Language of Chemistry-IX

The short form abbreviation for the name of an element that represents one atom of an element is _____

• symbol

• formula

• equation

• valency

The short form abbreviation for a compound that represents one molecule of a compound is _____

• symbol

• chemical formula

• equation

• valency

The symbolic representation of a chemical equation having same mass of reactants and products is _____

• balanced chemical equation

• chemical formula

• chemical equation

• valency

The number of electrons gained or shared by an atom of an element during a chemical change is _____

• balanced chemical equation

• chemical formula

• chemical equation

• valency

Which all elements have variable valency?

(more than one option might be correct)

• iron

• copper

• lead

• tin

2 H and H₂ stands for ___ and ___ respectively of hydrogen

• 2 atoms

• 2 atoms and 2 molecules

• 2 atoms and 1 molecule

• 2 molecules

The formula of phosphine and ammonia is

• PH₃ and NH₃

• PH₃ and H₂S

• H₂S and NH₃

• PH₃ and NH₄

What is the formula of calcium nitride?

• Ca₃N₂

• (CH₃COO)₂Pb

• Mg₃PO₄

• Cr₂(SO₄)₃

What is the formula of lead acetate?

• Ca₃N₂

• (CH₃COO)₂Pb

• Mg₃PO₄

• Cr₂(SO₄)₃

What is the formula of magnesium phosphate?

• Mg₃(PO₄)₂

• (CH₃COO)₂Pb

• Mg₃PO₄

• Cr₂(SO₄)₃