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When copper powder is heated 'CuO' would...

When copper powder is heated `'CuO'` would be formed. What type of colour changes do you notice?

A

black to brown

B

brown to yellow

C

brown to black

D

yellow to brown

Text Solution

Verified by Experts

The correct Answer is:
C
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VGS PUBLICATION-BRILLIANT-CHEMICAL REACTIONS AND EQUATIONS-OBJECTIVE TYPE QUESTIONS
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  2. What do you observe when lead nitrate powder is heated in a boiling tu...

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  3. What will you observe when Pb(NO(3))(2) is added to KI in a test tube?

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  4. What will you notice when Na(2)SO(4) is added to BaCl(2) in a test tub...

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  5. When copper powder is heated 'CuO' would be formed. What type of colou...

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  6. Match the colours of the given substances. {:("1) "2Fe(2)O(3),"A) Bl...

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  7. Which apparatus do we need to decomposes AgCl(2)?

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  8. C(6)H(12)O(6)rarr C(2)H(5)OH+CO(2) is ……………..chemical reaction.

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  9. The iron nail dipped in Copper Sulphate solution becomes brown and the...

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  10. The process of preparing slaked lime by adding water to quicklime is t...

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  11. Zn+2HCl rarr ZnCl(2)+H(2) is an example for ……………….

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  12. If the gas liberated in an experiment allows the burning splinter to c...

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  13. The reaction that takes place when quicklime is added to water is …………...

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  14. Which of the following combination is wrong ?

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  15. 2PbO+Crarr 2Pb +CO(2) Which of the following statements are correct ...

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  16. Why food materials are packed in air tight containers ?

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  17. Flush bags contains potato chips filled with ………..

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  18. Which of the following is an oxidation process observed in daily life ...

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  19. Al((s))+Fe(2)O(3(s))rarrAl(2)O(3(s))+Fe((s)) 54((g))+160(g)rarr 102g...

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  20. 10 g of hydrogen contain ……………… molecules. If 2g of hydrogen contain 6...

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