Question

Which of the following statements is true ?

• A. When an aqueous solution of $NaCl$ is electrolysed, sodium metal is deposited at cathode
• B. There is no difference between specific conductivity and molar conductivity
• C. Silver nitrate solution can be stored in a copper container
• D. The addition of liquid bromine to iodide solution turns it violet

Answer 1

Answer: (D)

When an aqueous solution of $NaCl$ is electrolysed, hydrogen is liberated at cathode. Specific conductivity and molar conductivity are different terms. Silver nitrate solution cannot be stored in a copper container as silver will get precipitated because of high reactivity of $Cu$ than $Ag$.
The addition of liquid bromine to iodide solution turns it violet.
$\underset{\text{Reddish-brown}}{Br_{2(l)} +2I^{-}_{(aq)}}\to2Br^{-}_{(aq)}$ $\underset{\text{Violet}}{I_{2(l)}}$