pH Sensitivity of Plants and Animals

Q.

Give 10 examples of strong acids and weak acids?

Q.

PH of our tooth paste is ?

Q.

Bee stings can be treated with :

(a) vinegar

(b) sodium hydrogencarbonate

(c) potassium hydroxide

(d) lemon juice

Q.

One of the following does not inject an acidic liquid into the skin through its sting. that is:

(a) honey bee

(b) ant

(c) wasp

(d) nettle leaf hair

Q.

Plants grow best when the pH of soil is close to 7.

1. True

2. False

Q.

Wasp sting contains:

(a) a sugar solution

(b) an acidic liquid

(c) a salt solution

(d) an alkaline liquid

Q. Choose the correct option regarding examples of organic and inorganic acids from the following:

1. Organic acid- Citric acid, Inorganic acid- Malic acid
2. Organic acid- Malic acid, Inorganic acid- Sulphuric acid
3. Organic acid- Hydrochloric acid, Inorganic acid- Sulphuric acid
4. Organic acid- Hydrochloric acid, Inorganic acid- Malic acid

Q.

Bee sting contains:

(a) an acidic liquid

(b) a salt solution

(c) an alkaline liquid

(d) an alcohol

Q.

Which of the following statements is correct in relation to hydrochloric acid and ethanoic acid?

1. Ethanoic acid is stronger than hydrochloric acid.

2. Hydrochloric acid is stronger than ethanoic acid.

3. Both are equally strong.

4. Ethanoic acid gives more hydrogen ions than hydrochloric acid in aqueous solution.

Q. What is Taj Mahal made up of?

1. Calcium carbonate
2. Magnesium carbonate
3. Plaster of Paris
4. Silica

Q.

What is the outer cladding of Taj Mahal made up of?

1. Calcium carbonate

2. Magnesium carbonate

3. Silica

4. Plaster of Paris

Q. a chemical compound X is used as a preservative in making pickles . what is the IUPAC name of complound X

Q.

What is the pH range at which are our body functions?

1. 10 to 11

2. 13 to 14

3. 7 to 7.8

4. 2 to 3

Q.

What is the pH range at which our body works?

1. 2 to 3

2. 13 to 14

3. 7 to 7.8

4. 10 to 11

Q.

Bee-sting contains

1. Acetic acid

2. Ethanoic acid

3. Methanoic acid

4. Tartaric acid

Q.

Wasp stings can be treated with :

(a) baking soda

(b) vinegar

(c) washing soda

(d) molk of magnesia

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

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

Q.

Acid rain is formed, when the pH of rain water is ________.

1. more than 7

2. Equal to 10

3. Equal to 7

4. less than 6

Q. A substance ‘X’ reacts with a base to give a salt whose solution turns the colour of blue litmus to red. Which of the following can be ‘X’?

1. HCl
2. HNO₃
3. NaOH

Q. Arrange the following substances in the increasing order of the basicity from the top.

1. Human blood
2. Milk
3. Ammonia
4. Seawater

Q.

A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings.

What does this information tell you about the chemical nature of :

(a) wasp stings ?

(b) bee stings ?

Q.

13. Which of the following causes acid rain?

1. Carbon monoxide

2. Water vapour

3. Sulphur dioxide

4. All of these

Q.

In recent times, the white color of Taj Mahal in Agra is changing to ______ due to deposition of ______.

1. Black, emission from vehicles

2. Yellow, salts

3. Brown, iron oxides

4. All of these

Q. The acid that can be used as a hypnotic is :

1. tartaric acid
2. benzoic acid
3. barbituric acid
4. butanoic acid

Q. Bee sting contains:

1. an acidic liquid
2. a salt solution
3. an alkaline liquid
4. an alcohol

Q.

what should we do when bees sting us, what should we apply on it/

Q.

Plants grow best when the pH of soil is close to 7.

1. True

2. False

Q. What is Taj Mahal made up of?

1. Calcium carbonate
2. Magnesium carbonate
3. Silica
4. Plaster of Paris

Q. What is the cause of acid rain?

1. Non-Metal oxides in the atmosphere.
2. Metal oxides present in the atmosphere.
3. Acids present in the clouds.
4. Pollutants present in soil and water.

Q.

Plants grow best when the pH of soil is close to 7.

1. True

2. False