Question 1

Which of the following is an example of a compound?

Accepted Answer

Water

Answer

Oxygen

Answer

Carbon

Answer

Helium

Question 2

Which of the following is an example of an element?

Accepted Answer

Oxygen

Answer

Sugar

Answer

Salt

Answer

Water

Question 3

What is the chemical symbol for hydrogen?

Accepted Answer

H

Answer

O

Answer

He

Answer

C

Question 4

What are the elements in the chemical formula CO2?

Accepted Answer

['Carbon', 'Oxygen']

Answer

['Sodium', 'Chlorine']

Answer

['Hydrogen', 'Oxygen']

Answer

['Calcium', 'Phosphorus']

Question 5

What are the elements in the chemical formula NaCl?

Accepted Answer

['Sodium', 'Chlorine']

Answer

['Calcium', 'Phosphorus']

Answer

['Carbon', 'Oxygen']

Answer

['Hydrogen', 'Oxygen']

Question 6

What are the elements in the chemical formula NaOH?

Accepted Answer

['Sodium', 'Oxygen', 'Hydrogen']

Answer

['Calcium', 'Phosphorus']

Answer

['Hydrogen', 'Oxygen']

Answer

['Carbon', 'Oxygen']

Question 7

What is the minimum number of elements present in a chemical formula?

Accepted Answer

2

Answer

8

Answer

4

Answer

6

Question 8

In a chemical formula, how many elements are present in the compound CaCO3?

Accepted Answer

3

Answer

4

Answer

1

Answer

2

Question 9

How many elements are present in the chemical formula CH3COOH?

Accepted Answer

3

Answer

2

Answer

1

Answer

4

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