Unit 7 The P Block Elements (Intext Questions-9)
Intext Questions
7.16 Which of the following does not react with oxygen directly?
$\mathrm{Zn}, \mathrm{Ti}, \mathrm{Pt}, \mathrm{Fe}$
Answer Pt is a noble metal and does not react very easily. All other elements, $\mathrm{Zn}, \mathrm{Ti}, \mathrm{Fe}$, are quite reactive. Hence, oxygen does not react with platinum (Pt) directly.Show Answer
(i) $\mathrm{C_2} \mathrm{H_4}+\mathrm{O_2} \rightarrow$
(ii) $4 \mathrm{Al}+3 \mathrm{O_2} \rightarrow$
Show Answer
Answer
(i) $ \underset{\text{Ethene}}{\mathrm{C_2} \mathrm{H_4}}+\underset{\text{Oxygen}}{3 \mathrm{O_2}} \longrightarrow \underset{\text{Carbon dioxide}}{2 \mathrm{CO_2}}+ \underset{\text{Water}}{2 \mathrm{H_2} \mathrm{O}} $
(ii) $ \underset{\text{Aluminium}}{4 \mathrm{Al}}+ \underset{\text{Oxygen}}{3 \mathrm{O_2}} \longrightarrow \underset{\text{Alumina}}{2 \mathrm{Al_2} \mathrm{O_3}} $
