What is meant by Amphoteric?

A molecule or ion that can react as an acid and a base.

Able to breathe both in water and on land.

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iGCSE - Chemistry paper 3 - Acids and Bases

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1What is meant by Amphoteric?
1. AA molecule or ion that can react as an acid and a base.
2. BAble to breathe both in water and on land.
3. CA substance with pH < 7
2Acids react with metals to form salts
1. AVerdadero
2. BFalso
3What kind of Indicator turns yellow in alkali?
1. ALitmus
2. BPhenolpthalein
3. CMethyl orange
4pH value for a strong acid?
1. A1-2
2. B12-14
3. C7
5Which of these is NOT an example of a base
1. AMetal oxides
2. BHydroxides
3. CNitrates
4. DAmmonia
6Bases neutralise acids, forming a ______ and ______
1. ASalt, Water
2. BSalt, Hydrogen
3. CSalt, Oxygen
7Reacting a base with an ammonium compound (an example of a base reaction) gives ammonia as a product as well as salt and water
1. AVerdadero
2. BFalso