Question

17. A pure substance consists of a single type of particles. All the elements and compounds are pure substances. A mixture is an impure form of substance. It contains two or more pure substances mixed together. Mixtures are of two types : 1.) Homogenous mixtures 2.) Heterogenous Mixtures. All the solutions are homogenous mixtures whereas colloids and suspensions are heterogenous mixtures. Answer the following questions as per the case above. i) Which of the following is a pure substance : 1 point Magnesium hydroxide Air Milk Vinegar ii) A mixture of iodine and alcohol is: 1 point homogenous and shows Tyndall effect heterogenous and shows Tyndall effect heterogenous and does not show Tyndall effect homogenous and does not show Tyndall effect iii) Select the correct statement which holds good for sodium chloride I) It shows the properties of its constituents II) It contains only one kind of particles III) It does not have a fixed melting point IV) It has a fixed composition 1 point I) and II) II) and IV) II) and III) I) and IV)


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Answer 1

Explanation:

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