How many total statements are correct in the | vedclass

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(D) $(i)$ $SO_2$ acts as an antichlor and a food preservative. (Correct)$(ii)$ $O_3$ is used as a disinfectant for water. (Correct)$(iii)$ $Cl_2$ is u

Vedclass · Accepted Answer

$5$

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(D) $(i)$ $SO_2$ acts as an antichlor and a food preservative. (Correct)$(ii)$ $O_3$ is used as a disinfectant for water. (Correct)$(iii)$ $Cl_2$ is used as a disinfectant and for bleaching,but it is not typically classified as an antiseptic. (Incorrect)$(iv)$ $O_2$ is used in oxy-acetylene welding. (Correct)$(v)$ $PH_3$ is used in Holme's signals (smoke screens). (Correct)$(vi)$ $HNO_3$ is used for the pickling of stainless steel. (Correct)Therefore,statements $(i), (ii), (iv), (v),$ and $(vi)$ are correct. The total number of correct statements is $5$.

How many total statements are correct in the following?
$(i)$ $SO_2$ - antichlor,preservative
$(ii)$ $O_3$ - Disinfectant
$(iii)$ $Cl_2$ - Antiseptic
$(iv)$ $O_2$ - used in oxy-acetylene welding
$(v)$ $PH_3$ - used in smoke screens
$(vi)$ $HNO_3$ - Pickling of stainless steel

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How many total statements are correct in the following?$(i)$ $SO_2$ - antichlor,preservative$(ii)$ $O_3$ - Disinfectant$(iii)$ $Cl_2$ - Antiseptic$(iv)$ $O_2$ - used in oxy-acetylene welding$(v)$ $PH_3$ - used in smoke screens$(vi)$ $HNO_3$ - Pickling of stainless steel