1. Which of the following is NOT an example of a compound?
A Gun Powder
B. Salt
C. Smoke from cars
D. Oxygen
2. Which is NOT an example of a compound?
A. Bases
B. Acids
C. Mixtures
D. Elements
3. Which of the following is NOT a group of elements?
A Metal
B. Nonmetal
C. Metalloid
D. Iron
4. Which of the following shows set of properties of an element?
A. Made up of big particles of atom.
B. Joined through chemical process.
C. Composed of one element with same properties.
D. Joined through mechanical process
5. When carbon and oxygen is combined through chemical process they will end
up producing a
A. Element
B. Compound
C. Substance
D. Acid
6. When you have 2 Hydrogen atoms combined it will end up producing a
A Mixture
B. Compound
C. Pure Substance
D. Base
7. When two different atoms combined it will be produced
A. Mixture
B. Another substance
C. Compound
D. Pure Substance
Answers
Answer:
1-d
2.-d
3-d
4.-c
5-b
6-b
7-c
I hope it's helpful to you
The questions are answered below:
1. D. Oxygen is NOT an example of a compound.
Oxygen has only one type of atom present in it, hence it is an element and not a compound.
2. D. Elements is NOT an example of a compound.
Elements cannot be broken down further while a compound can be broken down into its constituents.
3. D. Iron is NOT a group of elements.
Iron is a single element. Metal is a group of elements like sodium, magnesium, etc. A nonmetal is a group of elements like chlorine, fluorine, etc. A metalloid is a group of elements like boron, silicon, etc.
4. The following shows set of properties of an element - C. Composed of one element with same properties
Element is composed of one type of element which has the same properties.
5. When carbon and oxygen is combined through chemical process they will end up producing a B. Compound.
Carbon and oxygen combine to form carbon dioxide, which is a compound.
6. When you have 2 Hydrogen atoms combined it will end up producing a C. Pure Substance.
2 hydrogen atoms combine to form a hydrogen molecule, which is a pure substance.
7. When two different atoms combined B. Another substance will be produced.
Two different atoms will combine to form a different substance.