Symbols of Elements

Q.

$\mathrm{Cr}$ is the chemical symbol for chromium

1. True
2. False

Q. [TBQ.3]
What are the molecular formulae of the following compounds?

• Hydrochloric acid
• Sulphuric acid
• Sodium chloride
• Glucose
• Methane

Q. Identify the correct pairs.

1. Carbon dioxide - compound, gold - compound
2. Gold - element, water - compound
3. Iron - compound, carbon dioxide - element
4. Iron - element, water - element