Assertion : $Al(OH)_3$ is insoluble in $NH_4OH$ but soluble in $NaOH$ .
Reason : $NaOH$ is strong alkali.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
Which metal burn in air at high temperature with the evolution of much heat
The weakest Lewis acid is
Common alum is
Which of the following is correct
When borax is heated with $CoO$ on a platinum loop, blue coloured bead formed is largely due to