Uses of Acids and Bases

Q. What is a strong acid?
what is a weak acid?

Q.

Name the acid present in ant sting and give its chemical formula. Also, give the common method to get relief from the discomfort caused by the ant sting.

Q.

Is baking soda a base or a salt? Give reason.

Q. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator

Q.

Which acid is present in tamarind?

Q.

The acid which is used in pickles is

1. Citric acid

2. Acetic acid

3. Sulphuric acid

4. Tannic acid

Q.

Does Gold Dissolve In Nitric Acid?

Q.

Why does a base applied to your skin and relief from an ant bite?

Q.

Toilet cleaners use which of the following property of acids?

1. They are corrosive in nature

2. They have fruity smell

3. They are sour in taste

4. None of the above

Q.

Which of the following is used to dissolve gold?

1. Hydrochloric acid

2. Sulphuric acid

3. Nitric acid

4. Aqua Regia

Q.

If you spill a chemical toilet cleaning liquid on your hand, your first aid would be:

1. Aqueous NH₃

2. Aqueous NaHCO₃

3. Aqueous NaOH

4. Vinegar

Q. Which acid is used for the manufacture of fertilizers and explosives?

1. Sulphuric acid
2. Phosphoric acid
3. Hydrochloric acid
4. Nitric acid

Q.

Which of the following acids is present in tamarind?

1. Nitric acid

2. Citric acid

3. Tartaric acid

4. Hydrochloric acid

Q.

________ is present in our stomach and helps in digestion of food.

1. Tartaric acid

2. Sulphuric acid

3. Hydrochloric acid

4. Formic acid

Q.

Question 19

Fill the blanks in the following sentences
(a) Lemon juice and vinegar taste ___ because they contain ___
(b) Turmeric and litmus are ___acid-base indicators.
(c) Phenolphthalein gives___colour with lime water
(d) When an acidic solution is mixed with a basic solution, they___ each other forming a and water.

Q.

Tooth decay is caused by the presence of a base.

1. True
2. False

Q. Which chemical do we apply on the skin at the bee sting site?

Q. Is bleaching powder a base?

Q.

Organic matter is usually added to soil. Why?

1. decrease the alkalinity of the soil.

2. increase the acidity of the soil.

3. decrease the acidity of the soil.

4. increase the alkalinity of the soil.

Q. When a toilet cleaner is acidic then why do they it burn things when we use it for cleaning sanitary wares

Q.

Name a natural source of tartaric acid. [1 MARK]

Q. Write three uses of acids. [3 MARKS]

Q.

Give the name of two diacidic base and their uses.

Q.

The acid(s) which is/are used in the manufacture of chemical fertilizers is/are

1. Nitric acid

2. Citric acid

3. Sulphuric acid

4. Tannic acid

Q.

It is very interesting to know that our body is made up of various acids. Each cell in our body contains acids. Can you think of an acid which is present in every cell and controls our looks, the colour of our eyes, our height and so on?

1. Hydrochloric acid

2. Deoxyribonucleic acid (DNA)

3. Fatty acids

4. Amino acids

Q.

Explain why?
a)Calamine solution is applied on the skin when an ant bits.
b)Factory waste is neutralized before disposing it into water bodies. [5 MARKS]

Q.

The sting of the ant contains which of the following?

1. Citric acid

2. Calcium hydroxide

3. Formic acid

4. Sodium hydroxide

Q.

Which of the following fluids in a healthy body has acidic in nature?

1. Blood

2. Saliva

3. Gastric juice

4. Urine

Q.

Which of the following hydroxide is not an alkali? Mg(OH)₂, NaOH, KOH, NH₄OH₄

Q.

For tooth decay to occur, the pH level of the mouth should be below____.