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Which of the following statements are co...

Which of the following statements are correct?
Graphite is non-metallic, yet it conducts electricity
Iron does not react with `O_2` even on heating
Zinc can displace Fe as well as Cu from their aqueous solutions
gold cannot dissolve even in aqua-regia

A

(i) and (ii)

B

i) and (iii)

C

(i) and (iv)

D

(ii) and (iii)

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MODERN PUBLICATION-METALS AND NON-METALS-EXERCISE
  1. Which one of the following statements is incorrect?

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  2. Consider the following displacement reactions: A+BSO4rarrASO4+B C+ASO4...

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  3. Which of the following statements are correct? Graphite is non-metalli...

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  4. An essential element of amalgam is

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  5. Which of the following metal can be cut with a knife?

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  6. Why are metals used for making wires ?

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  7. The non-metal which occurs in solid at room temperature are

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  8. Rusting of iron takes place in

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  9. A metal which does not liberate hydroge gas on reaction with acids is

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  10. Silver articles turn black after a perios of time because of the forma...

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  11. In the galvanization process, iron articles are coated with

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  12. Which of the following is correct reactivity series?

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  13. Compelte the reaction: Mg(s)+H2SO4(aq)rarr

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  14. Which of the following methods is suitable for preventing an iron fryi...

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  15. Copper corrodes in moist air and changes to

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  16. Brass contains

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  17. A metal which does not liberate hydroge gas on reaction with acids is

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  18. A metal occurs in nature as its ore X which on heating in air converts...

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  19. In the reaction : Zn + FeSO4 rarr Zn SO4 + Fe

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  20. Which of the following donot react with cold as well as hot water: Fe,...

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