identify the substance which is oxidised and reduced, oxidising agent and reducing agent.
1. Calcium carbonate reacts with hydrochloric acid will form calcium chloride, water and carbon dioxide.
2. Sulphuric acid reacts with zinc form zinc sulphate and hydrogen.

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Solution

$1) C a C O_{3} + 2 H C l \to C a C l_{2} + H_{2} O + C O_{2} T h e o x i d a t i o n s t a t e o f C a r b o n i n L H S C a C O_{3} + 2 + x + 3 (- 2) = 0 x - 4 = 0 x = + 4 T h e o x i d a t i o n s t a t e o f C a r b o n i n R H S C O_{2} x + 2 (- 2) = 0 x = + 4 T h e r e i s n o c h a n g e i n o x i d a t i o n s t a t e . S o t h i s r e a c t i o n i s n o t a r e d o x r e a c t i o n . 2) Z n + H_{2} S O_{4} \to Z n S O_{4} + H_{2} O x i d a t i o n s t a t e o f o f Z n = 0 i n L H S I n R H S Z n S O_{4} x + (- 2) = 0 x = + 2 S o t h e o x i d a t i o n s t a t e o f Z n i n c r e a s e s f r o m 0 t o + 2 . T h a t m e a n s Z i n c u n d e r g o e s o x i d a t i o n . I t a c t s a s a r e d u c i n g a g e n t . S o s u l p h u r i c a c i d u n d e r g o e s r e d u c t i o n a n d a c t s a s a n o x i d i \sin g a g e n t .$

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identify the substance which is oxidised and reduced, oxidising agent and reducing agent. 1. Calcium carbonate reacts with hydrochloric acid will form calcium chloride, water and carbon dioxide. 2. Sulphuric acid reacts with zinc form zinc sulphate and hydrogen.

identify the substance which is oxidised and reduced, oxidising agent and reducing agent.
1. Calcium carbonate reacts with hydrochloric acid will form calcium chloride, water and carbon dioxide.
2. Sulphuric acid reacts with zinc form zinc sulphate and hydrogen.