ionic equilibrium

A solution whose pH value is less than 7 will be

• Basic

• Neutral

• Acidic

• Buffer

pKa values of two acids A and B are 4 and 5. The strengths of these two acids are related as

• Acid A is 10 times stronger than acids B

• The strengths of the two acids can not be compared

• Acid B is 10 times stronger than acid A

• Strength of acid A : strengtha of acid B = 4 : 5

An aqueous solution of CH3COONa will be

• None of these

• Alkaline

• Acidic

• Neutral

Which of the following statement is true?

• The base and its conjugate acid react to form a neutral solution

• The conjugate base of a weak acid is a weak base

• The conjugate base of a weak acid is a strong base

• The conjugate base of a strong acid is a strong base

The pH of water at 25oC is nearly

• 12

• 10

• 7

• 4

According to Bronsted-Lowry concept, base is a substance which is

• An electron pair donor

• An electron pair acceptor

• A proton donor

• A proton acceptor

Which is incorrect for buffer solution?

• There is no change is pH value when acid and base is mixed

• It contains strong acid and its conjugate base

• It contains weak acid and its conjugate base

• It contains weak base and its conjugate acid

The solubility of AgI in NaI solution is less than that in pure water because

• Solubility product of AgI is less than that of NaI

• Of common ion effect

• AgI forms complex with NaI

• The temperature of the solution decreases

According to Bronsted law, water is a/an

• Acid and base both

• acid

• base

• salt

Ammonia gas dissolves in water to give NH4OH. In this reaction water acts as

• A conjugate base

• A base

• A salt

• An acid