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.

Which of the following reactions are not likely to yield H₂ gas as one of the products?

I.
II.
III.
IV.

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.

The decomposition of sodium hydrogen carbonate finds its application

A. in preparation of baking powder
B. in fire extinguishers
C. as antacid
D. in fireworks

Which of the acids given below is monobasic?

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?

Directions: In the following question, two statements are given, one labelled as Assertion and the other as Reason. Examine both the statements carefully and mark the correct answer accordingly.

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.

There are two test tubes - A and B. Test tube A contains dilute hydrochloric acid and test tube B contains dilute sodium hydroxide. The two samples are tested with various indicators. Which of the following statements is true?

A Lewis acid is usually an electron deficient species which can accept a pair of electrons and form a coordinate bond. The Lewis acid among the following is

NH₃ has a lone pair of electrons on nitrogen and hence, it can be categorised as a/an

The effervescence produced on the addition of a metal to an aqueous solution of hydrogen carbonate is due to the evolution of

The reaction of zinc granules with aqueous NaOH produces

If a few drops of a concentrated acid accidentally spill over the hand of a student, what should he do?

Which among the following has the greatest concentration of H⁺ ions?

Which of the following pairs of compounds cannot co-exist in water?

The pH of 10^-6 M KOH is

Which of the following solutions has the lowest pH value?