Chemistry - 9 Chapter - 5Chemical BondingTest - 1

Chemistry - 9 Chapter - 5
Chemical Bonding
Test - 1

1. How thousands of things found in world are formed?

a) By maintaining themselves as electrons
b) By the variety of ways atoms can combine together
c) By maintaining themselves as elements
d) By creating various mixtures

2. How oxygen and nitrogen exist?

a) exist as atoms Both combine together
b) Exist as joint molecules
c) Exist as diatomic molecules O₂ and N₂

3. What is Sodium?

a) A soft silver-white metallic chemical element that reacts readily with other substances. It occurs in abundance, especially in common salts
b) A soft silver-white metallic chemical element that reacts readily with other substances. It occurs in abundance, especially in common acids

4. Sodium atoms are firmly joined together in solid sodium metal?

a) True
b) False

5. Sodium atoms are firmly joined together in liquid sodium?

a) True
b) False

6. Define Monoxide?

a) Oxide containing two oxygen atoms: a chemical compound with molecules that consist of one atom of oxygen and one or more atoms of another element
b) Oxide containing one oxygen atom: a chemical compound with molecules that consist of one atom of oxygen and one or more atoms of another element

7. Two atoms are held together in the molecules of carbon monoxide (CO)?

a) False
b) True

8. SA-Give examples that all elements (less Noble Gases), and compounds exist as combination of atoms?

a) Oxygen and nitrogen exist as diatomic molecule
b) All answers are correct
c) Two atoms are held in molecules of Carbon Monoxide
d) Sodium atoms are joined together in solid sodium matel

9. The attractive force, which keeps the atoms together, is called?

a) Chemical bond
b) Repulsive force
c) Two answers are correct
d) Chemical force

10. SA-Why atoms combine together?

a) It decreases stability of atoms
b) Have tendency to lower Energy and increase Stability
c) It increase size of atom
d) Have tendency to increase their energy

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