Q8 of 47 Page 1

Complete and balance the following equations-

(a) S + H2SO4 (conc.)


(b) PCl3 + H2O


OR


Write balanced chemical equations involved in the following reactions-


(a) Chlorine gas reacts with cold and dilute NaOH.


(b) Calcium phosphide is dissolved in water.


(a) S + 2H2SO4 (conc.) 3SO2 + 2H2O


Sulphur is oxidized to SO2.


(b) PCl3 + 3H2O 3HCl + H3PO3


PCl3 fumes in moisture due to formation of HCl.


OR


(a) Cl2 + 2NaOH NaCl + NaOCl + H2O


(Sodium hypochlorite)


(b) Ca3P2 + 6 H2O 3Ca(OH)2 + 2PH3


(phosphine)


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