Question

The value of x, y and z in the following equation are:

$x{H}_2+y{O}_2\to z{H}_{2}O$

• A. -1 charge
• B. +1 charge
• C. + 2 charge
• D. None of these.

Answer 1

The correct option is A

-1 charge

In the given equation, we first see the number of atoms which are present on both the sides.

On the LHS, hydrogen atoms =2, and oxygen atoms = 2.

On the RHS, hydrogen atoms = 2, and oxygen atoms = 1. So, we need to balance the oxygen atoms.

Let's do so by multiplying 2 to $H_{2}O$ molecule. Now the number of oxygen = 2 but with this, on the RHS, the number of hydrogen atoms = 4. So we multiply 2 to $H_2$ on the LHS in order to balance the hydrogen. Now all the atoms are balanced on both the sides and hence the equation is balanced.

$2H_2+O_2\to 2H_{2}O$