Q1 of 53 Page 50

Do non-metals possess lustre? Give two exceptions of this property of non-metal.

Lustre means the shine which is possessed generally by all the metals. Non-metals generally do not possess any kind of lustre.

Example of non-metals which possess lustre are carbon as diamond and iodine.


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6

Write a chemical reaction for metals with dil. HCl.

 7

Name the reagent which is able to dissolve gold and platinum.

 2

Give an example of a non-metal which is

a. hardest known substance.


b. a good conductor of heat and electricity.

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Non-metals do not evolve hydrogen gas when react with water, steam or dilute acids. Why?