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Assertion (A) : Gold is available in nat...

Assertion (A) : Gold is available in nature in free state. Reason (R) : High reactive metals are available in free state.

A

'A' and 'R' are true and 'R' satisfies 'A’

B

'A' and 'R' are true but 'R' doesnot satisfy 'A

C

'A' is true but 'R' is false

D

'A' and 'R' are false

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VGS PUBLICATION-BRILLIANT-PRINCIPLES OF METALLURGY-EXERCISE
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  2. The main use of CaCl2 in laboratory is

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  3. Assertion (A) : Gold is available in nature in free state. Reason (R) ...

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  4. Metals are available in: i) free state ii) mixed state.

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  5. Assertion (A) : Bauxite is ore for Aluminium metal. Reason (R) : The m...

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  6. Assertion (A) : Oxygen - sulpher group in the periodic table is called...

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  7. The correct steps of process of metallurgy is i) purification of the m...

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  8. P: Extraction of the metal from Its ores depends on the physical prope...

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  9. Which of the following reduction is suitable for extraction of crude m...

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  10. P: Corrosion of iron is an oxidation process. Q : Corrosion occurs in...

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  11. Assertion (A) : Alloy metal does not undergo corrosion, Reason (R) : A...

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  12. Assertion (A) : Zn can be obtained by distillation method. Reason (R) ...

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  13. The product in the reduction of PbO with carbon is

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  14. What will happen if the displacement reaction takes place in between T...

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  15. What will happen if cinnabar heats ?

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  16. What will happen if a stainless steel rod placed in moisture air ?

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  17. There is metal oxide on a tool. The tool is made with

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  18. Two test tubes. 'A' and 'B' contains iron nails. In 'A' test tube iron...

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  19. Extract Na from NaCl, we obtain Na at

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  20. i) Bauxite (Al2O3 * 2H2O) ii) Copper iron pyrites (CuFeS2) iii) Gypsum...

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