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Chemistry - 9 Chapter - 5
Chemical Bonding
Test - 4
1.
SA-Why octet rule became less important?
a) Due to noble gases
b) Due to further investigation on chemical bond
c) Due to further investigation on structure of atom
d) Due to formation of periodic table
2.
Further investigation found octet rule to be less important
a) False
b) True
3.
SA-What happen when molecules of different substances approach each other?
a) They repel each other
b) They Attract each other
c) They Attract and join together or repel each other
d) They join together.
4.
SA- What happens when force of attraction between two molecules overcome force of repulsion?
a) The energy of system gets lowered
b) Their energy is lowered and both form one molecule
c) A new molecule is formed
d) Two molecules react together
5.
If the force of repulsion over come force of attraction the molecules move away.
a) False
b) True
6.
What is meant by word bond? Short..Answer............Remember.By.Heart.....................
a) The way in which one surface slips to another.
b) The way in which one surface sticks to another.
7.
SA-What is a chemical bond?
a) Two or more atoms joine together due to existence of a force of attraction between them. This forces them to react and form elements. This way compounds are formed
b) Two or more atoms joine together due to existence of a force of attraction between them. This forces them to react and form molecules. This way compounds are formed
8.
What are types of bonds?
a) coordinate covalent, ionic and metallic
b) Ionic covalent and metallic
c) Ionic, covalent and coordinate
d) Ionic, covalent, coordinate covalent and metallic
9.
Concept of chemical bond was put forth by and in?
a) Kossel and lewis in 1916
b) Kossel and lewis in 1917
c) Kossel and lewis in 1999
d) Kossel and lewis in 1981
10.
Kossel and Lewis say chemical bond is formed due to the tendency of atoms to gain?
a) To form compound
b) electronic configuration of the nearest noble gas
c) All are correct
d) To form molecule
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