WorksheetsPhysical and Chemical Changes
Total questions: 15
Worksheet time: 8mins
Bursting of crackers is a Chemical change
True
False
What increases the speed of rusting?
water
Paint
Salt water
None of these
Which is the best process of obtaining large sugar crystals from sugar solution?
Evaporation
Crystallisation
Chlorination
None of these
Best method to prevent rusting is
Galvanisation
Greasing
Applying oil
Painting
Mixing of eggs, oil, refined flour is a
Physical Change reversible
Chemical Change reversible
Physical Change irreversible
Chemical Change irreversible
What is the chemical form of Copper Sulphate?
CuSo4
H2So4
HcL
NaCL
What is produced when CO2 is passed through Ca(OH)2?
MgO
CaCo3
CaO
None of these
What is the chemical form of Rust?
Fe2O3
Fe2O2
FeO
None of these
Burning of wax is a __________ change.
Physical reversible
Physical irreversible
Chemical
None of these
In which activity is GAS produced?
CuSo4 and Fe
Mg and O2
Acetic acid and Sodium Hydrogencarbonate
None of these
What change is expected in CuSo4 and Fe?
Green→Blue with copper
Blue→Green with copper
Red→Yellow with copper
Yellow→Red with copper
What happens when magnesium ribbon burns?
Burns with dull white light
Burns with bright white light
Burns with dull yellow light
Burns with green light
None of these
What is an Aqueous solution?
Solution made with solvent as milk
Solution made with solvent as juice
Solution made with solvent as oil
Solution made with solvent as water
What do you coat with in the process of Galvanisation?
Chromium
Zinc
Copper
Carbon
Name the non-metal used in making stainless steel
Manganese
Nickel
Carbon
Chromium
