MCQ Class 7 Science Chapter 5 Physical and Chemical Changes Advertisement MCQ’s For All Chapters – Science Class 7th 1. In which type of change a new substance is formed?In physical changeIn neither of theseIn both (a) and (b)In chemical changeQuestion 1 of 112. Which among the following is a physical change?Cooking of foodCutting a log of wood in small piecesBurning of woodRipening of fruitQuestion 2 of 113. Which is a method to prevent rust?GalvanisationCrystallizationSedimentationNone of theseQuestion 3 of 114. What is the formula of rust?FeOFe2O3Fe3O4None of theseQuestion 4 of 115. When carbon dioxide is passed through lime water, it turns milky due to the formation ofcalcium oxidecalcium hydroxidecalcium carbonateNone of theseQuestion 5 of 116. Galvanisation is a process used to prevent the rusting of which of the following?CopperZincIronAluminiumQuestion 6 of 117. Which of the following is an example of physical change?Boiling of waterA bud turning into a flowerRusting of ironRipening of a tomatoQuestion 7 of 118. Properties like size, shape, colour, state of a substance arephysical propertieschemical propertiesmental propertiesphysicochemical propertiesQuestion 8 of 119. Ships suffer a lot of damage from rusting in spite of being painted because:sea water is sweetsea water is soursea water contains many saltssea water is bitterQuestion 9 of 1110. When you leave a piece of iron in the open for some time, it acquires a film of brownish substance. The substance is called:rustacidbasenone of theseQuestion 10 of 1111. Which of the following changes is accompanied by sound?Explosion of fireworksPhotosynthesisSpoilage of foodNone of theseQuestion 11 of 11 Loading...
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