Acids, Bases An...

Which of the following acids is present in ant sting?

Which of the following solutions can be used to remove the odour of onion from a strip of cloth?

Which of the following statements about acids are correct?

I. Bronsted acids are proton donors.
II. Arrhenius acids furnish hydronium ions in their aqueous solutions.
III. All Arrhenius acids are also Bronsted acids.
IV. All Bronsted acids are also Arrhenius acids.

Analyse the two statements given below and select the correct option.

Statement I: When the free ends of a tester are dipped in solutions containing dilute solutions of HCl and CH₃COOH turnwise, the bulb lights up more brightly in the first case.

Statement II: HCl is a stronger acid than CH₃COOH.

According to Arrhenius concept, a base is a substance that furnishes the anion of the solvent (water). On the basis of this concept, which one of the following can be categorised as a base?

Which among the following is not an alkali?

Assertion (A): The flowers of Hydrangea plant turn pink in the presence of potassium hydroxide.

Reason (R): The flowers of Hydrangea plant are usually pink, which turn blue in the presence of a base.