Question

Answer all 3 questions​

Answer 1

Answer:

27. C) combination reaction

28) A)displacement reaction

29) D) decomposition reaction

Explanation:

27.CaO(s) + H2O(l) → Ca(OH)2(aq)

(Quicklime) → (Slaked lime)

28)Copper metal is more reactive than silver metal thus, when copper coin is kept immersed in silver nitrate solution for some time, it displaces silver from silver nitrate solution.

The reaction is :

Cu + 2AgNO3 ---> Cu(NO3)2 + 2Ag

The grey solid crystal of Ag metal are seen growing on the copper coin and solution turns blue in colour.

Answer 2

1. Combination Reaction.

2.Displacement Reaction.

3. Decomposition Reaction