Question

please answer with reason​

Answer 1

Answer:

Option B) is incorrect because magnesium never reacts with cold water , It reacts with hot water and produces Magnesium oxide and Hydrogen gas..

I hope you got it!!!

Thank you ❣️

Answer 2

To Find -

• Which of the statement is incorrect ?

Let us check all the statement.

Now,

Option 1 :-

It burns in oxygen with a dazzling white flame.

• Yes, Its correct because Magnesium burns in oxygen with a dazzling white flame

Chemical equation :-

• 2Mg + O2 → 2MgO

Option 2 :-

It react with cold water to form magnesium oxide and evolve hydrogen gas

• No, magnesium doesn't reacts with cold water

Option 3 :-

It react with hot water to form magnesium oxide and evolve hydrogen gas.

• Yes, it is correct magnesium reacts with hot water to form magnesium oxide and hydrogen gas.

Chemical equation :-

• Mg + H2O(hot) → MgO + H2

Option 4 :-

It reacts with steam to form magnesium hydroxide and evolve hydrogen gas.

• Yes, it is correct magnesium reacts with steam to form magnesium hydroxide and evolve hydrogen gas.

Chemical equation :-

• Mg + 2H2O(steam) → Mg(OH)2 + H2

Hence,

The Option 2 is incorrect.