WorksheetsChemical reaction and equations
Total questions: 10
Worksheet time: 5mins
Which of the following is not a physical change?
Boiling of water to give water vapour
Melting of ice to give water
Dissolution of salt in water
combustion of Liquefied Petroleum Gas (LPG)
Which of the following gases can be used for storage of fresh sample of an oil for a long time?
carbon dioxide or oxygen
nitrogen or oxygen
carbon dioxide or helium
helium or nitrogen
The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy, is a kind of
Exothermic process
Endothermic process
Reversible process
Physical process
One of the following processes does not involve a chemical reaction. That is:
Melting of candle wax when heated
Burning of candle wax when heated
Digestion of food
Ripening of banana
The neutralization reaction between an acid and a base is a type of:
Double displacement reaction
Displacement reaction
Addition reaction
Decomposition reaction
Rusting of iron involves a chemical reaction which is a combination of:
Reduction as well as combination reactions
Oxidation as well as combination reactions
Reduction as well as displacement reactions
Oxidation as well as displacement reactions
Oxidation is a process which involves
addition of oxygen
addition of hydrogen
removal of oxygen
removal of hydrogen
A substance added to food containing fats and oils is called:
Oxidant
Rancid
Coolant
Antioxidant
The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called
Reduction
Rancidity
Corrosion
Antioxidation
Pb + CuCl2 → PbCl2 + Cu
The above reaction is an example of:
Combination
Double displacement
Decomposition
Displacement
