Igcse endothermic and exothermic
Quiz by Jake Piner Villagonzalo
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36 questions
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- Q1Which of the following is a chemical reaction?Stirring sugar in coffeeTying a shoelaceBreaking a pencil in halfBaking soda mixed with vinegar to produce gas bubbles30s
- Q2What happens when iron reacts with oxygen in the presence of water?Iron becomes lighter in colorRust forms on the surface of the ironIron becomes magneticIron melts and evaporates30s
- Q3What type of reaction occurs when a substance changes color?Biological reactionPhysical reactionEmotional reactionChemical reaction30s
- Q4What is the product of the reaction between hydrochloric acid and sodium hydroxide?Hydrogen gasOxygen gasSalt and waterCarbon dioxide gas30s
- Q5What happens when vinegar is mixed with baking soda?Fizzing and bubbling as carbon dioxide gas is releasedThe mixture becomes warm to the touchThe baking soda dissolves completelyThe vinegar turns red in color30s
- Q6Which of the following is an example of a chemical reaction involving combustion?Mixing salt and sugar togetherBurning wood to produce heat and lightBlowing up a balloonCutting paper with scissors30s
- Q7What happens when baking powder is mixed with water?The water changes colorThe baking powder dissolves completelyThe mixture turns solidBubbles form and the mixture rises30s
- Q8What is the result of the reaction between vinegar (acetic acid) and baking soda (sodium bicarbonate)?The baking soda dissolves completely in the vinegarThe vinegar becomes hot to the touchThe mixture turns purple in colorFizzing and bubbling as carbon dioxide gas is released30s
- Q9What happens when iron (Fe) reacts with oxygen (O2) in the air?Iron oxide (rust) is formedIron evaporates into a gasIron changes color to greenIron becomes shiny and reflective30s
- Q10What happens when a light splint is inserted into a test tube of hydrogen gas?It produces a bright flash of lightIt creates a foul odorIt makes a 'squeaky pop' soundIt turns the gas yellow30s
- Q11What is the chemical symbol for hydrogen?HLiHeO30s
- Q12What type of reaction occurs when hydrogen gas reacts with oxygen gas to form water?A precipitation reactionAn acid-base reactionA combustion reactionA redox reaction30s
- Q13What is the color of hydrogen gas?YellowColorlessGreenBlue30s
- Q14What is the formula for hydrogen gas?HeHOH2Hg30s
- Q15What is the odor of hydrogen gas?PungentRotten eggsOdorlessSweet30s