Changes to Materials

From material properties below, which one indicates the ability of a substance to be burned?

• Flammability

• Toxicity

• Conductivity

• Melting point

What is the product of the reaction between acid and metal?

• Salt and Water

• Salt and H₂

• Water and metal

• CO₂ and H₂O

What is the color of universal indicator if we dissolve it inside a strong acid?

• Purple

• Blue

• Green

• Red

What is the pH of a neutral solution?

• 0

• 5

• 7

• 10

To neutralize acid in our stomach when we get stomachache, what should we consume?

• Shampoo

• Chalk

• Antacid

• Fertilizer

The melting point of sodium metal is 97 °C while the melting point of Potassium is 63,5 °C. If I heat a container which contains those two metals from room temperature to 80 °C, what will happen?

• Nothing will happen

• Potassium will melt while Sodium stays solid

• Sodium will melt while Potassium stays solid

• Both of them will melt

If we want to measure the temperature of our mixture after the reaction takes place, what is the tool that we need to use?

• Stopwatch

• Measuring cylinder

• Thermometer

• Scale

When we put baking soda inside a transparent solution, a gas is given of. From that information, what kind of solution is that?

• Acid

• Neutral

• Alkaline

• Basic

What is the name of this tool?

• Beaker

• Erlenmeyer flask

• Test tube

• Burette

Take a look at the table. From that information, which one is the most acidic from those sample?

• A

• B

• C

• D