Class 7

Physical and Chemical Changes question bank (Science)

Practice 71 free Class 7 Science - Physical and Chemical Changes questions with answers and step-by-step solutions.

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Q1.

What practical or industrial application is directly enabled by scientific knowledge of Rusting of Iron and Prevention (Galvanisation)?


(A)
Discarding technological innovations
(B)
Halting laboratory research
(C)
Reverting to medieval tools
(D)
Innovations in healthcare, engineering, agriculture, and energy conservation derived from Rusting of Iron and Prevention (Galvanisation)
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Q2.

What practical or industrial application is directly enabled by scientific knowledge of Characteristics of Physical Changes?


(A)
Discarding technological innovations
(B)
Halting laboratory research
(C)
Reverting to medieval tools
(D)
Innovations in healthcare, engineering, agriculture, and energy conservation derived from Characteristics of Physical Changes
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