Question

Assertion :Potassium bromide (KBr) is a strong electrolyte. Reason: Potassium bromide completely disassociates in water.

• A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
• B. If Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
• C. If Assertion is correct but Reason is incorrect
• D. If Assertion is incorrect but Reason is correct

Answer 1

The correct option is A If both Assertion and Reason are correct and Reason is the correct explanation of Assertion

$KBr$ is a strong electrolyte as it gets almost completely dissociated in aqueous solution. A strong electrolyte is one that undergoes complete dissociation in the solution and a weak electrolyte is one that undergoes partial dissociation.

Strong electrolytes are good conductors of electricity and weak electrolytes are weak conductors of electricity. Potassium bromide is soluble in water and releases a $K^{+}$ ion and a $B{r}^{-}$ ion.

Dissociation of potassium bromide:

$KBr\left(s\right)\to K^{+}\left(aq\right)+B{r}^{-}\left(aq\right)$