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Although metals from basic oxides, which...

Although metals from basic oxides, which of the following metals form an amphoteric oxide?

A

Na

B

Ca

C

Al

D

Cu

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MODERN PUBLICATION-METALS AND NON-METALS-EXERCISE
  1. Generally, metals are solid in nature. Which one of the following meta...

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  2. Reaction between X and Y forms compound Z. X loses electron and Y gain...

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  3. Although metals from basic oxides, which of the following metals form ...

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  4. Which of the following non-metals is a liquid?

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

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  6. Which of the following reactions cannot occurs?

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  7. Chemical formula of cryolite is

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  8. Which of the following is the sulphide ore of copper?

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  9. True/false Gold dissolves in aqua regia.

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  10. T/F Rust is Fe2O3. xH2O

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  11. Sulphide ores are concentrated by froth floatation process.

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  12. True/false the alloy invar contains iron and aluminium.

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  13. Can copper displace iron from iron sulphate solution? Give reasons.

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  14. The rockey material found with ores is known as…………….

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  15. Fill ups Most oxides of metal are………………in nature.

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  16. Fill ups the percentage of gold in 22 carat gold is………….. .

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  17. Fill ups In galvanisation iron is protected by the coating of………….. .

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  18. In the electrorefining of copper,some gold is deposited as:

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  19. Why ae metals called electropositive elements and non-metals called el...

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  20. Which of the two metals copper and silver is more reactive?

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