MCQ
Oxidation number of $S$ in $SO_4^{2 - }$
- ✓$+6$
- B$+3$
- C$+2$
- D$-2$
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$C{H_4}(g) + 2{O_2}(g) \to C{O_2}(g) + 2{H_ {2}}O(l);$
$\Delta H = - 890.3\,kJ$
How many grams of methane would be required to produce $445.15\, kJ$ of heat of combustion.....$g$
Reason : Size of fluorine is small and its lone pair of electrons interacts with $d-$ orbitals of $Si$ strongly.