Question

When an ant stings a person,solution K is rubbed on the stung area of the skin to get relief from the pain. The substance K is also used in kitchen purposes. Another substance L is sour in taste and contains an organic acid M. It is pungent smelling and is used as a preservative in foods. When a solution K is mixed with L, then a change N takes place to produce bubbles of gas O.

a. Identify K.
b. What is substance L?
c. Name the acid M.
d. What type of change is N?
e. Name the gas O.​

Answer 1

Answer: Corrected Question

When an ant stings a person,solution K is rubbed on the stung area of the skin to get relief from the pain. The substance K is also used in kitchen purposes.Another substance M is sour in taste and act as an organic acid.When a solution K is mixed with M, then compound L is formed the change takes place N to produce bubbles of gas O.

Explanation:

Kindly change the question your question is wrong kind change it and present it as above.

a) K is baking soda

b) M is acetic acid or vinegar

c) L is Sodium acetate

d) Chemical Change

e) Carbon-di-oxide gas

Answer 2

The answers are as follows-

a. Substance K is- Baking soda.

• The ant sting contains methanoic acid due to which we feel burning pain. The rubbing of affected skin with a mild base such as baking soda neutralises the effect of antacid.
• To treat ant bites, baking soda is the most commonly used substance as it is easily available in the kitchen.

b. Substance L is- Vinegar.

• Vinegar contains organic acid and hence, it is sour in taste. It is widely used in the kitchen as it increases the food taste.
• It is also used as a natural preservative as it prevents food from spoilage.

c. M is an- Acetic acid.

• Vinegar contains acetic acid that kills microbes and thus, prevents the spoiling of food. Hence, it acts as a natural preservative.

d. N is a- Chemical change.

• During a chemical change, the formation of one or more substances takes place. It can be confirmed by the change of colour, odour, evolution of gas etc.
• When a solution of baking soda (sodium bicarbonate) is mixed with vinegar (acetic acid), the chemical change takes place.
• This is confirmed by the evolution of gas.

e. Gas O is- Carbon dioxide.

• When baking soda is mixed with vinegar, sodium acetate and water is formed with the evolution of carbon dioxide.
• Due to chemical change, bubbles of carbon dioxide gas are produced.