નીચેના દ્રાવણોની $pOH$ના ઘટતા ક્રમમાં ગોઠવણી કરો:

$(A)$ $0.01 \,M\, HCl$

$(B)$ $0.01 \,M \,NaOH$

$(C)$ $0.01 \,M \,CH _{3} COONa$

$(D)$ $0.01 \,M \,NaCl$

Question

નીચેના દ્રાવણોની $pOH$ના ઘટતા ક્રમમાં ગોઠવણી કરો:

$(A)$ $0.01 \,M\, HCl$

$(B)$ $0.01 \,M \,NaOH$

$(C)$ $0.01 \,M \,CH _{3} COONa$

$(D)$ $0.01 \,M \,NaCl$

JEE MAIN 2020, Easy

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Solution

d
$(i)$ $10^{-2} M HCl \Rightarrow\left[ H ^{+}\right]=10^{-2} M \rightarrow pH =2$

$(ii)$ $10^{-2} M NaOH \Rightarrow\left[ OH ^{-}\right]=10^{-2} M \rightarrow PoH =2$

$(iii)$ $10^{-2} M CH _{3} COO ^{- Na ^{+}} \Rightarrow\left[ OH ^{+}\right]>10^{-7} \Rightarrow poH <7$

$(iv)$ $10^{-2} M NaCl \Rightarrow$ Neutral pot $=7$

$(i)>(i v)>(i i i)>(i i)$

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