\( 20 \mathrm{~mL} \) of \( \times \mathrm{M} \mathrm{HCl} \) neutralizes completely \( 10 \math...

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\( 20 \mathrm{~mL} \) of \( \times \mathrm{M} \mathrm{HCl} \) neutralizes completely \( 10 \mathrm{~mL} \) of \( 0.1 \mathrm{M} \) \( \mathrm{NaHCO}_{3} \) and a further \( 5 \mathrm{~mL} \) of \( 0.2 \mathrm{M} \mathrm{Na}_{2} \mathrm{CO}_{3} \) solution to methyl orange end point. The value of \( \mathrm{x} \) is:
(a) \( 0.167 \mathrm{M} \)
(b) \( 0.133 \mathrm{M} \)
(c) \( 0.150 \mathrm{M} \)
(d) \( 0.200 \mathrm{M} \)
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