<p>In a experiment it is shown that 10 mL of 0.05M solution of chloride required&nbsp; 10 mL of 0.1 M solution of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>A</mi><mi>g</mi><mi>N</mi><msub><mi>O</mi><mn>3</mn></msub></math>, which of the following will be the formula of the chloride (X stands for the symbol of the element other than chlorine):</p>