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Among the following statements, the inc...

Among the following statements, the incorrect one is

A

Calamine and siderite are carbonate ores

B

Argentite and cuprite are oxide ores

C

Zinc blende and pyrites are sulphide ores

D

Malachite and azurite are ores of copper.

Text Solution

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The correct Answer is:
B
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RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Additional Problems for Self practice (APSP)
  1. If a non-metal is added to the interstitial sites of a metal then the ...

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  2. The pair of compounds in which the metals are in their highest oxidati...

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  3. Among the following statements, the incorrect one is

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  4. A compound of iron exists as a dimer in vapour state. It is hygroscopi...

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  5. Fe is made passive by :

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  6. Which one of the following dissolves in hot concentrated NaOH?

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  7. Hot copper wire reacts with oxygen to produce:

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  8. A compound is yellow when hot and white when cold. The compound is:

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  9. At 300 C FeCl(3):

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  10. When FeSO(4) is strongly heated, the number of acidic gases produced i...

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  11. On heating ZnCl(2).2H(2)O, the compounds obtained is:

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  12. On heating KMnO(4), one among the following is not formed:

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  13. Reaction of KMnO(4) in neutral or very weakly alkaline solution can be...

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  14. KMnO(4) in excess on treatment with concentrated H(2)SO(4) forms a com...

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  15. Which of the following statement is wrong?

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  16. The image on an exposed and developed photographic film is due to

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  17. The yellow colour solution of Na2CrO4 changes of orange red on passin...

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  18. What happens when a molten mixture of K(2)FeO(4) and K(2)CrO(4) is aci...

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  19. Why silver chloride is used in photochromic spectacles?

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  20. In which of the following reactions, reaction of silver with the given...

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