Name the acids and alkalis formed when each of the above three metallic(CaO, Na 2 O, K 2 O) and non-metallic oxides(SO 2 , CO 2 , P 2 O 5 ), react with water, respectively.

Non metallic oxides react with water to give acids. (i) Sulphur dioxide reacts with water to give sulphurous acid H 2 SO 3 . (ii) Carbon dioxide reacts with water to give carbonic acid H 2 CO 3 . (iii) Phosphorous pentoxide reacts with water to give phosphoric acid H 3 PO 4 . Metallic oxides react with water to gives bases. (i) Sodium oxide reacts with water to give sodium hydroxide NaOH . (ii) Potassium oxide reacts with water to give potassium hydroxide KOH . (iii) Calcium oxide reacts with water to give calcium hydroxide Ca OH 2 .

E M B I B E

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q A

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8th ICSE

IMPORTANT

Earn 100

Fill in the blank with appropriate example.

Decomposition of reactions: Electrolysis of water, _____.

Important Questions on Chemical Reactions

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8th ICSE

IMPORTANT

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q A

Fill in the blank with appropriate example.

Neutralization reactions: Mixing of caustic soda solution and hydrochloric acid, _____.

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IMPORTANT

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q A

Fill in the blank with appropriate example.

Combination reactions: Burning of magnesium wire, _____.

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IMPORTANT

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q A

Fill in the blank with appropriate example.

Exothermic reactions: Synthesis of ammonia, _____.

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IMPORTANT

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q A

Fill in the blank with appropriate example.

Displacement reactions: Reaction between iron nails and copper sulphate solution, _____.

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IMPORTANT

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q B

What is electrolysis? Write its important applications.

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IMPORTANT

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q B

Define dissociation reaction. Give some examples.

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8th ICSE

IMPORTANT

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q A

What are oxides? Give an example of each type of oxide.

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8th ICSE

IMPORTANT

Its All About Science - Chemistry>Chapter 6 - Chemical Reactions>Check Point>Q A

Name the acids and alkalis formed when each of the above three metallic(CaO, Na₂O, K₂O) and non-metallic oxides(SO₂, CO₂, P₂O₅), react with water, respectively.