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WorksheetsPhysical and Chemical changes
Total questions: 15
Worksheet time: 15mins
Which among the following is a physical change?
Cutting a log of wood in small pieces
Burning of wood
Ripening of fruit
Cooking of food
Which of the following is a chemical change?
Bursting of a fire cracker
Germination of seed
Coal formation from buried trees
All of these
Changes that lead to the formation of new substances are called ………………….
(a)
A brown layer is formed when an iron article is left exposed in an open area. What is the brown layer called ?
(a)
The cooking of rice is a physical change.
True
False
Eruption of volcano is a reversible change.
True
False
Formation of clouds is a reversible change.
True
False
A Chemical change may involve:
. Change in colour only
Change in temperature only
Evolution of gas only
None of these
In which of the following statements is or are correct?
Dissolving common salt in water is a physical change
During rusting iron reacts with moist oxygen to form iron oxide
Tearing of paper is a physical change it cannot be reversed
In which of the following sentences are incorrect?
Chemical change is also called a chemical reaction.
In a chemical change it is either evolved or absorbed.
In a physical change no new substance is formed at all.
None of the above.
Which Method Is Used To Prevent Rusting?
Crystallization
Sedimentation
Galvanization
None of these
In which of the following sentences is incorrect?
Iron pipes coated with zinc do not get rusted easily.
Cutting of log of wood into pieces is a chemical change.
Condensation of steam is not a chemical change
The chemical name of baking soda is sodium hydrogen carbonate.
All of these
Paheli is writing some sentences about chemical change. choose the incorrect statement and help her?
Rusting and formation fermentation are the example of chemical change.
In this change in which the composition and chemical properties of the substance get changes.
This change is permanent and irreversible
None of the above
Consider the following sentences and choose the correct one:
Making sugar solution is a physical change
A physical change is generally reversible
Grinding of wheat grain changes its size, although it is a physical change
All the above
Paheli is writing some statement which is given by her teacher. would you help him to choose the correct statements?
Stainless steel is an alloy of iron which does not rust easily.
Cooking vessels made of copper and brass are given a coating of tin to avoid corrosion.
Galvanization process where thin coating of zinc on iron sheets to prevent rusting.
