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Question

Fill in the  blanks in the following sentences:
(i) Two atoms of the same element combine to form a molecule. The bond between them is known as .. bond.
(ii) Two chlorine atoms combine to form a molecule. The bond between them is known as....
(iii) In the formation of an oxygen molecule, ... electrons are shared by each atom of oxygen.
(iv) In the formation of a N2 molecule, ... electrons are shared by each atom on nitrogen.
(v) The number of single covalent bonds in C2H2 molecule are....
(vi) Melting points and boiling points of ionic compounds are generally ... Than those of covalent compounds.


Solution

(i) Two atoms of the same elements combine to form a molecule. The bond between them is known as a covalent bond.

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

(iii) In the formation of an oxygen molecule, two electrons are shared by each atom of oxygen.

(iv) In the formation of a N2 molecule, three electrons are shared by each atom of nitrogen.

(v) The number of single covalent bonds in a C2H2  molecule is two.

(vi) Melting points and boiling points of ionic compounds are generally higher than those of covalent compounds.


Chemistry
Science for Tenth Class - Part II - Chemistry
Standard X

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