterfullerene is it related to diamond and graphite?

 Why is diamond used for making cutting tools (like glass cutters) but graphite is not?

Give two general properties of ionic compounds and two those of covalent compounds.

State one test by which sodium chloride can be distinguished from sugar.

Explain why, ionic compounds conduct electricity in solution whereas covalent compounds do not conduct electricity.

Friedrich Wohler converted an inorganic compound into an organic compound in the laboratory.

Write the name and formula of organic compound formed.

will CCl₄ conduct electricity or not?

give reason for your choice.

will  CS₂ conduct electricity or not?

give reason for your choice.