identify the substance which is oxidised and reduced, oxidising agent, reducing agent.
1. Calcium oxide when treated with water forms calcium hydroxide and heat.
2. Magnesium reacts with nitric acid to form magnesium nitrate and hydrogen.

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Solution

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

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identify the substance which is oxidised and reduced, oxidising agent, reducing agent. 1. Calcium oxide when treated with water forms calcium hydroxide and heat. 2. Magnesium reacts with nitric acid to form magnesium nitrate and hydrogen.

identify the substance which is oxidised and reduced, oxidising agent, reducing agent.
1. Calcium oxide when treated with water forms calcium hydroxide and heat.
2. Magnesium reacts with nitric acid to form magnesium nitrate and hydrogen.