Class 5 Science Chapter 5 Test 2 Welcome to your Class 5 Science Chapter 5 Test 2 Name Email 1. The _______ develops during combustion reaction. Respiration Reproduction Decomposition Flame 2. To prevent iron from _______, its surface is painted with oil or chromium. Reproduction Rusting Decomposition All of these 3. The _______ change cannot be reversed. Physical Chemical Melting Freezing 4. In a solution, the substance that dissolves a solute, and is in more quantity is called a _______. Solute Solvent Solution All of these 5. What type of change is it when metal expands on heating? Permanent Chemical Physical Irreversible 6. _______ change can be reversed. Physical Chemical Melting Freezing 7. When salt is dissolved in water, the water is Solute Solvent Solution All of these 8. The change of milk into yogurt is. Physical change Climate change Chemical change Change of color 9. The remains of dead organisms and waste matters disappear gradually through _______. Respiration Reproduction Decomposition All of these 10. When the flame develops during combustion reaction, then it is called _______. Respiration Reproduction Decomposition Burning 11. The change that occurs on the iron due to the action of oxygen and water is called _______. Rusting Reproduction Decomposition All of these 12. The process in which bacteria and fungi decompose the dead bodies into simple components is called _______. Respiration Reproduction Decaying All of these 13. When salt is dissolved in water, the salt is ______ Solute Solvent Solution All of these 14. A solution having major quantity of solute is called _______ solution. Dilute Concentrated Chemical Physical 15. A change which results into a totally new material is called _______ change. Physical Chemical Melting Freezing 16. The change in which both appearance and composition so substance or matter changes are called _______ change. Dilute Concentrated Chemical Physical 17. Burning of paper is a _______ change. Physical Chemical Melting Freezing 18. In a solution, the substance that dissolves in liquid and is in less quantity is called a _______. Solute Solvent Solution All of these 19. When solid or liquid things put into water and its particles dissolves uniformly to form a mixture called _______. Solute Solvent Solution All of these 20. Iron + oxygen = _______ Steel Aluminum Rusting Gold 21. Which factor will NOT affect the dissolving of sugar in water? To add salt in water To make sugar powdered by grinding To heat water and sugar To stir water and sugar 22. There are _______ important components of solution. Two Three Four Five 23. A solution having minor quantity of solute is called _______ solution. Dilute Concentrated Chemical Physical 24. The rate of dissolving salt in water can be increased by: Stirring Increasing temperature Decreasing the size of particles All of these 25. Why a person painted his iron gate? To save from rusting To save from sunlight To make it beautiful To save from water 26. Which one is NOT a chemical change? Seed germination Making paper boat Burning of wood Cooking food 27. A change in which no new material is formed with different properties then such change is called a _______ change. Physical Chemical Melting Freezing Time is Up! Time's up
