Chemical Reactions Quiz
Authored by ankathi venkanna
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21 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 2 pts
When Lead Nitrate reacts with potassium iodide, what yellow precipitate is formed?
PbIO3
Pb(NO3)2
KNO3
PbI2
2.
MULTIPLE CHOICE QUESTION
10 sec • 2 pts
Which of the following is not a chemical reaction?
Digestion of food in our body
Dissolution of sugar in water
Rusting of iron
Souring of milk
3.
MULTIPLE CHOICE QUESTION
10 sec • 2 pts
Which of the following is not a thermal decomposition reaction?
2H2O→2H2 + O2
2KClO3→2KCl + 3 O2
ZnCO3→ZnO + CO2
2FeSO4 →Fe2O3 +SO2 + SO3
4.
MULTIPLE CHOICE QUESTION
10 sec • 2 pts
Combustion is an ................. process?
Endothermic
Exothermic
None of the above
Both (a) and (b)
5.
MULTIPLE CHOICE QUESTION
10 sec • 2 pts
What is the formula of rust?
Fe3O4.nH2O
Fe2O3
Fe3O4
Fe2O3.nH2O
6.
MULTIPLE CHOICE QUESTION
10 sec • 2 pts
Copper reacts with air and moisture to develop a green layer which is chemically?
Copper sulphate
Basic Copper carbonate
Copper Nitrate
Copper Oxide
7.
MULTIPLE CHOICE QUESTION
10 sec • 2 pts
What gas is produced when water decomposes?
Oxygen
Nitrogen
Carbon Dioxide
Hydrogen
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