- Messages
- 259
- Reaction score
- 51
- Points
- 38
carolinetcw said:i wrote magnesium for the alkaline one. Mg reacts with H2O to form Mg(OH)2 which is also alkaline as its a hydroxide,right? I hesitated to use potassium cause i thought reaction wud be explosive,lol.Prince III said:maths maldives said:can anybody tell the questions & answers of complete question number 1 from section A (paper22)
1. name the metal which forms alkaline solution in water
A. pottasium (k) fisrt group metals are called alkali metals
2.name the metal which forms oxide layer
A . aluminium
3.name a metal which rust it self to protect the other metal from rusting
A . magnisium
4.name a metal from period V
A.silver (Ag)
this is all i could remember
(b) structure of typical metal and labeling
both would be correct
altough potassium reacts voilently with water with flames but after some seconds when the flames stops , hydrogen gas is released leaving behind alkaline soluntion
2K(s) + 2H20(l) = 2KOH(aq) + H2(g)