Question

Tell the answer fast ​

Answer 1

Answer:

$\ 4Na + O_2 \: \: \: gives \: \: \: 2Na_2O$

Explanation:

Because in the above equation, Na and $\ O_2$ both are elements.

1. $\ CaO + CO_2 \: \: gives \: \: CaCO_3$

It is a combination of compounds.

3. $\ SO_2 + \frac {1}{2} O_2 \: \: gives \: \: SO_3$

In this equation, it's a combination of compound and a element.

4. $\ 2Na + 2H_2O \: \: gives \: \: 2NaOH + H_2$

It's a combination of element and a compound.

So,the correct answer is option 2)✔️

Answer 2

Answer:

second option is the right answer