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.

The process of depositing a protective layer of zinc on iron objects to prevent rusting is called:


(A)
Vulcanisation
(B)
Galvanisation
(C)
Anodising
(D)
Electrolysis
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Q2.

In the chapter 'Physical and Chemical Changes', which scientific principle governs 'Rusting of Iron and Prevention (Galvanisation)'?


(A)
Superstition and myth
(B)
Empirical evidence, conservation laws, and repeatable experimental observations in Rusting of Iron and Prevention (Galvanisation)
(C)
Aristotelian unverified claims
(D)
Random molecular movement without thermodynamics
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