Language of Chemistry

What is the valency of lead ?

• 1,2

• 5,7

• 2,4

• 1,4

True or False: Law of conservation of energy states that matter can neither be created nor destroyed

• True

• False

The valency of Chlorine in AlCl₃ is

• 1

• 3

• 2

The molecular formula for Ammonium carbonate is

• (NH₄ )₂CO₃

• (NH₄ )CO₃

• (NH₄ )₂CO

What is the name of 13th element

(a)  

Formula of baking soda

• NaHCO3

• Nacl

• H2SO4

How many valence electrons are in an atom of Ar?

• 2

• 8

• 4

• 1

valency of chloride ion is

• 0
• +1
• -1
• 2

What is the molecular formula of acetic acid

(a)  

sugar formula ?

• K₂CO₃

• Na₃PO₄

• C₁₂H₂₂O₁₁