Metals and Non- Metals

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Metals and Non- Metals - 02

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Q1. Which of the following metals exist in their native state in nature? *

1 point

(i) Cu

(ii) Au

(iii) Zn

(iv) Na

Q2. Silver articles become black on prolonged exposure to air. This is due to the formation of - *

1 point

(a) Ag3N

(b) Ag2O

(d) Ag2S and Ag3N

Q3. Galvanisation is a method of protecting iron from rusting by coating with a thin layer of *

1 point

(a) Gallium

(b) Aluminium

(d) Silver

Q4. Stainless steel is very useful material for our life. In stainless steel, iron is mixed with - *

1 point

(a) Ni and Cr

(b) Cu and Cr

(d) Cu and Au

Q5. Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam? *

1 point

(a) FeO

(b) Fe2O3

(d) Fe2O3 and Fe3O4

Q6. If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of - *

1 point

(a) CuSO4

(b) CuCO3

(d) CuO

Q7. Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature? *

1 point

(a) Na

(b) Fe

(d) Hg

Q8. Which of the following metals are obtained by electrolysis of their chlorides in molten state ? *

1 point

(i) Na

(ii) Ag

(iii) Fe

(iv) Cu

Q9. Generally, non-metals are not lustrous. Which of the following nonmetal is lustrous? *

1 point

(a) Sulphur

(b) Oxygen

(d) Iodine

Q10. Which one of the following four metals would be displaced from the solution of its salts by other three metals? *

1 point

(a) Mg

(b) Ag

(d) Cu

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