MCQ
Borax is used as cleansing agent because on dissolving in water it gives
- ✓Alkaline solution
- BAcidic solution
- CBleaching solution
- DColloidal solution
$Na_2B_4O_7 + 7H_2O \to 4H_3BO_3 + 2NaOH$
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$(A)$ Hydrated $Al _2 O _3$ precipitates, when $CO _2$ is bubbled through a solution of sodium aluminate.
$(B)$ Addition of $Na _3 AlF _6$ lowers the melting point of alumina.
$(C)$ $CO _2$ is evolved at the anode during electrolysis.
$(D)$ The cathode is a steel vessel with a lining of carbon.


