pH of Self Defence by Animals and Plants

Q. Question 34.
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.

Why does Bee sting cause pain and irritation rubbing of baking soda on sting areas gives relief how

Q.

Explain why: Calamine solution is applied on the skin when an ant bites.

Q.

(a) What happens during a bee sting? What is its remedy?

(b) What happens during a wasp sting? What is its remedy?

Q.

(a) Why is it wrong to treat a bee sting with vinegar?

(b) Why is it wrong to treat a wasp sting with baking soda solution?

Q. The sting of ants and bees contain ________.

1. common salt
2. acetic acid
3. formic acid
4. vinegar

Q. Name the acid which is present in tamarind juice?

Q. The products obtained during the reaction of sodium nitrate with sulphuric acid above ${200}^{0}C$ are _____________.

1. sodium hydrogen sulphate and nitric acid
2. hydrogen, water and sodium sulphate
3. sodium sulphate, water and sulphuric acid
4. sodium sulphate and nitric acid

Q.

Will sugar kill plants?

Q.

You are advised to rub soap over the wound caused by the sting of ants or bees. Explain it

Q. Question 34.
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.

While playing in a park, a child was stung by a wasp. Some elders suggested applying a paste of baking soda and others lemon juice as remedy. Which remedy do you think is appropriate and why?

Q.

What is the most corrosive liquids?

Q.

Chemically, salts are the products of neutralisation reactions between acids and bases. These are classified as normal, acidic or basic salts depending upon the extent of neutralisation whether complete or incomplete. Generally, salts can be synthesised in the laboratory as well as prepared commercially. However, many of these exist in nature e.g. Gypsum $({\mathrm{CaSO}}_4·2{\mathrm{H}}_2\mathrm{O})$. Rock salt or sodium chloride (NaCl), Dolomite $({\mathrm{CaCO}}_3·{\mathrm{MgCO}}_3)$, Bauxite$({\mathrm{Al}}_2{\mathrm{O}}_3·{\mathrm{xH}}_2\mathrm{O})$etc. Excessive intake of which salt can lead to high blood pressure?

Q. In case of an ant bite which of the following should be applied on the bite to get relief?

1. Salt
2. Base
3. Water
4. Acid

Q.

While playing in a park, a child was stung by a wasp. Some elders suggested applying a paste of baking soda and others lemon juice as remedy. Which remedy do you think is appropriate and why?

Q. The sting of ants and bees contain ________.

1. vinegar
2. common salt
3. acetic acid
4. formic acid

Q. The sting of ants and bees contain ________.

1. formic acid
2. vinegar
3. common salt
4. acetic acid

Q.

Which chemical is injected into the skin of a person :

(a) during an ant's sting ?

(b) during the nettle leaf hair sting ?

How can the effect of these stings be neutralised ?

Q. Give reason why Baking soda should be rubbed on bee-stung area ?

Q. The sting of ants and bees contain ________.

1. formic acid
2. vinegar
3. common salt
4. acetic acid

Q. It has been found that rubbing vinegar on the stung area of the skin of a person gives him relief. The person has been stung by:
(a) wasp
(b) ant
(c) honey bee
(d) nettle leaf hair