English Medium इयत्ता १० - CBSE Question Bank Solutions

Fill in the blank in the following sentence:

Two atoms of the same element combine to form a molecule. The bond between them is known as ................ bond.

Fill in the blank in the following sentence:

Two chlorine atoms combine to form a molecule. The bond between them is known as ..........

Fill in the blanks in the following sentence:

In forming oxygen molecule, .............. electrons are shared by each atom of oxygen.

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In forming N₂ molecule, .............. electrons are shared by each atom of nitrogen.

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The number of single covalent bonds in C₂H₂ molecule are ...........

Fill in the following blank with suitable word:

The general formula C_nH_2n for cycloalkanes is the same as that of ...........

What is the atomic number of carbon. Write its electronic configuration.

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?