Question

10. An element A react with water to form a compound B and nascent oxygen is released which is used to bleach. Compound B is has a pH around 1-2 and can be used to prepare dihydrogen gas on reaction with Zn and compound C. Identify A, B and C also write Chemical Equation for the reactions involved.​

Answer 1

$\huge{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}$

$\huge\pink{\boxed{\blue{\mathcal{\overbrace{\underbrace{\fcolorbox{blue}{aqua}{\underline{{answer}}}}}}}}}$

A is calcium. It reacts with water to give calcium hydroxide. B is calcium hydroxide and is used for white washing. C is calcium oxide.

The reactions are as follows:

Ca+2H 2O→Ca(OH) 2 +H 2

Ca(OH) 2 →CaO+H 2 O

CaO+H 2 O→Ca(OH) 2

Answer 2

Answer:

The reactions are :

Ca + 2H2O → Ca(OH)2 + H2

Ca(OH)2 → CaO + H2O

CaO + H2O → Ca(OH)2

A is calcium which reacts with water to give calcium hydroxide .

B is calcium hydroxide which is used for white washing .

C is calcium oxide .