If you have a mixture of CO and $C O_{2}$ , how would you know about the relative proportions of the two gases in the given mixture?

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Solution

$(i) P a s s m i x t u r e t h r o u g h t h e C a (O H)_{2} s o l u t i o n; C O_{2} i s a b s o r b e d C a (O H)_{2} . T h e r e s i d u a l v o l u m e w i l l b e t h a t o f C O . C a (O H)_{2} + C O_{2} C a C O_{3} + H_{2} O (i i) P a s s m i x t u r e t h r o u g h I_{2} O_{5}; C O r e d u c e s I_{2} O_{5} t o I_{2} . 5 C O + I_{2} O_{5} I_{2} + 5 C O_{2} I_{2} t h u s l i b e r a t e d i s d e t r m i n e d b y t i t r a t i o n w i t h {N a}_{2} S_{2} O_{3} 2 {N a}_{2} S_{2} O_{3} + I_{2} 2 N a l + {N a}_{2} S_{4} O_{6} T h i s i s t h e q u a n t i t a t i v e m e t h o d o f e s t i m a t i o n o f C O .$

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