Question
निम्नलिखित में से कौन-से लुईस अम्ल हैं?
$\mathrm{H}_{2} \mathrm{O}, \mathrm{BF}_{3}, \mathrm{H}^{+}, \mathrm{NH}_{4}^{+} $
$\mathrm{H}_{2} \mathrm{O}, \mathrm{BF}_{3}, \mathrm{H}^{+}, \mathrm{NH}_{4}^{+} $
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