WorksheetsChemical Reactions and Equations
Total questions: 15
Worksheet time: 8mins
Which information is not conveyed by a balanced chemical equation?
Physical states of reactants and products
Symbols and formulae of all the substances involved in a particular reaction
Number of atoms/molecules of the reactants and products formed
Whether a particular reaction is actually feasible or not
Chemically rust is
hydrated ferrous oxide
only ferric oxide
hydrated ferric oxide
none of these
Both CO2 and H2 gases are
heavier than air
colourless
acidic in nature
soluble in water
What is the molecular formula for barium chloride?
BaCl2
BaCl
Ba2Cl
BaCl3
Balance the following chemical equation:
___NaBr + ___Cl2 ----> ____NaCl + ___Br2
Enter the values serially
(a)
Reactions in which energy is absorbed are known as (a) reactions.
Oxidation is the loss of electrons from a substance.
True
False
The digestion of food in the body is an example of (a) reaction.
Those reactions, in which two compounds react by an exchange of ions to form two new compounds, are called (a) reactions
A white solid when dropped in water produces a hissing sound. What the solid may be?
(a)
A magnesium ribbon burns with a dazzling flame in air and changes into a colourless substance, magnesium oxide.
True
False
The reaction between nitrogen and hydrogen to give ammonia is an example of a combination reaction.
True
False
Unbalanced reactions are also known as (a)
The number of atoms of each element is not conserved in any chemical reaction.
True
False
When Ag is exposed to air it gets a black coating of
AgNO3
Ag2S
Ag2O
Ag2CO3
