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10th ICSE
IMPORTANT
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The composition of aqua regia is:

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Important Questions on Metals and Non-metals

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10th ICSE
IMPORTANT
Science Chemistry>Chapter 3 - Metals and Non-metals>ASSESSMENT>Q 7

Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?

(i) Au       (II) Cu      (iii) Na    (iv) K       

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10th ICSE
IMPORTANT
Science Chemistry>Chapter 3 - Metals and Non-metals>ASSESSMENT>Q 8
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of:
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10th ICSE
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Science Chemistry>Chapter 3 - Metals and Non-metals>ASSESSMENT>Q 9
Stainless steel is a very useful material for our life. In stainless steel iron is mixed with:
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10th ICSE
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Science Chemistry>Chapter 3 - Metals and Non-metals>ASSESSMENT>Q 10
If copper is kept open in the air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of:
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 3 - Metals and Non-metals>ASSESSMENT>Q 11

Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?

 

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10th ICSE
IMPORTANT
Science Chemistry>Chapter 3 - Metals and Non-metals>ASSESSMENT>Q 12
Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 3 - Metals and Non-metals>ASSESSMENT>Q 13
Which one of the following four metals would be displaced from the solution of its salt by other three metals?
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 3 - Metals and Non-metals>ASSESSMENT>Q 14
2 ml. each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3:1 were taken in test tubes labelled as A, B, and C. A small piece of metal was put in each test tube. No change has occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be: