Advertisements
Advertisements
Question
Which chemical is injected into the skin of a person during the nettle leaf hair sting?
How can the effect of this sting be neutralised?
Advertisements
Solution
During a nettle leaf hair sting, methanoic acid is injected into the skin, causing severe pain and an itching sensation. The effect of this sting can be neutralised by applying a mild base like a baking soda solution on the affected area.
APPEARS IN
RELATED QUESTIONS
Tooth decay is caused by the presence of a base.
Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?
Name one natural source of the following acid:
Tartaric acid
What colour does the turmeric paper turn when put in an alkaline solution?
One of the following is not an organic acid. This is:
What happens during a bee sting? What is its remedy?
What happens during a wasp sting? What is its remedy?
The soil in a field is highly acidic. Name two materials which can be added to this soil to reduce its acidity. Give the reason for your choice.
Which acid is used for getting chloride salt?
An hydrous hydrogen chloride is not an acid but its aqueous solution is a strong acid. Explain.
Fill in the blank
The word acid comes from latin word acidus meaning _________
Give the reaction of acid with chlorides. State the conditions under which they react.
Write the balanced equation for the preparation of the following compound (as major product) starting from iron and using only one other substance:
Iron (III) chloride
The preparation of Lead sulphate from Lead carbonate is a two-step process. (Lead sulphate cannot be prepared by adding dilute Sulphuric acid to Lead carbonate.)
Write the equation for the reaction that will take place when this first step is carried out.
Name the positive ion formed When an acid is dissolved in water.
While playing in a park, a child was stung by a wasp. Some elders suggested applying paste of baking soda and others lemon juice as remedy. Which remedy do you think is appropriate and why?
An acid is ______.
The Acid secreted in our stomach is ______.
Which one of the following acids undergoes complete ionisation?
A metal 'M' on reacting with dilute acid liberates a gas 'G'. The same metal also liberates gas 'G' when reacts with a base.
- Write the name of gas 'G'.
- How will you test the presence of this gas?
- Write chemical equations for the reactions of the metal with (1) an acid and (2) a base.
