Understanding Bases and Alkalis

What is an alkali?

• A base that is insoluble in water

• A basic hydroxide of a metal that is soluble in water

• A neutral compound

• An acidic compound

Which of the following is true about alkalis?

• All bases are alkalis

• All alkalis are bases

• Alkalis are neutral

• Alkalis are acidic

What is the main difference between a base and an alkali?

• All bases are soluble in water

• All alkalis are insoluble in water

• All alkalis are bases, but not all bases are alkalis

• All bases are alkalis, but not all alkalis are bases

Which of the following is an example of a base that is not an alkali?

What determines the strength of an alkali?

• Its color

• Its ability to produce hydroxyl ions

• Its taste

• Its smell

What percentage of dissociation makes an alkali strong?

• Less than 10%

• More than 30%

• Exactly 50%

• Less than 30%

What is a concentrated alkali?

• An alkali with a low amount of alkali dissolved in water

• An alkali with a high amount of alkali dissolved in water

• An alkali that is insoluble in water

• An alkali that is neutral

Which of the following is an example of a concentrated alkali?

• Dilute sodium hydroxide

• Concentrated sodium hydroxide

• Dilute potassium hydroxide

• Dilute calcium hydroxide

What is a dilute alkali?

• An alkali with a high amount of alkali dissolved in water

• An alkali with a low amount of alkali dissolved in water

• An alkali that is insoluble in water

• An alkali that is neutral

Which of the following statements is true about sodium hydroxide?

• It is a weak alkali

• It is a strong alkali irrespective of its concentration

• It is neutral

• It is acidic