Result:
1/7
1. What does the term 'hydrogen' mean?
Heavy element
Water-forming
Acidic gas
Oxygen-producing
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2/7
2. Which acid is known to be used by ants to cause a burning sensation when they bite?
Formic acid
Citric acid
Lactic acid
Carbonic acid
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3/7
3. In soap preparation, which substance is used to give color and fragrance to the soap?
Caustic soda
Sodium silicate
Perfume and dye
Stone powder
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4/7
4. Which base is primarily used in agriculture to reduce the acidity of soil?
Sodium hydroxide
Potassium hydroxide
Calcium hydroxide
Magnesium hydroxide
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5/7
5. What common household item, when mixed with turmeric, can demonstrate the presence of a base?
Vinegar
Lemon juice
Soap solution
Water
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6/7
6. Which of the following acids is used in fertilizers, paints, and dyes?
Tannic acid
Sulfuric acid
Nitric acid
Carbonic acid
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7/7
7. What color does red cabbage juice turn in the presence of a base?
Red
Green or yellow
Orange
No change