Question

Classify the following substances as an element, a mixture and a compound: i. Limestone ii. Antimony iii. Sugar iv. Gold v. Urea vi. Soil vii. Neon viii. Air ix. Milk x. Soap

Answer 1

Explanation:

urea, neon, gold, limestone,Sugar,Antimony are compound,

Air,Soap,Milk,soil are Mixtures

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Answer 2

Explanation:

What do you understand by physical change

and chemical change? Classify the following as

physical or chemical changes :

(i) Dissolving salt in water

(ii) Electric current is passed through water and

it is broken down into hydrogen and oxygen

(iii) Evaporation of alcohol

(iv) Digestion of food

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