Which salt gives an acidic solution (pH below 7, turns blue litmus red)

1. A.
   $CH_3COONa$
2. B.
   $Na_2SO_4$
3. C.
   $CuSO_4$
4. D.
   $Na_2CO_3$

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1. A.
   $\text{Na}_2\text{CO}_3$
2. B.
   $\text{NH}_4\text{NO}_3$
3. C.
   $\text{NH}_4\text{CN}$
4. D.
   $\text{KCN}$

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1. A.
   $\text{CuCl}_2$
2. B.
   $\text{NH}_4\text{CN}$
3. C.
   $\text{KCN}$
4. D.
   $\text{CH}_3\text{COONa}$

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1. A.
   KCN
2. B.
   ${Na}_{2}{CO}_{3}$
3. C.
   $\ {NaNO}_{3}$
4. D.
   ${CuCl}_{2}$

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1. A.
   ${CuSO}_{4}$
2. B.
   $\ {Na}_{2}{CO}_{3}$
3. C.
   ${Na}_{2}{SO}_{4}$
4. D.
   $\ {NaNO}_{3}$

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1. A.
   $\mathrm{KNO_3}$
2. B.
   $\mathrm{Na_2CO_3}$
3. C.
   $\mathrm{CH_3COONH_4}$
4. D.
   $\mathrm{CuCl_2}$

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1. A.
   $\mathrm{Na_2CO_3}$
2. B.
   $\mathrm{CuCl_2}$
3. C.
   $\mathrm{CH_3COONa}$
4. D.
   $\mathrm{NaNO_3}$

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