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In the following reaction, ZnO is respec...

In the following reaction, ZnO is respectively acting as a/an
(i) `ZnO+Na_(2)O rarr Na_(2)ZnO_(2)`
(ii) `ZnO+CO_(2)rarr ZnCO_(3)`

A

acid and acid

B

acid and base

C

base and acid

D

base and base

Text Solution

Verified by Experts

The correct Answer is:
B
In (i) ZnO acts as acidic oxide (`Na_2O` is a basic oxide)
In (ii) ZnO acts as basic oxide (`CO_2` is acidic oxide)
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In the following reaction, ZnO is respectively as a/an (i) ZnO+Na_(2)O rarr Na_(2)ZnO_(2) (ii) ZnO+CO_(2)rarr ZnCO_(3)

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Identify the substance oxidised and substance reduced in the following reactions : (i) ZnO(s) + C(s) to Zn(s) + CO(g) (ii) 2Na(s) + O_(2)(g) to 2Na_(2)O(s) (iii) CuO (s) + H_(2)(g) to Cu(s) + H_(2)O(l) .

MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-COMPETITION FILE (MULTIPLE CHOICE QUESTION ((B) MULTIPLE CHOICE QUESTION FROM COMPETITIVE EXAMINATION))
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  2. When MnO2 is fused with KOH and KNO3 , a coloured compound is forme...

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  3. In the following reaction, ZnO is respectively acting as a/an (i) Zn...

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  4. Identify the cases(s) where there in change in oxidation number.

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  5. Of the following outer electronic configurations of atoms, the highest...

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  6. Which of the following pair is an amphoteric oxide ?

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  7. KMnO(4) acts as on oxidising agent in alkaline medium. When alkaline K...

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  8. Incorrect statement with reference to Ce (Z = 58).

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  9. When a mixture of solid NaCl and solid K(2)Cr(2)O(7) is heated with co...

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  10. Which of the following statement is wrong?

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  11. Maximum oxidation state of uranium and plutonium are respectively :

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  12. What is the shape and magnetic nature of permanganate ion?

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  13. The highest value of the calculated spin-only magnetic moment (in BM)...

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  14. The element that usucally dose NOT show variable oxidation states is ...

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  15. A overset(4KOH.O2)(to) underset("green")(2B ) + 2H2O 3B overset(...

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  16. Which of the following statements about the interstitial compounds is ...

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  17. Thermal decomposition of a Mn compound (X) at 513 K results in compoun...

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  18. The correct order of the first ionization enthalpies is :

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  19. The effect of lanthanoid contraction in the lanthanoid series of eleme...

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  20. The maximum number of possible oxidation states of actinoides are show...

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