Questions

Chloroquine is a medication used to prevent and to treat malaria.

She don't speak either German or French is the correct sentence in English.

Given Equation is 

Mg + O2 → MgO

Balancing the Chemical Equation is nothing but Conservation of Matter. As Matter is Neither created nor Destroyed, it must be conserved.

Here we have 1 Mg and 2 O on the left side and 1 Mg and 1 O on the right side

To balance that, add 1 Mg on the left side so that it becomes 2 Mg and 2 O on the left side

i.e,

2 Mg + O2 → 2 MgO

Here it has 2 Mg & 2 O on the left side and 2 Mg and 2 O on the right side and the Chemical equation is Balanced.

‘To dispose of’ is the correct phrase to be used here. It means to get rid of something by selling or giving. Thus, the correct formation would be, ‘Raman wants to dispose of his house’.