MCQ
Given below are two statements:

Statement $(I)$ : $\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic while $\mathrm{SnO}$ and $\mathrm{PbO}$ are amphoteric in nature.

Statement $(II)$ : Allotropic forms of carbon are due to property of catenation and $\mathrm{p} \pi-\mathrm{d} \pi$ bond formation.

In the light of the above statements, choose the most appropriate answer from the options given below:

  • A
    Both Statement $I$ and Statement $II$ are false
  • B
    Both Statement $I$ and Statement $II$ are true
  • Statement $I$ is true but Statement $II$ is false
  • D
    Statement $I$ is false but Statement $II$ is true

Answer

Correct option: C.
Statement $I$ is true but Statement $II$ is false
c
$\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic and $\mathrm{SnO}, \mathrm{PbO}$ are amphoteric.

Carbon does not have d-orbitals so can not form $\mathrm{p} \pi-\mathrm{d} \pi$ Bond with itself. Due to properties of catenation and $\mathrm{p} \pi-\mathrm{p} \pi$ bond formation. carbon is able to show allotropic forms.

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