Result:
1/10
1. What is a common use of citric acid?
Preserving leather
Making drinks
Dyeing cloth
Manufacturing soap
2/10
2. Which base is commonly used in the manufacture of soap and rayon?
Sodium hydroxide
Calcium hydroxide
Potassium hydroxide
Magnesium hydroxide
3/10
3. What is added to soap during preparation to increase its hardness and quantity?
Vinegar
Stone powder
Baking powder
Salt
4/10
4. Which natural substance acts as an indicator of bases by changing color when in contact with a base?
Red cabbage
Turmeric
Hibiscus
Blueberries
5/10
5. When turmeric is exposed to a base, what color does it typically turn?
Blue
Green
Reddish-brown
Yellow
6/10
6. Which of the following plants has a natural color that can be used to identify acids and bases?
Red spinach
Mango
Apple
Banana
7/10
7. What ingredient in soap preparation should not be touched with bare hands due to its caustic nature?
Coconut oil
Sodium silicate
Caustic soda
Stone powder
8/10
8. Which acid is commonly used in the leather and ink industries?
Tannic acid
Acetic acid
Carbonic acid
Nitric acid
9/10
9. What is the purpose of using aluminum hydroxide and magnesium hydroxide in medicines?
To relieve pain
To reduce fever
To neutralize stomach acid
To enhance immunity
10/10
10. What property of hydrogen makes it suitable for use in balloons and rockets?
It is dense
It is heavy
It is the lightest gas
It is easily compressed