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Choose the most appropriate answer from the following options :
Identify the metallic oxide which is amphoteric in nature :

Calcium oxide
Barium oxide
Zinc oxide
Copper(ll)oxide

A

`Na2O`

B

`SO_2`

C

`B_2O_3`

D

ZnO

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The correct Answer is:
D
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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-I)(OBJECTIVE QUESTIONS)(THE CORRECT ALTERNATIVE FROM THE CHOICES GIVEN : )
  1. Set of elements known as chalcogens is : 1) O, S, Se, 2) CI, Br, I...

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  2. The electronic configuration of chalcogens is : 1) ns^2np^2 2) ns...

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  3. Choose the most appropriate answer from the following options : Iden...

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  4. Increasing order of boiling points is: 1) H2O gt H2S gt H2Se gt H2Te...

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  5. The compound which gives off oxygen on moderate heating is

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  6. O2 molecule is

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  7. The element having maximum catenation property is

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  8. Oxygen exhibits positive oxidation state in

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  9. On addition of conc. H2SO4 to a chloride salt, colourless fumes are ev...

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  10. In qualitative analysis, when H2S is passed through an aqueous solutio...

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  11. In a cyclotrimetaphosphoric acid molecule, how many P-Osingle and doub...

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  12. Which of the following elements can be involved in p pi-d pi bonding?

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  13. Which of the following pairs of ions are isoelectronic and isostructur...

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  14. Affinity for hydrogen decreases in the group from fluorine to iodine. ...

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  15. Bond dissociation enthalpy of E-H (E = element) bonds is given below. ...

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  16. On heating with concentrated NaOH solution in an inert atmosphere of C...

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  17. Which of the following acids forms three series of salts?

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  18. Strong reducing behaviour of H(3)PO(2) is due to

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  19. On heating, lead nitrate forms oxides of nitrogen and lead. The oxides...

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  20. Which of the following elements does not show allotropy?

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