Question

....heya....swt hearts...
.............................................................

##an alkali metal gives A compound B ( molecular mass= 40) on reacting with water the compound B gives a soluble compound C on treatment with Aluminium oxide .Identify A, B, and C give the reaction involved.

.............................................................
FOLLOW ME
.............................................................​

Answer 1

Answer:

alkali metals are    sodium, potassium, lithium etc.

On reacting with water , they give metal hydroxide..  M_k (OH)_n

Hydroxide molecular mass = 17..

As molecular mass of the metal hydroxide is 40,  n = 1 or 2,  and  correspondingly the molecular mass of metal is  23 or 6.

That is metal A is  either sodium or lithium.

Compound B is  :  sodium hydroxide or  lithium hydroxide..  Lithium hydroxide - molecular mass is not 40..  

So metal A is Sodium : Na...    compound B is sodium hydroxide.

  aluminum oxide:   Al₂ O₃ + 2 Na OH  +3 H₂O ==> 2 Na Al (OH)₄

         

Compound C :    colourless solution in water ... of  compound : sodium tetra aluminate..

Answer 2

a is sodium

b is sodium hydroxide

c is sodium tetra

mark me as brainliest

cht me on my question

cht me in my question