7th-et: Chemica l& Physical Properties of Household Products

What is the common physical property of household products like detergent and soap?

• Solubility in water

• High boiling point

• Density in solid state

• Electrical conductivity

What chemical property is used to identify whether a household product is acidic or basic?

• Taste

• Smell

• pH test strip

• Universal pH indicator

Why is it important to know the chemical properties of household products?

• To reduce cleaning time at home

• To improve the taste of food

• To increase energy efficiency at home

• To ensure safe use, avoid dangerous reactions, and prevent accidents.

What is the difference between a chemical reaction and a physical change in a household product?

• The difference lies in that a chemical reaction changes the chemical composition of substances, while a physical change only alters their appearance or physical state.

• A chemical reaction only affects the appearance of the product

• Both processes are identical in household products

• A physical change involves a chemical reaction, but not vice versa

What physical property can be observed in a household product that is in a liquid state?

• Density

• Weight

• Transparency

• Viscosity

How can the density of a household product be determined?

• Measure the mass in grams and the volume in milliliters, then divide the mass by the volume to obtain the density in g/ml.

• Divide the volume by the mass

• Add the mass and volume without dividing them

• Multiply the mass by the volume

What chemical property is used to preserve food in household products like the refrigerator?

• Freezing

• Fermentation

• Refrigeration

• Disinfection

Why is it important to read the labels of household products in terms of their chemical properties?

• To know the chemical properties and avoid possible risks.

• To improve the taste of food.

• To increase the durability of products.

• To decorate the home in a creative way.

What is the physical property that determines whether a household product is flammable or not?

• Freezing point

• Flash point

• Melting point

• Boiling point

What chemical property is used in household products like bleach to remove stains?

• Sulfuric acid

• Hydrogen peroxide

• Sodium hypochlorite

• Chlorofluorocarbon